Cross-reference to Related Applications

This application claims the benefit of United States Provisional Patent Application Serial No. 61/193,809 filed December 24, 2008, the entire contents of which is herein incorporated by reference.

Field of the Invention

This invention relates generally to biotechnology and, more particularly to the modification of plant growth and development and the enhancement of crop performance through manipulation of TOR gene expression and TOR interacting protein (TIPs) gene expression.

Background of the Invention

TOR (target of rapamycin) encodes a large Ser/Thr protein kinase which is structurally and functionally conserved in eukaryotic species from yeast to animals to plants. TOR is a catalytic subunit of a large protein complex and plays a central role in the regulation of cell growth, differentiation, proliferation, survival, protein synthesis and transcription by integrating signals from hormones, nutrients and the environment (De Virgilo 2006; Wullschleger 2006; lnoki 2006).

In yeast, TOR is encoded by two genes (TOR1 and TOR2), which have 80% overall amino acid similarity, and interacts with other regulatory proteins to form two distinct complexes, TOR complex 1 (TORC1) and TOR complex 2 (TORC2), respectively. TORC1 in yeast is inhibited by rapamycin and is responsive to nutrient and growth factor cues to regulate temporal cell growth and metabolism, while TORC2 is not inhibited by rapamycin and is implicated in the regulation of cytoskeleton and spatial aspects of cell growth such as cell polarity. (De Virgilo 2006; Weissman 2001).

In contrast to yeast other eukaryotes possess only a single TOR gene but as in yeast, TOR exists in two distinct complexes: TORC1 and TORC2. In mammals and C. elegans. TORC 1 is rapamycin sensitive, while TORC2 is insensitive. The Arabidopsis genome contains only one copy of TOR which is insensitive to rapamycin. It remains to be determined if there are two functional TOR complexes in plants analogous to other eukaryotes, (Loewth 2002; Wullschleger 2006) The TOR protein possesses several different functional domains The N-terminal 1200 residues consist of 20 HEAT repeats, which typically mediate protein-protein interactions Following the HEAT repeat region is the focal adhesion target (FAT) domain which has been suggested to facilitate protein binding The TOR protein further comprises the FRB domain, the binding site for the FKBP-rapamycin complex The catalytic serine/threonine kinase domain, which contains a conserved lipid kinase motif, is adjacent to FATC domain, a putative scaffolding domain, which is located at the extreme carboxyl terminus (Kunz 2000, Andrade 1995, Bosotti 2000, Zheng 1995)

TOR1 knockout yeast strains display small cell size, slow growth rate, and hypersensitivity to temperature and osmotic stress In contrast, loss of TOR2 function arrests growth in the early G1 phase of the cell cycle In mice, disruption of TOR causes lethality at embryonic day 5 5 (E5 5) and proliferation arrest in embryonic stem cells The protein sequence of TOR from Arabidopsis shows 60% and 59% identity with TOR2 and

TOR1 from yeast Disruption of AtTOR leads to the premature arrest of endosperm and embryo development at a very early globular stage, (16-64 cells) (Barbet 1996, Gangloff

2004, Murakamie 2004, Menand 2002, Mahfouz 2006)

In yeast and mammals, inhibition of the TOR signaling pathway by nutrient starvation or rapamycin treatment leads to a rapid down regulation of 18S, 5 8S, 25S and 5S rRNA synthesis and subsequent transcription of the majority of the 130 ribosome protein genes The rate of cell proliferation and growth directly depends on the rate of protein synthesis, and in turn, protein synthesis depends on ribosome biogenesis Ribosome biogenesis requires coordination of the production of ribosome components, including 4 different rRNA molecules and 130 ribosome proteins TOR is suggested be a central regulator for ribosome biogenesis through RNA polymerase I dependent modulation of 18S, 5 8S and 25S πbosomal RNA transcription (RNA polymerase Il drives expression of ribosome proteins and RNA polymerase III controls 5SrRNA synthesis) (Warner 2001 , Powers 1999)

Plant growth and development is highly dependent on environmental interactions that are pivotal for survival Plants adjust growth and development in relation to nutrient availability, light intensity, water availability and additional environmental parameters The mechanisms that are involved in the perception and transduction of these environmental cues are poorly understood (Mahfouz 2006, Deprost 2007)

There remains a need for methods of regulating plant growth and development Summary of the Invention

Recently it has been appreciated that growth in plants is positively correlated with expression of the (TOR) gene and that TOR may be fundamentally involved in control of growth and development The TOR signaling network comprises a complex nexus of regulatory proteins that when manipulated by silencing or over-expression lead to many different changes in plant growth and development

The present invention relates to AtTOR nucleic acid molecules and proteins from Arabidopsis thahana and BnTOR nucleic acid molecules and proteins from Brassica napus that are important controlling factors for the regulation of growth and development in plants

The present invention further relates to 30 or more TOR-I nteracting Proteins, (TIPs) that form part of a regulatory protein complex that affects many aspects of growth and development, and to nucleic acid molecules encoding the TIPs

The present invention further relates to a method of regulating plant growth and development More specifically the present invention relates to the expression of nucleic acid molecules of the present invention in recombinant plants to effect changes in plant growth and development

Thus, there is provided a method of regulating growth and development in a plant comprising introducing into the plant a nucleic acid molecule encoding a target of rapamycin (TOR)-ιnteractιng protein (TIP), a target of rapamycin (TOR) protein or a protein kinase domain of a target of rapamycin (TOR) protein, under conditions whereby the nucleic acid molecule is over-expressed thereby altering plant growth and development

The present invention further relates to a method of increasing ribosome biogenesis by increasing ribosomal RNA and ribosomal protein synthesis in a plant cell comprising introducing into the plant cell a nucleic acid molecule encoding a target of rapamycin (TOR) protein or a protein kinase domain of a TOR protein under conditions whereby the nucleic acid molecule is over-expressed thereby increasing ribosomal RNA expression and ribosome biogenesis in the plant cell

The present invention further relates to decreasing ribosome biogenesis by decreasing ribosomal RNA expression and ribosome protein synthesis in a plant cell comprising silencing a native nucleic acid molecule encoding a target of rapamycin (TOR) protein or a protein kinase domain of a TOR protein thereby decreasing ribosome biogenesis and ribosomal RNA expression in the plant cell The present invention further relates to a method of altering phenotype of a plant comprising over-expressing in the plant a nucleic acid molecule encoding a target of rapamycin (TOR) protein, a protein kinase domain of a TOR protein, or a TOR-interacting protein (TIP)

Phenotypic changes that may result from over-expression of a nucleic acid molecule encoding a TOR protein, a protein kinase domain of a TOR protein or a TOR-interacting protein (TIP) in a plant include, for example, increased cell number, increased leaf size, increased stem size, increased nutπent-use-efficiency, increased water-use-efficiency, increased seed size, increased seed number, increased flower number, earlier flowering, increased branching, increased oil content or any combination thereof, compared to a wild- type plant grown under the same conditions

In one embodiment, over-expression of a nucleic acid molecule encoding a target of rapamycin (TOR) protein or a protein kinase domain of a TOR protein in a plant results in a phenotypic change in the plant, for example, increased cell number, increased cell size, increased water-use-efficiency, increased seed size, increased seed number, earlier flowering or any combination thereof, compared to a wild-type plant grown under the same conditions

In one embodiment, there is provided a method of modulating the flowering time of a plant comprising introducing into cells of said plant a nucleic acid molecule encoding a target of rapamycin (TOR) protein or a protein kinase domain of a TOR protein under conditions whereby the nucleic acid molecule is over-expressed thereby modulating the flowering time of said plant Preferably, the method reduces the time required for a plant to commence flowering

In one embodiment, there is provided a method of increasing the size of seed produced by a plant said method comprising introducing into cells of said plant a nucleic acid molecule encoding a target of rapamycin (TOR) protein or a protein kinase domain of a

TOR protein under conditions whereby the nucleic acid molecule is over-expressed thereby increasing seed size of said plant

In one embodiment, there is provided a method of increasing the drought (water stress) tolerance of a plant said method comprising introducing into cells of said plant a nucleic acid molecule encoding a target of rapamycin (TOR) protein or a protein kinase domain of a TOR protein under conditions whereby the drought tolerance of said plant is increased There is also provided a method of regulating growth and development in a plant comprising silencing in the plant expression of a TOR protein, a protein kinase domain of a TOR protein or a protein that interacts with TOR Regulation of growth and development can lead to altered phenotypes that are commercially useful

There is also provided a use of a TOR protein or a protein kinase domain of a TOR protein for identifying proteins involved in developmental pathways in a plant associated with TOR Thus, a method of identifying a TOR-interacting protein (TIP) involved in developmental pathways in a plant comprises providing a test organism having a phenotypic deficiency arising from non-functioning of a transcription factor, introducing into the organism a protein construct comprising a TOR protein or a protein kinase domain of a TOR protein and a binding domain of the transcription factor, introducing into the organism a protein construct comprising a protein of interest and an activation domain of the transcription factor, and, determining whether the transcription factor functions thereby determining that the protein of interest is a TOR-interacting protein

There is also provided an isolated or purified polypeptide comprising an amino acid sequence having at least 85% sequence identity to the amino acid sequence as set forth in SEQ ID NO 4, SEQ ID NO 6, SEQ ID NO 8, SEQ ID NO 10, SEQ ID NO 12, SEQ ID NO 14, SEQ ID NO 16, SEQ ID NO 18, SEQ ID NO 20, SEQ ID NO 22, SEQ ID NO 24, SEQ ID NO 26, SEQ ID NO 28, SEQ ID NO 30, SEQ ID NO 32, SEQ ID NO 34, SEQ ID NO 36, SEQ ID NO 38, SEQ ID NO 40 or SEQ ID NO 42, or a conservatively substituted amino acid sequence thereof

There is also provided an isolated or purified nucleic acid molecule comprising a nucleotide sequence having at least 85% sequence identity to the nucleotide sequence as set forth in SEQ ID NO 3, SEQ ID NO 5, SEQ ID NO 7, SEQ ID NO 9, SEQ ID NO 11 , SEQ ID NO 13, SEQ ID NO 15, SEQ ID NO 17, SEQ ID NO 19, SEQ ID NO 21 , SEQ ID NO 23, SEQ ID NO 25, SEQ ID NO 27, SEQ ID NO 29, SEQ ID NO 31 , SEQ ID NO 33, SEQ ID NO 35, SEQ ID NO 37, SEQ ID NO 39 or SEQ ID NO 41 , or a codon degenerate nucleotide sequence thereof

The present invention further relates to a plant cell, plant seed or plant having introduced therein a nucleic acid molecule encoding a target of rapamycin (TOR) protein, a protein kinase domain of a TOR protein, or a TOR-interacting protein (TIP), expression of the nucleic acid molecule altering growth and development of the cell, seed or plant in comparison to a cell, seed or plant in which the nucleic acid molecule is not introduced Particularly preferred plants for modification, either through over-expression or silencing, include Arabidopsis thahana, Brassica spp (e g S napus, B oleracea, B rapa, B caπnata, B juncea), Borago spp (e g borage), Ricinus spp (e g castor (Ricinus communis)), Theobroma spp (e g cocoa bean {Theobroma cacao)), Zea spp (e g corn (Zea mays)), Gossypium spp (e g cotton), Crambe spp , Cuphea spp , Linum spp (e g flax) Lesquerella spp , Limnanthes spp , Linola, Tropaeolum spp (e g nasturtium), Oenothera spp , Olea spp (e g olive), Elaeis spp (e g palm), Arachis spp (e g peanut), Carthamus spp , (e g safflower), Glycine spp and Soja spp (e g soybean), Hehanthus spp (e g sunflower), Nicotiana spp (e g tobacco), Vernonia spp , Tπticum spp (e g wheat), Hordeum spp (e g barley), Oryza spp (e g rice), Avena spp (e g oat), Sorghum spp , Secale spp (e g rye), Medicago sativa (alfalfa), Lens culinaπs (lentils), and Cicer arietinum (chick pea) Brassica spp are most preferred

Further features of the invention will be described or will become apparent in the course of the following detailed description

Brief Description of the Drawings

In order that the invention may be more clearly understood, embodiments thereof will now be described in detail by way of example, with reference to the accompanying drawings, in which

Fig 1A depicts a series of insertion/knockout mutants from N to C terminal of TOR that were genotyped and phenotyped

Fig 1 B depicts pictures showing that embryo development is blocked at 16-32 cells in AtTOR mutant lines Embryo phenotype of AtTOR knockout line (1 and 2) and Nomarski optics images of TOR/TOR (3) and tor/tor (4 and 5) are shown Pictures 3, 4 and 5 are shown at the same magnification, respectively

Fig 2A depicts distribution of six putative nuclear localization sites (NLS) in AfTOR and generation of a series of /AfTOR deletion mutants fused with green fluorescent protein (GFP) and expression in onion epidermal cells show that NLS of AfTOR resides in kinase domain

Fig 2B illustrates that RPRK motif is essential for A(TOR nuclear localization

Fig 2C depicts representative images of AtTOR nuclear localization Onion epidermal cells were examined under bright-field (1) Transient expression of AfTOR GFP construct in onion epidermal cells show the localization of GFP signal in both nucleus and cytoplasm (2) DAPI nuclear staining (3) DAPI+GFP co-localization (4)

Fig 3A depicts full-length /WTOR and deletion derivatives of AfTOR, and phenotypes of ectopically expressed AtTOR and it's deletion derivatives with reference to ribosomal RNA (rRNA) expression The symbols +, ++, +++ and ++++ corresponds to 1 , 2, 3 and 4 fold increases in rRNA expression, respectively

Fig 3B depicts representative phenotypes of over-expressed AfTOR and its deletion denvates in transgenic Arabidopsis (1) larger and thicker leaves, (2) enlarged stem, (3) altered root architecture

Fig 4A depicts a functional complementation assay in TORM5/torm5 background which shows that NLS6 can partially rescue the torm5/torm5 mutant phenotypes, while deletions without NLS6 fail to rescue embryo lethality

Fig 4B depicts representative images of the /AfTOR functional complementation

Fig 5 depicts a model for TOR regulation of ribosome biogenesis in Arabidopsis

Fig 6 depicts yeast culture dishes showing identification of TOR interacting proteins

(TIPs) using a yeast two hybridization system

Fig 7 depicts illustrations of embryos grown from cells in which expression of various TOR interacting proteins (TIPs) has been knocked-out

Fig 8 depicts plant cultures comparing nutrient use-efficiency phenotype of wild-type (WT) Arabidopsis plants to gain of function lines (AtTIP2, AtTIP3 and AtTIPΘ) produced with some of the TIPs

Fig 9 depicts wild-type (WT) and transgenic TIP (AtTIP3, AtTIP5, AtTIP7, AtTIPδ AtTIPI 3, AtTIPI 6 and AtTIP28) Arabidopsis plants or seeds comparing leaf, flower, inflorescence, architecture, silique and seed characteristics

Fig 10 depicts wild-type (WT) , transgenic (TF1 (TOR interacting Transcription

Factor 1) and TF2 (TOR interacting Transcription Factor 2)) and transgenic TIP (BnTIPI 5 and BnTIP20) Brassica napus plants comparing performance and yield associated phenotypes in over-expression lines of some TIPs

Fig 11 depicts wild-type (WT) and transgenic TIP (BnTIPI and BnTIP16) Brassica napus seeds comparing seed color and seed size Fig 12A depicts a flow chart illustrating isolation of TOR from Brassica napus

Fig 12B depicts a map of a BnTOR over-expression construct

Fig 13 depicts that ectopic expression of BnTOR confers better water use-efficiency in Arabidopsis (Fig 13A) and Brassica napus (Fig 13B) transgenic lines in a competitive environment

Fig 14 depicts that ectopic expression of BnTOR confers 10-15 days earlier flowering in a field (Fig 14A) and in a greenhouse (Fig 14B)

Fig 15 depicts that ectopic expression of BnTOR confers 15% bigger seeds in Brassica napus transgenic lines

Description of Preferred Embodiments

Sequence Identity

Two ammo-acid or nucleotide sequences are said to be "identical" if the sequence of ammo-acids or nucleotide residues in the two sequences is the same when aligned for maximum correspondence as described below Sequence comparisons between two (or more) peptides or polynucleotides are typically performed by comparing sequences of two optimally aligned sequences over a segment or "comparison window" to identify and compare local regions of sequence similarity Optimal alignment of sequences for comparison may be conducted by the local homology algorithm of Smith and Waterman (Smith 1981) by the homology alignment algorithm of Neddleman and Wunsch (Neddleman 1970), by the search for similarity method of Pearson and Lipman (Pearson 1988), by computerized implementation of these algorithms (GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package, Genetics Computer Group (GCG), 575 Science Dr , Madison, Wis ), or by visual inspection Isolated and/or purified sequences of the present invention may have a percentage identity with the bases of a nucleotide sequence, or the amino acids of a polypeptide sequence, of at least about 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91 %, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 99 5%, 99 6%, or 99 7% This percentage is purely statistical, and it is possible to distribute the differences between the two nucleotide sequences at random and over the whole of their length

It will be appreciated that this disclosure embraces the degeneracy of codon usage as would be understood by one of ordinary skill in the art and as illustrated in Table 1 Furthermore, it will be understood by one skilled in the art that conservative substitutions may be made in the amino acid sequence of a polypeptide without disrupting the structure or function of the polypeptide Conservative substitutions are accomplished by the skilled artisan by substituting amino acids with similar hydrophobicity, polarity, and R-chain length for one another Additionally, by comparing aligned sequences of homologous proteins from different species, conservative substitutions may be identified by locating amino acid residues that have been mutated between species without altering the basic functions of the encoded proteins Table 2 provides an exemplary list of conservative substitutions

Table 1 - Codor i Degeneracies

Table 2 - Conservative Substitutions

Tvpe of Amino Acid Substitutable Ammo Acids

Hydrophilic Ala, Pro, GIy, GIu, Asp, GIn, Asn, Ser, Thr

Sulphydryl Cys

Aliphatic VaI, lie, Leu, Met

Basic Lys, Arg, His

Aromatic Phe, Tyr, Trp The definition of sequence identity given above is the definition that would be used by one of skill in the art The definition by itself does not need the help of any algorithm, said algorithms being helpful only to achieve the optimal alignments of sequences, rather than the calculation of sequence identity From the definition given above, it follows that there is a well defined and only one value for the sequence identity between two compared sequences which value corresponds to the value obtained for the best or optimal alignment

In the BLAST N or BLAST P "BLAST 2 sequence", software which is available in the web site http //www ncbi nlm nih gov/gorf/bl2 html, and habitually used by the inventors and in general by the skilled man for comparing and determining the identity between two sequences, gap cost which depends on the sequence length to be compared is directly selected by the software (ι e 11 2 for substitution matrix BLOSUM-62 for length>85)

Over-expression

DNA isolation and cloning is well established Similarly, an isolated gene may be inserted into a vector and transformed into plant cells by conventional techniques Nucleic acid molecules may be transformed into a plant As known in the art, there are a number of ways by which genes and gene constructs can be introduced into plants and a combination of transformation and tissue culture techniques have been successfully integrated into effective strategies for creating transgenic plants These methods, which can be used in the invention, have been described elsewhere (Potrykus 1991 , Vasil 1994, Walden 1995, Songstad 1995), and are well known to persons skilled in the art For example, one skilled in the art will certainly be aware that, in addition to Agrobacterium mediated transformation of Arabidopsis by vacuum infiltration (Bechtold 1993) or wound inoculation (Katavic 1994), it is equally possible to transform other plant species, using Agrobacterium Ti-plasmid mediated transformation (e g , hypocotyl (DeBlock 1989) or cotyledonary petiole (Moloney 1989) wound infection), particle bombardment/biolistic methods (Sanford 1987, Nehra 1994, Becker 1994) or polyethylene glycol-assisted, protoplast transformation (Rhodes 1988, Shimamoto 1989) methods

As will also be apparent to persons skilled in the art, and as described elsewhere

(Meyer 1995, Datla 1997), it is possible to utilize plant promoters to direct any intended regulation of transgene expression using constitutive promoters (e g , those based on

CaMV35S) or by using promoters which can target gene expression to particular cells, tissues (e g , napin promoter for expression of transgenes in developing seed cotyledons), organs (e g , roots), to a particular developmental stage, or in response to a particular external stimulus (e g , heat shock) Promoters for use herein may be inducible, constitutive, or tissue-specific or cell specific or have various combinations of such characteristics Useful promoters include, but are not limited to constitutive promoters such as carnation etched ring virus (CERV), cauliflower mosaic virus (CaMV) 35S promoter, or more particularly the double enhanced cauliflower mosaic virus promoter, comprising two CaMV 35S promoters in tandem (referred to as a "Double 35S" promoter) Meristem specific promoters include, for example, STM, BP, WUS, CLV gene promoters Seed specific promoters include, for example, the napin promoter Other cell and tissue specific promoters are well known in the art

Promoter and termination regulatory regions that will be functional in the host plant cell may be heterologous (that is, not naturally occurring) or homologous (derived from the plant host species) to the plant cell and the gene Suitable promoters which may be used are described above The termination regulatory region may be derived from the 3' region of the gene from which the promoter was obtained or from another gene Suitable termination regions which may be used are well known in the art and include Agrobactenum tumefaciens nopaline synthase terminator (Tnos), A tumefaciens mannopine synthase terminator (Tmas) and the CaMV 35S terminator (T35S) Particularly preferred termination regions for use herein include the pea πbulose fe/sphosphate carboxylase small subunit termination region (TrbcS) or the Tnos termination region Such gene constructs may suitably be screened for activity by transformation into a host plant via Agrobactenum and screening for the desired activity using known techniques

Preferably, a nucleic acid molecule construct for use herein is comprised within a vector, most suitably an expression vector adapted for expression in an appropriate plant cell It will be appreciated that any vector which is capable of producing a plant comprising the introduced nucleic acid sequence will be sufficient Suitable vectors are well known to those skilled in the art and are described in general technical references (Pouwels 1986) Particularly suitable vectors include the Ti plasmid vectors

Transformation techniques for introducing the DNA constructs into host cells are well known in the art and include such methods as micro-injection, using polyethylene glycol, electroporation, or high velocity ballistic penetration A preferred method relies on Agrobacteπum-mediated transformation After transformation of the plant cells or plant, those plant cells or plants into which the desired nucleic acid molecule has been incorporated may be selected by such methods as antibiotic resistance, herbicide resistance tolerance to ammo-acid analogues or using phenotypic markers Various assays may be used to determine whether the plant cell shows an increase in gene expression, for example, Northern blotting or quantitative reverse transcriptase PCR (RT- PCR) Whole transgenic plants may be regenerated from the transformed cell by conventional methods

Various assays may be used to determine whether the plant cell shows an increase in gene expression, for example, Northern blotting or quantitative reverse transcriptase PCR (qRT-PCR) Whole transgenic plants may be regenerated from the transformed cell by conventional methods Such plants produce seeds containing the genes for the introduced trait and can be grown to produce plants that will produce the selected phenotype

Silencing

Silencing may be accomplished in a number of ways generally known in the art, for example RNA interference (RNAi) techniques, artificial microRNA techniques, virus-induced gene silencing (VIGS) techniques, antisense techniques, sense co-suppression techniques and targeted mutagenesis techniques

RNAi techniques involve stable transformation using RNA interference (RNAi) plasmid constructs (Helliwell 2005) Such plasmids are composed of a fragment of the target gene to be silenced in an inverted repeat structure The inverted repeats are separated by a spacer, often an intron The RNAi construct driven by a suitable promoter, for example, the Cauliflower mosaic virus (CaMV) 35S promoter, is integrated into the plant genome and subsequent transcription of the transgene leads to an RNA molecule that folds back on itself to form a double-stranded hairpin RNA This double-stranded RNA structure is recognized by the plant and cut into small RNAs (about 21 nucleotides long) called small interfering RNAs (siRNAs) siRNAs associate with a protein complex (RISC) which goes on to direct degradation of the mRNA for the target gene

Artificial microRNA (amiRNA) techniques exploit the microRNA (miRNA) pathway that functions to silence endogenous genes in plants and other eukaryotes (Schwab 2006, Alvarez 2006) In this method, 21 nucleotide long fragments of the gene to be silenced are introduced into a pre-miRNA gene to form a pre-amiRNA construct The pre-miRNA construct is transferred into the plant genome using transformation methods apparent to one skilled in the art After transcription of the pre-amiRNA, processing yields amiRNAs that target genes which share nucleotide identity with the 21 nucleotide amiRNA sequence

In RNAi silencing techniques, two factors can influence the choice of length of the fragment The shorter the fragment the less frequently effective silencing will be achieved, but very long hairpins increase the chance of recombination in bacterial host strains The effectiveness of silencing also appears to be gene dependent and could reflect accessibility of target mRNA or the relative abundances of the target mRNA and the hpRNA in cells in which the gene is active A fragment length of between 100 and 800 bp, preferably between 300 and 600 bp, is generally suitable to maximize the efficiency of silencing obtained The other consideration is the part of the gene to be targeted 5' UTR, coding region, and 3 ¹ UTR fragments can be used with equally good results As the mechanism of silencing depends on sequence homology there is potential for cross-silencing of related mRNA sequences Where this is not desirable a region with low sequence similarity to other sequences, such as a 5' or 3' UTR, should be chosen The rule for avoiding cross-homology silencing appears to be to use sequences that do not have blocks of sequence identity of over 20 bases between the construct and the non-target gene sequences Many of these same principles apply to selection of target regions for designing amiRNAs

Virus-induced gene silencing (VIGS) techniques are a variation of RNAi techniques that exploits the endogenous antiviral defenses of plants Infection of plants with recombinant VIGS viruses containing fragments of host DNA leads to post-transcnptional gene silencing for the target gene In one embodiment, a tobacco rattle virus (TRV) based

VIGS system can be used

Antisense techniques involve introducing into a plant an antisense oligonucleotide that will bind to the messenger RNA (mRNA) produced by the gene of interest The "antisense" oligonucleotide has a base sequence complementary to the gene's messenger RNA (mRNA), which is called the "sense" sequence Activity of the sense segment of the mRNA is blocked by the anti-sense mRNA segment thereby effectively inactivating gene expression Application of antisense to gene silencing in plants is described in more detail by Stam 2000

Sense co-suppression techniques involve introducing a highly expressed sense transgene into a plant resulting in reduced expression of both the transgene and the endogenous gene (Depicker 1997) The effect depends on sequence identity between transgene and endogenous gene

Targeted mutagenesis techniques, for example TILLING (Targeting Induced Local Lesions IN Genomes) and "delete-a-gene" using fast-neutron bombardment, may be used to knockout gene function in a plant (Henikoff 2004, Li 2001) TILLING involves treating seeds or individual cells with a mutagen to cause point mutations that are then discovered in genes of interest using a sensitive method for single-nucleotide mutation detection Detection of desired mutations (e g mutations resulting in the inactivation of the gene product of interest) may be accomplished, for example, by PCR methods For example, oligonucleotide primers derived from the gene of interest may be prepared and PCR may be used to amplify regions of the gene of interest from plants in the mutagenized population Amplified mutant genes may be annealed to wild-type genes to find mismatches between the mutant genes and wild-type genes Detected differences may be traced back to the plants which had the mutant gene thereby revealing which mutagenized plants will have the desired expression (e g silencing of the gene of interest) These plants may then be selectively bred to produce a population having the desired expression TILLING can provide an allelic series that includes missense and knockout mutations, which exhibit reduced expression of the targeted gene TILLING is touted as a possible approach to gene knockout that does not involve introduction of transgenes, and therefore may be more acceptable to consumers Fast-neutron bombardment induces mutations, i e deletions in plant genomes that can also be detected using PCR in a manner similar to TILLING

Silencing of the nucleic acid molecule encoding a target of rapamycin (TOR) protein or a protein kinase domain of a TOR protein in a plant results in an embryo defective phenotype, increasing the likelihood of embryo fatality or severe developmental deficiencies in the plant In view of the fundamental importance of TOR gene expression constitutive expression of a TOR gene silencing construct is less desirable than selective cell and tissue specific expression of TOR silencing sequences Thus, silencing of TOR, a protein kinase domain of TOR or a TIP in a selective cell or tissue specific manner can lead to a variety of useful phenotypes arising from such genetic ablation, for example, male sterility or female sterility Cell or tissue specific promoters, for example napin seed specific promoter or meπstem specific promoters of STM, BP, WUS, CLV genes can aid in targeting silencing to specific cells or tissues Other cell and tissue specific promoters are well known in the art

Screening for TOR-interacting Proteins (TIPs)

Screening for TOR-interacting proteins (TIPs) using the TOR protein or the kinase domain of the TOR protein can be accomplished by any suitable method For example, two-hybrid screening is one technique used to identify protein-protein interactions [Young 1998] The two-hybrid screen utilizes the fact that, in most eukaryotic transcription factors the activating and binding domains are modular and can function in close proximity to each other without direct binding Thus, even though the transcription factor is split into two fragments, it can still activate transcription when the two fragments are indirectly connected

In the yeast two-hybrid assay system (one variation of the two-hybrid screen), a yeast strain deficient in a transcription factor and therefore deficient in the biosynthesis of certain nutrients is utilized This yeast strain can be transformed simultaneously with two separate plasmids, a first plasmid engineered to produce a protein product in which the DNA-binding domain (BD) fragment of the deficient transcription factor is fused onto the TOR protein of kinase domain of the TOR protein while a second plasmid is engineered to produce a protein product in which the activation domain (AD) fragment of the deficient transcription factor is fused onto a putative TIPs If the TOR and putative TIPs proteins interact (ι e bind), then the AD and BD of the transcription factor are indirectly connected, bringing the AD in proximity to the transcription start site and transcription of a reporter gene can occur If the TOR and putative TIPs proteins do not interact, there is no transcription of the reporter gene In this way, a successful interaction between the fused protein is linked to a change in the cell phenotype

Example 1 AtTOR

Isolation of Arabidopsis DNA, Purification of Total RNA and cDNA synthesis

Genomic DNA and Total RNA was isolated from 1 -week-old Arabidopsis thaltana seedlings (ecotype Columbia) using DNeasy Plant Mini Kιt(Cat No 69104) and RNeasy Plant Mini Kit (QIAGEN, Cat No 74904) following the manufacturer's instructions A SMART RACE cDNA amplification kit (Clontech, cat No 634914) was used for cDNA amplification following the manufacturer's instructions The full-length cDNA of the wild type TOR and various truncated fragments were amplified by RT-PCR using the Advantage® 2 Polymerase Mix kit (Clontech, Cat No 639201 ) following the manufacturer's instructions Three overlapping fragments were amplified and fused together by using the restriction enzymes (BspEI and BIpI) to generate the full-length clone The sequences were verified by DNA sequencing

AfTOR is a single copy gene in Arabidopsis that encodes a 279 KD protein with Ser/Thr kinase activity Full length (7446 bp) cDNA clones of corresponding /AfTOR and its homolog in B napus were isolated The predicted TOR protein (2481 aa, SEQ ID NO 2) contains conserved HEAT repeats, FAT, FRB, kinase and FATC domains

Isolation of T-DNA Insertion Lines

To identify TOR insertional, the following salk lines were ordered from ABRC SAIL_1 149_B04, SALK_043130, SALK_138622, SALK_013925, SALK_016286, SALK_028697, SALK_017177, SALK_147473, SALK_007654, SALK_036379 The knockout lines were identified by PCR with primers designed from T-DNA Primer Design website http //signal salk edu/tdnaprimers 2 html Referring to Figs 1A and 1B, insertion/knockout mutants (tor-1 , tor-2, tor-3, tor-4, tor-5) from N to C terminal of TOR are depicted In tor-1 , HEAT repeats, FAT, FRB, kinase and FATC domains are knocked-out and the line was embryo defective with decreased rRNA expression In mutants tor-2 and tor-3, part or all of the HEAT repeats were not knocked out while FAT, FRB, kinase and FATC were knocked-out resulting in a line that was also embryo defective with decreased rRNA expression In tor-4, the FAT and FRB domains as well as the HEAT repeats remained with the kinase and FATC domains knocked-out also resulting in a line that was embryo defective with decreased rRNA expression However, in tor-5, the kinase domain as well as the HEAT repeats, FAT and FRB domains were not knocked-out with only the FATC domain knocked-out resulting in a line that was not embryo defective and did not have decreased rRNA expression Thus, it appears that TOR kinase domain is essential for embryo development and rRNA synthesis in Arabidopsis The kinase domain in AtTOR is a 300 amino acid sequence from amino acid 2050 to 2350 of SEQ ID NO 2

TOR kinase and NLS mutant and Truncation Plasmid Constructions

The TOR1 kinase and NLS mutation was introduced by PCR overlap mutagenesis using primers and The PCR product was cloned into PCR2 1 TOPO using the TA cloning Kit and the recommandent plasmids had been cleaved with Notl and Xmal and subcloned into plasmid p8WGC All other internal deletions were generated by PCR overlap mutagenesis using the TaKaRa long-range PCR system from lntergen Deletion 1962-2051 was generated with overlapping primers

Referring to Figs 2A, 2B and 2C, domains required for nuclear localization of /AfTOR were characterized Six putative nuclear localization sites (NLS1-NLS6) were identified and six deletion mutants (TOR2050-2350, TOR2031-2482, TOR1832-2482, TOR1433-2482, TOR652-2482 and TOR1-2050, where the numbers refer to the amino acids remaining in the deletion mutant) were compared to the full-length TOR (TOR) to identify which of the six putative putative nuclear localization sites (NLS) is the correct one Fig 2A demonstrates that NLS6 located in the kinase domain is the NLS To more exactly determine the amino acid sequence responsible for nuclear localization, three deletion mutants within the kinase domain surrounding NLS6 were made (Fig 2A) and it appears that RPRK motif (aa 2077- 2080 of SEQ ID NO 2) is essential for AfTOR nuclear localization In BnTOR, the kinase domain is located at aa 2049-2349 of SEQ ID NO 4 and the RPRK motif at aa 2076-2079 of SEQ ID NO 4 Referring to Figs 3A and 3B, /WTOR (TOR) and eleven deletion derivatives of AtTOR (TOR2050-2350, TOR2031-2482, TOR1832-2482, TOR1433-2482, TOR652-2482, TOR1 -1399/1801 -2482), TOR1 -2050, TOR1-1900, TOR1-1400, TOR1400-1800 and TOR1900-2050, where the numbers refer to the amino acids remaining in the deletion derivative) were over-expressed in A thaliana under the control of the CaMV 35S promoter (The deletion derivative TOR1 -1399/1801 -2482 has amino acids 1400-1800 deleted ) Over- expression of the full-length /WTOR and the eleven deletion derivatives corresponding to different functional domains of /WTOR in transgenic plants showed up-regulation of ribosomal RNA expression, and a range of developmental phenotypes It is evident from Fig 3A that, in most cases, the kinase domain is important for up-regulation of rRNA expression in transgenic plants All deletion derivatives retaining the kinase domain show up-regulated rRNA expression while only one of the five deletion derivatives not having the kinase domain show up-regulation, and that one (TOR1-2050) is only a effective at up- regulating rRNA expression as the least of the deletion derivatives that retains the kinase domain Fig 3B shows that transgenic plants over-expressing AtTOR have larger and thicker leaves, enlarged stems and altered root architecture compared to wild-type (WT) plants grown under the same conditions

Referring to Figs 4A and 4B, functional complementation assays in TORM5/torm5 background demonstrate that nuclear localization of AtTOR is important for embryo/seed development in Arabidopsis Full-length /WTOR (TOR) and four deletion derivatives (TOR2031-2482, TOR1832-2482, TOR1433-2482, and TOR1 -1399/1801 -2482, where the numbers refer to the amino acids remaining in the deletion derivative) retaining the NLS6 site were shown to at least partially rescue the torm5/torm5 mutant phenotypes However, three deletion derivatives (TOR1-2050, TOR1 -2049/2351 -2482 and TOR1 -2076/2081 -2482, where the numbers refer to the amino acids remaining in the deletion derivative) not containing NLS6 failed to rescue embryo lethality (The deletion derivative TOR1- 1399/1801-2482 has amino acids 1400-1800 deleted, TOR1 -2049/2351 -2482 has amino acids 2050-2350 deleted, and TOR1 -2076/2081-2482 has amino acids 2077-2080 deleted )

Referring to Fig 5 a proposed model for TOR regulation of ribosome biogenesis in Arabidopsis is illustrated Over-expression of /WTOR leads to a pronounced increase of ribosome RNA expression, while loss function of AfTOR causes severe repression of ribosome RNA synthesis Arabidopsis Columbia ecotype was used in all the transformation studies Example 2 Identification of TOR-interacting Proteins (TIPs)

Referring to Fig 6, a yeast two hybridization system was used to identify thirty TOR interacting proteins (TIP1 to TIP30) in Arabidopsis from screening of more than 100 putative candidates in the TOR signaling network in Arabidopsis It was found that TOR itself is a TIP, thus the label TIP1 is synonymous with TOR in this description Throughout the Figures, reference to a TIP is made in the context of the plant species from which the TIP is derived Thus, when the context is A thaliana, TIP1 (TOR) is AtTIPI (AtTOR), TIP2 is AtTI P2, etc , and in the context of B napus, TIP1 (TOR) is BnTIPI (Bn(TOR), TIP2 is BNTIP2, etc

In the yeast two hybrid method, cDNAs of TOR and its truncations were generated by RT-PCR, cloned into p8GWN Notl/Xmal cassettes box, transferred into pDEST™32 (Ampicillin resistance) and pDEST™22 (Gentamicin resistance) by LR recombination reactions respectively, and transformed into the yeast host strains MaV203 for interaction assays All the Y2H procedures were performed according to the manufacture's instruction (Invitrogen, cat no PQ10001-01 ) As above, based on the pCR8/GW/TOPO backbone, the Entry vector p8GWG with Asis l-promoter-Not l-GUS-Asc I and pδGWC with Asis I- promoter-Not I-CDS-Xma l+vGFP+Asc I cassettes was created PCR strategy In this system, the Pearleygate gateway-compatible vectors were used for destination vectors and the pCR8/GW/TOPO (Invitrogen, Cat K2500-20) was used as the backbone plasmid of entry clones As above, the Pearleygate gateway-compatible vectors were used for destination vectors and the pCR8/GW/TOPO (Invitrogen, Cat K2500-20) was used as the backbone plasmid of entry clones To recombine the sequences of interest into the pCR8/GW/TOPO vector, inserts were generated by PCR

Example 3 Silencing of TOR-interacting Proteins (TIPs)

Referring to Fig 7, knockout of several TIPs (TIPI (TOR) ₁ TIP2, TIP3, TIP5, TIP7,

TIP8, TIP10, TIP1 1 ) implicated in TOR pathway leads to Arabidopsis lines having embryo defective phenotypes Wild-type (WT) and full-length /AfTOR over-expression lines are shown as controls Analysis of the TIP knockout lines revealed developmental blocks leading to embryo lethality phenocopying AtTor mutants, suggesting likely conserved functions as a complex in similar pathways It is evident that TIPs are required for normal embryo/seed development in Arabidopsis Example 4 Over-expression of TOR-interacting Proteins (TIPs)

Construction of the p8GWN(attL1/Notl/TORKD/Ascl/attL2) Entry vector and over-expression constructions

A gateway system for creating various expression plasmids using the LR recombination reaction (Invitrogen) was used The construction of the Entry vector pδGWN is based on the pCRδ/GW/TOPO (Invitrogen, Cat K2500-20) plasmid, comprising a TOPO AT cloning site flanked by attL1 and attl_2 sites This was used as the backbone plasmid in LR recombination reactions containing the bacterial selection marker (spectionomycin resistance) which differs from the destination vectors pEarleyGate vectors comprising (kanamycin resistance), pDEST15 comprising (Ampicillin resistance), pDEST™32 comprising (Ampicillin resistance) and pDEST™22 comprising (Gentamicin resistance) To create pδGWN, inserts were amplified by PCR using forward primers adding a Not I site at the 5' end and reverse primers with Xmal I site at the 5' end Cloned PCR products were directly inserted into pCR8/GW/TOPO and sequenced to make sure the in-frame between attL1 sequence and ORF of target gene To clone wild type TOR and its truncated fragments into the pδGWN, all PCR products, with the Not I site in 5' end and Xmal I site in 3' end, were cloned into the TA cloning vector pCR2 1-TOPO (Invitrogen, Cat K450001) for sequencing The recombinant plasmids were digested with Not I and Asc I and cloned into pδGWN to generate the gateway system Entry vector Various plant expression constructs were made by transferring the full length and different deletion derivatives of TOR and TIP genes to appropriate pEarleyGate vectors 100, 101 , 104, 201 and 203 through LR recombination reactions The resulting plasmids were used to transform wild-type Arabidopsis plants (CoI) or Brassica napus plants by floral dipping method (Clough 199δ)

Generation ofpβGWG (attU/Asisl/TOR GUS/Ascl /attL2) and GUS histochemical analysis

1 8kb β-glucuronidase (GUS) marker gene was PCR amplified using forward primer

GUSF and reverse primer GUSR (see Table 3) inserted into pCR8/GW/TOPO using the TA cloning kit (Invitrogen, Cat K2500-20) Sequencing was done to verify in-frame between attL1 and GUS ORF A 2 7Kb region upstream of the TOR translational start site was amplified using forward primer PTORF and reverse primer PTORR (see Table 3) PCR products, were cloned into TA cloning vector pCR2 1-TOPO (Invitrogen, Cat K2000-01) for sequencing After digestion by Asis I and Not I, it was subcloned into the Asis I/Not I cassettes upstream of the GUS coding region to generate p8GWG(TOR GUS) TOR GUS was transferred into pEarleyGate303 through LR recombination reactions GUS assays were as described (Bla ^' zquez 1997) Table 3 - Primers

Generation of pdGWC (attL1/Asιsl/TOR TORKD vGFP/Ascl/attL2) and constructions for protein localization

Based on pδGWN, pδGWC (TOR TORKD vGFP) vector was created using the forward primer and reverse primer 813 bp vGFP was PCR amplified by forward primer and reverse primer As above, 2 7kb TOR promoter and 813bp vGFP were fused upstream and downstream of TORKD TOR TORKD vGFP was transferred into pEarleyGate303 through LR recombination reactions The resulting plasmids were transformed into different TOR knockout lines Arabidopsis plants (CoI) by the floral dipping method (Clough 1998)

Results

Referring to Fig 8, it is apparent that Arabidopsis plants transformed with TIP2, TIP3 or TIP6 under the control of the CaMV 35S promoter exhibit increased nutrient utilization as the transgenic plantlets are bigger and healthier than the wild-type (CoI WT) plantlets grown under the same conditions The in vitro assay for nutrient use was performed under nitrogen limiting conditions (1/10 ^th of normal levels)

Referring to Fig 9, a comparison of plant and seed characteristics between wild-type

(CoI WT) and transgenic TIP (TIP3, TIP5, TIP7, TIP8 TIP13, TIP16 and TIP28) Arabidopsis plants or seeds shows that ectopic expression of TIPs alters developmental programs involving leaf, flower, inflorescence, architecture, silique and seed Phenotypes produced by the over-expression of TIPs include increased seed number, flower number and branches Earlier flowering times for TIPs plants of up to 14 days in greenhouses and up to 10 days in the field were noted, i e TIPs plant flowered up to 14 days sooner in greenhouses and up to 10 days sooner in the field than wild-type plants

Referring to Fig 10, the effect of over-expression of TIPs (TIP15 and TIP20) under the control of the CaMV 35S promoter on crop performance and yield was demonstrated in Brassica napus Comparison was made to wild-type (DH 12075 line -WT) and transgenic (TF1 and TF2) B napus lines It is evident that transgenic TIP15 plants have increased flower number, increased silique number and altered root architecture in comparison to wild- type plants It is also evident that transgenic TIP20 plants have increased branching in comparison to wild-type plants

Referring to Fig 1 1 , the color and size of seed from wild-type (WT) S napus was compared to the color and size of seeds from transgenic TIP B napus lines In TIP16 lines, TIP16 is over-expressed under the control of the CaMV 35S promoter and in TIP1 lines, TIP1 is over-expressed under the control of the CaMV 35S promoter Seeds from TIP16 transgenic plants are lighter in color than seeds from the wild-type line indicating a reduction in proanthocyanidins (PA) in the seeds of the TIP16 line Seeds from TIP1 transgenic plants are larger in size than seeds from the wild-type line

Example 5 Expression of BnTOR

Referring to Fig 12A, full length BnTOR was isolated from B napus as follows

Partial cDNA clones corresponding to putative B napus TOR gene was identified from embryo EST collection Using this sequence information, RACE™ (rapid amplification of cDNA ends) kit (Invitrogen, Cat No L1502-01) was employed for identification of BnTOR 5' and two overlapping RT-PCR reactions and sequencing of the products The BnTOR generated from PCR amplification of two overlapping fragments that contains Not I restriction site at the 5' end and Asc I restriction site at the 3' end The sequence of this clone was further confirmed by DNA sequencing BnTOR shows 92% identity at the nucleotide level and 93% identity at the amino acid level with AtTOR, respectively The BnTOR was digested with Not I and Asc I restriction enzymes and cloned into Per380 plasmid vector to generate the gateway Entry vector system as further described below The plant expression construct was generated by transferring BnTOR to destination vector Per370 to produce expression cassette that include double CaMV35S promoter to drive the expression of BnTOR transgene through LR recombination reactions The details of BnTOR isolation and construction of recombinant expression cassette was described in the Fig 12A BnTOR is a 7443 bp DNA molecule (SEQ ID NO 2) encoding a 2480 aa polypeptide (SEQ ID NO 4)

Plant expression constructs were generated using the full length and different deletion derivatives of TOR to Per370 vector through LR recombination reactions The resulting plasmids were used to transform wild-type Arabidopsis plants (CoI) by the floral dipping method (Clough 1998) and Brassica napus by cotyledonary petioles

Referring to Fig 13, Arabidopsis lines with ectopic TOR over-expression showed better water utilization when compared to wild type plants The transformed lines withstood lack of watering for a period of three weeks, while in comparison the control wild type plants (without the TOR transgene) did not survive and showed wilting (Fig 13A) Similar results were obtained with transgenic B napus, which exhibited resistance to no water for 10 days longer than wild type (Fig 13B) In transgenic Arabidopsis and S napus transgenic lines, normal growth was restored after watering, whereas the wild type plants did not recover The results demonstrate that TOR over-expression or targeted expression in transgenic lines provides protection from limited water supply or drought Referring to Fig 14, transgenic β napus lines with TOR over-expression displayed early flowering by 10-15 days in comparison to the wild type The overall yield of these plants is not compromised and similar to the wild type Homozygous B napus lines that displayed this phenotype in greenhouse conditions (Fig 14B) were tested in field conditions (Fig 14A) and early flowering was observed The results in the field are consistent with the greenhouse Thus, the growing period for β napus or other crop or economically important crop species can be significantly reduced without compromising the yield

Referring to Fig 15, transgenic B napus lines with TOR over-expression produced larger and heavier seeds Seeds from wild type plants had an average seed weight of 0 3745 g per 100 seeds, seeds from SnTORI line had an average seed weight of 0 4343 g per 100 seeds, and, seeds from BnTOR2 line had an average seed weight of 0 4296 g per 100 seeds All measurements were made with 15 repeats Thus, seeds from the transgenic lines are consistently about 15% larger and heavier than the control wild type seeds These findings were further tested in field conditions and similar results were obtained Thus, it is possible to manipulate seed size and weight by expressing, over- expressing or silencing TOR in a plant

Conclusion

The TOR gene signaling pathway is fundamental to the control of growth and development in plants and the transduction of many environmental parameters that modulate plant growth and development Experimental tools that include biochemical, molecular, developmental, genomic and loss and gain of function transgenic approaches have been applied to modulate the TOR signaling pathway in plants, using Arabidopsis d Brassica napus model systems A total of 30 proteins that interact with TOR (TIPs) have been identified and their functions are implicated in diverse developmental and biochemical processes have been investigated Functional studies with selected gene targets have shown a range of commercially valuable phenotypes that include reduced flowering time, improved nutrition-use-efficiency, improved water-use-efficiency and enhanced stress tolerance in transgenic Arabidopsis and Brassica lines

Listing of TOR and TIPs Sequences

SEQ ID NO 1 - AtTOR (AtTIPI ), nucleic acid molecule, 7446 bp, Arabidopsis thaliana

SEQ ID NO 2 - AtTOR (AtTIPI ), protein, 2481 aa, Arabidopsis thaliana

SEQ ID NO 3 - BnTOR (BnTIPI ), nucleic acid molecule, 7443 bp, Brassica napus SEQ ID NO 4 - BnTOR (BnTIPI ), protein 2480 aa, Brassica napus SEQ ID NO 5 - AtTIP2, nucleic acid molecule, 1416 bp, Arabidopsis thaliana SEQ ID NO 6 - AtTIP2, protein, 471 aa, Arabidopsis thaliana SEQ ID NO 7 - BnTIP2, nucleic acid molecule, 1389 bp, Brassica napus SEQ ID NO 8 - BnTIP2, protein, 462 aa, Brassica napus

SEQ ID NO 9 - AtTIP3, nucleic acid molecule, 873 bp, Arabidopsis thaliana SEQ ID NO 10 - AtTIP3, protein, 290 aa, Arabidopsis thaliana SEQ ID NO 1 1 - BnTIP3, nucleic acid molecule, 873 bp, Brassica napus SEQ ID NO 12 - BnTIP3, protein, 290 aa, Brassica napus SEQ ID NO 13 - AtTI P5, nucleic acid molecule, 1035 bp, Arabidopsis thaliana SEQ ID NO 14 - AtTIP5, protein, 344 aa, Arabidopsis thaliana SEQ ID NO 15 - BnTIPδ, nucleic acid molecule, 1035 bp, Brassica napus SEQ ID NO 16 - BnTIP5, protein, 344 aa, Brassica napus SEQ ID NO 17 - AtTI P6, nucleic acid molecule, 1476 bp, Arabidopsis thaliana SEQ ID NO 18 - AtTI P6, protein, 491 aa, Arabidopsis thaliana

SEQ ID NO 19 - BnTIPδ, nucleic acid molecule, 1471 bp, Brassica napus SEQ ID NO 20 - BnTIP6, protein, 490 aa, Brassica napus SEQ ID NO 21 - AtTIP7, nucleic acid molecule, 954 bp, Arabidopsis thaliana SEQ ID NO 22 - AtTIP7, protein, 317 aa, Arabidopsis thaliana SEQ ID NO 23 - AtTI P8, nucleic acid molecule, 768 bp, Arabidopsis thaliana SEQ ID NO 24 - AtTI P8, protein, 255 aa, Arabidopsis thaliana SEQ ID NO 25 - BnTI P8, nucleic acid molecule, 774 bp, Brassica napus

SEQ ID NO 26 - BnTIPδ, protein, 257 aa, Brassica napus SEQ ID NO 27 - AtTIP9, nucleic acid molecule, 1218 bp, Arabidopsis thaliana

SEQ ID NO 28 - AtTI P9, protein, 405 aa, Arabidopsis thaliana

SEQ ID NO 29 - BnTIP9, nucleic acid molecule 1218 bp, Brassica napus

SEQ ID NO 30 - BnTIP9, protein, 405 aa, Brassica napus

SEQ ID NO 31 - AtTIPI 3, nucleic acid molecule, 4035 bp, Arabidopsis thaliana

SEQ ID NO 32 - AtTIPI 3, protein, 1344 aa, Arabidopsis thaliana

SEQ ID NO 33 - AtTIPI 5, nucleic acid molecule, 2262 bp, Arabidopsis thaliana

SEQ ID NO 34 - AtTIPI 5, protein, 753 aa, Arabidopsis thaliana

SEQ ID NO 35 - BnTIPI 5, nucleic acid molecule, 2205 bp, Brassica napus

SEQ ID NO 36 - BnTIPI 5, protein, 734 aa, Brassica napus

SEQ ID NO 37 - AtTIPI 6, nucleic acid molecule, 1449 bp, Arabidopsis thaliana

SEQ ID NO 38 - AtTIPI 6, protein, 482 aa, Arabidopsis thaliana

SEQ ID NO 39 - AtTIP28, nucleic acid molecule, 807 bp, Arabidopsis thaliana

SEQ ID NO 40 - AtTIP28, protein, 268 aa, Arabidopsis thaliana

SEQ ID NO 41 - BnTIP28, nucleic acid molecule, 819 bp, Brassica napus

SEQ ID NO 42 - BnTIP28, protein, 272 aa, Brassica napus

References The contents of the entirety of each of which are incorporated by this reference

Alvarez JP, Pekker I, Goldshmidt A, Blum E, Amsellem Z, Eshed Y (2006) Endogenous and synthetic microRNAs stimulate simultaneous, efficient, and localized regulation of multiple targets in diverse species Plant Cell 8 1 134-51

Andrade MA, Bork P (1995) HEAT repeats in the Huntmgton's disease protein Nat Genet Oct,1 1 (2) 115-6

Barbet NC, Schneider U, Helliwell SB Stansfield I ₁ Tuite MF, Hall MN (1996) TOR controls translation initiation and early G1 progression in yeast MoI Biol Cell Jan, 7(1) 25-42 Bechtold N, Ellis J, Pellefer G (1993) In planta Agroibacter/um-mediated gene transfer by infiltration of adult Arabidopsis thaliana plants C R Acad Sci Ser III Sci Vie, 316 1194-1199

Becker D, Brettschneider R, Lorz H (1994) Fertile transgenic wheat from microprojectile bombardment of scutellar tissue Plant J 5 299-307

BIa ^' zquez MA ₁ Soowal L, Lee I ₁ Weigel D (1997) LEAFY expression and flower initiation in Arabidopsis Development 124, 3835-3844

Bosotti R, lsacchi A, Sonnhammer EL (2000) FAT a novel domain in PIK-related kinases Trends Biochem Sci May, 25(5) 225-7

Clough S J , Bent A (1998) Floral dip a simplified method for Λgrobacfer/um-mediated transformation of Arabidopsis thaliana Plant J 16 735-743

Datla RS, Hammerlindl JK ₁ Panchuk B ₁ Pelcher LE, Keller W (1992) Modified binary plant transformation vectors with the wild-type gene encoding NPTII Gene 122, 383-384

Datla R, Anderson JW, Selvaraj G (1997) Plant promoters for transgene expression Biotechnology Annual Review 3 269-296

De Virgilio C ₁ Loewith R (2006) Cell growth control little eukaryotes make big contributions. Oncogene 25 6392-6415

DeBlock M, DeBrouwer D, Tenning P (1989) Transformation of Brassica napus and Brassica oleracea using Agrobactenum tumefaciens and the expression of the bar and neo genes in the transgenic plants Plant Physiol 91 694-701

Dellaporta SJ, Wood J, Hicks JB (1983) A plant DNA minipreparation Version Il Plant MoI Biol Reporter 1 19-21

Depicker A, Montagu MV (1997) Post-transcriptional gene silencing in plants Curr Opin Cell Biol 9 373-82

Deprost D ₁ Yao L, Sormani R, Moreau M, Leterreux G, Nicolai M, Bedu M, Robaglia C, Meyer C (2007) The Arabidopsis TOR kinase links plant growth, yield, stress resistance and mRNA translation EMBO Reports 8 864-870

Gangloff YG, Mueller M, Dann SG ₁ Svoboda P ₁ Sticker M, Spetz JF, Um SH, Brown EJ ₁ Cereghini S ₁ Thomas G ₁ Kozma SC (2004) Disruption of the mouse mTOR gene leads to early postimplantation lethality and prohibits embryonic stem cell development. MoI Cell Biol. N.

Helliwell CA, Waterhouse PM (2005) Constructs and methods for hairpin RNA-mediated gene silencing in plants. Methods Enzymology 392: 24-35.

Henikoff S ₁ Till BJ, Comai L (2004) TILLING. Traditional mutagenesis meets functional genomics. Plant Physiol. 135: 630-6.

Hirayama T, Onto C, Mizoguchi T, Shinozaki K (1995) A gene encoding a phosphatidylinositol-specific phospholipase C is induced by dehydration and salt stress in Arabidopsis thaliana. Proc. Natl. Acad. Sci. USA 92: 3903-3907.

lnoki K, Guan KL (2006). Complexity of the TOR signaling network. Trends Cell Biol. 2006 Apr;16(4):206-12. Epub Mar 3.

Katavic Y ₁ Haughn GW, Reed D ₁ Martin M, Kunst L (1994) In planta transformation of Arabidopsis thaliana. MoI. Gen. Genet. 245: 363-370.

Kim YJ, Kim JE, Lee JH ₁ Lee MH, Jung HW, Bahk YY ₁ Hwang BK, Hwang I, Kim WT (2004) The Vr-PLC3 gene encodes a putative plasma membrane-localized phosphoinositide- specific phospholipase C whose expression is induced by abiotic stress in mung bean (Vigna radiata L ). FEBS Lett, 556: 127-136.

Kunz J, Schneider U, Howald I, Schmidt A, Hall MN (2000) HEAT repeats mediate plasma membrane localization of Tor2p in yeast. J Biol Chem. Nov 24;275(47):3701 1-20.

Li X, Song Y, Century K, Straight S, Ronald P, Dong X ₁ Lassner M, Zhang Y (2001) A fast neutron deletion mutagenesis-based reverse genetics system for plants. Plant J. 27: 235- 242.

Loewith R, Jacinto E ₁ Wullschleger S, Lorberg A, Crespo JL, Bonenfant D, Oppliger W, Jenoe P, Hall MN (2002) Two TOR complexes, only one of which is rapamycin sensitive, have distinct roles in cell growth control. MoI Cell. Sep;10(3):457-68.

Mahfouz MM ₁ Kim S, Delauney AJ, Verma DPS (2006) Arabidopsis TARGET of RAPAMYCIN interacts with RAPTOR which regulates the activity of S6 kinase in response to osmotic stress. The Plant Cell. 18. 477-490.

Martin DE, Hall MN (2005) Current Opinion in Cell Biology. 17:158-166. Menand B, Desnos T Nussaume L, Berger F Bouchez D, Meyer C, Robaglia C (2002) Expression and disruption of the Arabidopsis TOR (target of rapamycin) gene PNAS 99 6422-6427

Meyer P (1995) Understanding and controlling transgene expression Trends in Biotechnology 13 332-337

Moloney MM, Walker JM, Sharma KK (1989) High efficiency transformation of Brassica napus using Agrobactenum vectors Plant Cell Rep 8 238-242

Munnik T (1999) Phosphatide acid an emerging plant lipid second messenger Trends in Plant Sci 6 227-233

Murakami M, lchisaka T, Maeda M, Oshiro N, Hara K, Edenhofer F, Kiyama H, Yonezawa K, Yamanaka S (2004) mTOR is essential for growth and proliferation in early mouse embryos and embryonic stem cells MoI Cell Biol Aug,24(15) 6710-8

Neddleman and Wunsch (1970) J MoI Biol 48 443

Nehra NS, Chibbar RN, Leung N, Caswell K, Mallard C, Steinhauer L, Baga M, Kartha KK (1994) Self-fertile transgenic wheat plants regenerated from isolated scutellar tissues following microprojectile bombardment with two distinct gene constructs Plant J 5 285- 297

Pearson and Lipman (1988) Proc Natl Acad Sci (U S A ) 85 2444

Potrykus L (1991) Gene transfer to plants Assessment of publish approaches and results Annu Rev Plant Physiol Plant MoI Biol 42 205-225

Pouwels et al (1986) Cloning Vectors A laboratory manual, Elsevier, Amsterdam

Powers T, Walter P (1999) Regulation of ribosome biogenesis by the rapamycin-sensitive TOR-signaling pathway in Saccharomyces cerevisiae MoI Biol Cell Apr, 10(4) 987-1000

Rhodes CA, Pierce DA, Mettler IJ, Mascarenhas D, Detmer JJ (1988) Genetically transformed maize plants from protoplasts Science 240 204-207

Sambrook J, Fritsch EF, Maniatis T (1989) Molecular Cloning A Laboratory Manual 2 ^nd edn Cold Spring Harbor Cold Spring Harbor Laboratory Press Sambrook J, Fritsch EF, Maniatis T (2001) Molecular Cloning A Laboratory Manual 3 ^rd edn Cold Spring Harbor Cold Spring Harbor Laboratory Press

Sanford JC, Klein TM, Wolf ED, Allen N (1987) Delivery of substances into cells and tissues using a particle bombardment process J Part Sci Technol 5 27-37

Schwab R, Ossowski S, Riester M, Warthmann N, Weigel D (2006) Highly specific gene silencing by artificial microRNAs in Arabidopsis Plant Ce// 18 1121-33

Shimamoto K, Terada R, Izawa T, Fujimoto H (1989) Fertile transgenic rice plants regenerated from transformed protoplasts Nature 335 274-276

Smith and Waterman (1981) Ad App Math 2 482

Songstad DD, Somers DA, Gπesbach RJ (1995) Advances in alternative DNA delivery techniques Plant Cell, Tissue and Organ Culture 40 1-15

Stam M, de Bruin R, van Blokland R, van der Hoorn RA, MoI JN Kooter JM (2000) Distinct features of post-transcπptional gene silencing by antisense transgenes in single copy and inverted T-DNA repeat loci Plant J 21 27-42

Vasil IK (1994) Molecular improvement of cereals Plant MoI Biol 5 925-937

Vergnolle C, Vaultier M-N, Taconnat L, Renou J-P, Kader J-C, Zachowski A, Ruelland E (2005) The Cold-Induced Early Activation of Phospholipase C and D Pathways Determines the Response of Two Distinct Clusters of Genes in Arabidopsis Cell Suspensions Plant Physiol 139 1217-1233

Walden R, Wingender R (1995) Gene-transfer and plant regeneration techniques Trends in Biotechnology 13 324-331

Warner JR, Vilardell J, Sohn JH (2001 ) Economics of πbosome biosynthesis Cold Spring Harb Symp Quant Biol 66 567-74

Weisman R, Choder M (2001 ) The fission yeast TOR homolog, tor1 +, is required for the response to starvation and other stresses via a conserved serine J Biol Chem Mar 9,276(10) 7027-32 Epub 2000 Nov 28

Wullschleger S, Loewith R, Hall MN (2006) TOR signaling in growth and metabolism Ce// Feb 10,124(3) 471-84 Young K (1998) Yeast two-hybrid so many interactions, (in) so little time Biol Reprod 58 (2) 302-11

Zheng XF, Florentino D, Chen J, Crabtree GR, Schreiber SL (1995) TOR kinase domains are required for two distinct functions, only one of which is inhibited by rapamycin Ce// JuI 14,82(1) 121-30

Other advantages that are inherent to the structure are obvious to one skilled in the art The embodiments are described herein illustratively and are not meant to limit the scope of the invention as claimed Variations of the foregoing embodiments will be evident to a person of ordinary skill and are intended by the inventor to be encompassed by the following claims