To efficiently obtain the subject product useful as a raw material for medicines, cosmetics, as a pigment for foods, etc., by culturing the tissues or cells of a specific plant belonging to the order Polemoniales, etc., in a culture medium containing a coronatine compound, its producing microorganism, etc., and subsequently recovering the metabolite.

This method for producing the secondary metabolite of a plant comprises culturing the tissues or cells of a plant belonging to the order Polemoniales, Rubiales, Boraginales, Ranunculales, Ranunculales, Cucurbitales, Cornales, Cornales, Chenopodiales, Amaryllidales, Euphorbiales or Liliales in a culture medium containing a coronatine compound of the formula [R1 is OH, OR2 (R2 is a 1-6C alkyl, a hydrocarbon residue), OM1 (M1 is an alkali metal, an alkaline earth metal, NH4), NR3aR3b R3a, R3b are each H, a 1-6C acyl, a 1-6C alkyl, an amino acid residue, etc.,), etc.; R10a, R10b, R11a, R11b, R12, R13, R14a, R14b, R15a, R15b, R16a, R16b, R17 are each H, OH, a 1-6C alkyl, a 1-6C alkoxy], etc., its producing microorganism, a microorganism culture solution therefor or a culture solution extract therefrom, etc., and subsequently recovering the metabolite from the culture product.