Jasmonic acid endogeny promoting agent, and method for promoting jasmonic acid endogeny

A method for promoting endogenous jasmonic acid production in a plant, comprising contacting the plant with a compound represented by formula (1) or a salt thereof,

• wherein in the formula (1), R1 and R2 represent, each independently, a monovalent organic group, a cyano group, a halogen atom, a hydroxy group, an amino group, a nitro group, a nitroxy group, a mercapto group, a cyanate group, a thiocyanate group, an isothiocyanate group, a sulfo group, a sulfamino group, a sulfino group, a sulfamoyl group, a phospho group, a phosphono group, or a boronyl group, wherein n R1 comprise at least a cyano group or a halogen atom;
• n represents an integer of 1 to 5,
• wherein in a case where n is 2 or more, n R1 are identical to or different from one another, and wherein two or more R1 bonded to adjacent carbon atoms optionally bond to one another to form a ring structure;
• and
• m represents an integer of 0 to 5,
• wherein in a case where m is 2 or more, m R2 are identical to or different from one another, and wherein two or more R2 bonded to adjacent carbon atoms optionally bond to one another to form a ring structure.