RESUMO
Researchers have established that (+)-7-iso-jasmonic acid ((+)-7-iso-JA) is an intermediate in the production of cis-jasmone (CJ); however, the biosynthetic pathway of CJ has not been fully described. Previous reports stated that CJ, a substructure of pyrethrin II produced by pyrethrum (Tanacetum cinerariifolium), is not biosynthesized through this biosynthetic pathway. To clarify the ambiguity, stable isotope-labelled jasmonates were synthesized, and compounds were applied to apple mint (Mentha suaveolens) via air propagation. The results showed that cis-jasmone is not generated from intermediate (+)-7-iso-JA, and (+)-7-iso-JA is not produced from 3,7-dideydro-JA (3,7-ddh-JA); however, 3,7-didehydro-JA and 4,5-didehydro-7-iso-JA were converted into CJ and JA, respectively.