open access

https://hdl.handle.net/2115/44675

Biosynthesis of jasmonic acid in a plant pathogenic fungus, Lasiodiplodia theobromae

英語

Octadecanoid pathway

2010-12

Elsevier

Phytochemistry

71(17-18)

2019-2023

Jasmonic acid (JA) is a plant hormone that plays an important role in a wide variety of plant physiological processes. The plant pathogenic fungus, Lasiodiplodia theobromae also produces JA; however, the biosynthesis of JA in this fungus has yet to be explored. A feeding experiment incorporating 13C-labeled sodium acetate.[1-13C] and [2-13C]-into L. theobromae revealed that JA in this fungus originates from a fatty acid synthetic pathway. The methyl ester of 12-oxo-phytodienoic acid (OPDA) was detected in the culture extracts of L. theobromae by GC-MS analysis. This finding indicates the presence of OPDA (a known intermediate of JA biosynthesis in plants) in L. theobromae. 2H-NMR spectral data of JA produced by L. theobromae with the incorporation of [9,10,12,13,15,16-2H6]linolenic acid showed that five deuterium atoms remained intact. In plants, this is speculated to arise from JA being produced by the octadecanoid pathway. However, the observed stereoselectivity of the cyclopentenone olefin reduction in L. theobromae was contrary to that observed in plants. These data suggest that JA biosynthesis in L. theobromae is similar to that in plants, but differing in the facial selectivity of the enone reduction.

学術雑誌論文

Accepted Manuscript

0031-9422