69 糸状菌由来のヤセウツボ種子発芽阻害物質

概要

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Root parasitic plants, Striga spp. and Orobanche spp., are economically important and noxious weeds on cereal and legume crops. We isolated three fungi (Y-1,Y2,Y-3) inhibiting Orobanche minor seed germination in preliminary bioassays. All of extracts from the culture broth demonstrated high inhibitory activity on seed germination. In this study, the purification, structural elucidation and evaluation of inhibitory activity are described. Two inhibitors produced by Y-2 were isolated from EtOAc-soluble-fraction of its culture broth by chromatographic separations. Their structures were determined as 4,15-diacetoxyscirpenol and 4,15-diacetynivalenol based on their ^1H-NMR, ^<13>C-NMR and GC/MS spectroscopic data. In bioassays, these compounds completely inhibited seed germination at 0.5 ppm.
植物化学調節学会の論文
2002-10-31