16 ヒマワリ種子から分泌される新規アレロパシー物質

概要

論文の詳細を見る
A potent substance was isolated from the exudates of germinating sunflower (Helianthus annuus L.) seeds. It was identified as a stereoisomer of diversifolide, 4,15-dinor-3-hydroxy-1(5)-xanthene-12,8-olide (designated sundiversifolide) from spectra of APCI-, ESI-, and HR-MS, IR and ^<13>- and ^1H-NMR. Diversifolide, the stereoisomer of the isolated substance, has already been isolated from Mexican sunflower (Tithonia diversifolia) leaves, but its biological activity has not yet been studied as an allelopathic substance. In this study, the biological activity of the isolated substance was studied. This substance inhibited shoot and root growth of cat's-eyes by about 50% at a concentration of 30 ppm. It also showed plant species-selective activity on the shoot and root growth of the tested plants. When cat's-eyes seed were incubated together with sunflower seeds, the growth of cat's-eyes was inhibited. Furthermore, the substance was detected from the extract of river sand when sunflower seeds were incubated on the sand. These results indicate that the isolated substance in this study has some allelopathic function in sunflower plants.
植物化学調節学会の論文
2000-11-02