41 クレス発芽種子から分泌される新規アレロパシー物質レピジモイド(口頭発表の部)

概要

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Lepidimoide(1) was isolated as a novel allelopathic substance, which promoted the shoot growth of different plant species but inhibited the root growth, from mucilage of germinated cress (Lepidium sativum L.) seeds. For example, lepidimoide promoted the hypocotyl growth of etiolated Amaranthus caudatus L. at concentrations higher then 3μM and inhibited the root growth at concentrations higher than 100μM. The growth-promoting activity in hypocotyls was 20 or 30 times as much as that of gibberellic acid (GA_3). The structural study of lepidimoide, with spectral analyses and some chemical evidence, has showed that lepidimoide 1 is regarded as the uronic acid derivative bearing an α, β-unsaturated carboxylate bonded to rhamnose via α-glucoside linkage. Thus, the intriguing structure as well as its unique biological activity prompted us to determine the absolute configuration of lepidimoide(1), by total synthesis. In this meeting we wish to report a biological activity, isolation, structural determination, total synthsis and absolute configuration of lepidimoide 1 and the structure-activity relationships of lepidimoide analogues.
天然有機化合物討論会の論文
1993-09-10