C-28 エンバクのファイトアレキシン生合成に関与する酵素活性のエリシターによる誘導

概要

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Oat phytoalexins, avenanthramides, were induced by the treatment with penta-N-acetylchitopentaose. The induction was proceeded by an increase in enzyme activities of phenylalanine ammonia lyase(PAL), cinnamate 4-hydroxylase (C4H) and 4-coumarate: CoA ligase(4CL). The dependency on elicitor concentraton of induced enzyme activities was well correlated with that of avenanthramide induction. Among tested oligo-N-acetylchitooligosaccharides, tetra-and pentasaccharides strongly induced these enzyme activities as well as avenanthramide production.These findings indicate that PAL, C4H and 4CL activities are involved in biosymthesis of avenanthramides and that accumulation of avenanthramides is the result from activation of de novo synthesis.
植物化学調節学会の論文
1998-10-01