L‐3,4‐Dihydroxyphenyla1anine(L‐DOPA)によるキュウリ幼植物の生育阻害作用の特性

Translated title of the contribution: Characteristics of Growth Inhibitory Effect of L-3, 4-Dihydroxyphenylalanine (L-DOPA) on Cucumber Seedlings.

中嶋 直子, 平舘 俊太郎, 藤井 義晴

Research output: Contribution to journalArticle

Abstract

When cucumber seeds were sown on agar containing L-3, 4-dihydroxyphenylalanine (L-DOPA), the growth of cucumber seedlings was strongly inhibited by L-DOPA immediately after sowing. However, they recovered from the inhibitory effect of L-DOPA 12 days after sowing. Throughout the experimental period, blacking of agar was observed in the medium containing L-DOPA due to chemical alteration of L-DOPA in agar associated with a polymerization reaction. In the roots of cucumber seedlings treated with L-DOPA, accumulation of L-DOPA and free amino acids was observed compared with the control. Especially, the amount of tyrosine and phenylalanine with a similar chemical structure to that of L-DOPA increased remarkably.<br>It was assumed that the increase was due to the metabolim of L-DOPA to other harmless amino acids. This transformation of L-DOPA could be one of the detoxification mechanisms responsible for the recovery from the inhibitory effects of L-DOPA.
Translated title of the contributionCharacteristics of Growth Inhibitory Effect of L-3, 4-Dihydroxyphenylalanine (L-DOPA) on Cucumber Seedlings.
Original languageJapanese
Pages (from-to)132-138
Number of pages7
Journal雑草研究
Volume44
Issue number2
DOIs
Publication statusPublished - 1999

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