Allelopathy of oats. I. Assessment of allelopathic potential of extract of oat shoots and identification of an allelochemical

Hisashi Kato-Noguchi, Seiji Kosemura, Shosuke Yamamura, Junya Mizutani, Koji Hasegawa

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

The allelopathic potential of oat (Avena sativa L.) extracts was investigated under laboratory conditions. The ethyl ether-, acetone-, and water-soluble fractions obtained from the extract of oat shoots inhibited the germination and growth of roots and hypocotyls of lettuce (Lactuca sativa L.). The inhibitory activity of the water-soluble fraction was maximum, followed by that of ethyl ether-soluble and acetone-soluble fraction. An active principle of the water-soluble fraction was isolated and its structure was determined by spectral data as l-tryptophan. l-Tryptophan inhibited the growth of hypocotyls and roots of lettuce seedlings at concentrations greater than 0.03 and 0.1 mM, respectively. These results suggested that l-tryptophan may be an allelochemical which affects the growth or germination of different plant species.

Original languageEnglish
Pages (from-to)309-314
Number of pages6
JournalJournal of Chemical Ecology
Volume20
Issue number2
DOIs
Publication statusPublished - 1994 Feb

Keywords

  • Allelochemical
  • Avena sativa
  • Lactuca sativa
  • l-tryptophan
  • lettuce
  • oat
  • phytotoxicity

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Biochemistry

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