Allelopathic substance exuded from a serious weed, germinating barnyard grass (Echinochloa crus-galli L.), roots

T. Yamamoto, K. Yokotani-Tomita, S. Kosemura, S. Yamamura, K. Yamada, K. Hasegawa

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The allelopathy of a serious weed, barnyard grass (Echinochloa crus-galli L.), was investigated. Root exudates of young barnyard grass showed allelopathic effects and plant-selective activity and inhibited root elongation of all plants tested. With respect to shoot growth, the exudates did not show inhibition of barnyard grass only. The allelopathic substance was isolated and identified as p-hydroxymandelic acid by NMR. pHydroxymandelic acid strongly inhibited shoot growth and root elongation of all plants tested. The effects of three congeners of p-hydroxymandelic acid were tested on rice shoot growth. In the biological activity exhibited in rice, shoot growth was related to the hydroxyl groups.

Original languageEnglish
Pages (from-to)65-67
Number of pages3
JournalJournal of Plant Growth Regulation
Volume18
Issue number2
DOIs
Publication statusPublished - 1999 Jan 1

Keywords

  • Allelopathic substance
  • Allelopathy
  • Barnyard grass (Echinochloa crus-galli L.)
  • P-Hydroxymandelic acid
  • Plant growth regulator
  • Root exudate

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

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