Allelopathic potential and chemical composition of rhinacanthus nasutus extracts

Pukclai Piyatida, Kiyotake Suenaga, Hisashi Kato-Noguchi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Aqueous methanol extracts of Rhinacanthus nasutus (L.) Kurz inhibited the shoot and root growth of cress (Lepidum sativum L.), lettuce (Lactuca sativa L.), alfalfa (Medicago sativa L.), timothy (Phleum pratense L.), Italian ryegrass (Lolium multiflorum Lam) and crabgrass (Digitaria sanguinalis L.) at concentrations > 0.1 g dry weight equivalent extract/mL and the inhibition increased with increasing extract concentration. These results suggest that the extract of R. nasutus may possess allelopathic activity. An active substance was then isolated and determined by 1H-, 13C-NMR and MS as 4-hydroxy-3-methoxybenzoic acid (vanillic acid). This is the first report of finding the vanillic acid in R. nasutus. The concentrations required for 50% growth inhibition of cress and lettuce were about 470 - 800 μM and the concentrations required for 50% growth inhibition of timothy and Italian ryegrass were 0.17 - 8.2 μM, which suggest that effectiveness of vanillic acid on timothy and Italian ryegrass was much greater than on cress and lettuce. The inhibitory activity and the occurrence of vanillic acid in R. nasutus suggest that vanillic acid may play an important role in the allelopathic properties of R. nasutus. The information obtained could be utilized in the development of bioherbicide for future weed management.

Original languageEnglish
Pages (from-to)207-216
Number of pages10
JournalAllelopathy Journal
Volume26
Issue number2
Publication statusPublished - 2010 Oct

Fingerprint

vanillic acid
Lolium multiflorum
chemical composition
lettuce
extracts
growth retardation
Digitaria sanguinalis
Phleum pratense
biopesticides
allelopathy
Lactuca sativa
Medicago sativa
weed control
alfalfa
root growth
methanol
shoots
acids
water

Keywords

  • Allelopathy
  • Rhinacanthus nasutus
  • Vanillic acid
  • Weed management

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science

Cite this

Allelopathic potential and chemical composition of rhinacanthus nasutus extracts. / Piyatida, Pukclai; Suenaga, Kiyotake; Kato-Noguchi, Hisashi.

In: Allelopathy Journal, Vol. 26, No. 2, 10.2010, p. 207-216.

Research output: Contribution to journalArticle

Piyatida, Pukclai ; Suenaga, Kiyotake ; Kato-Noguchi, Hisashi. / Allelopathic potential and chemical composition of rhinacanthus nasutus extracts. In: Allelopathy Journal. 2010 ; Vol. 26, No. 2. pp. 207-216.
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