Plant growth inhibitory activity of the extracts of acmella oleracea and its growth inhibitory substances

Hisashi Kato-Noguchi, Prapaipit Suwitchayanon, Sutjaritpan Boonmee, Arihiro Iwasaki, Kiyotake Suenaga

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7 Citations (Scopus)


Aqueous methanol extracts of Acmella oleracea inhibited the growth of roots and shoots of cress (Lepidum sativum), lettuce (Lactuca sativa), Italian ryegrass (Lolium multiflorum), and barnyard grass (Echinochloa crus-galli) with the extract concentration-dependent manner. The extracts were then purified and 2 growth inhibitory substances were isolated and identified by spectral data as (E,E)-2,4-undecadien-8,10-diynoic acid isobutylamide (compound 1) and nona-(2Z)-en-6,8-diynoic acid 2-phenylethylamide (compound 2). Compound 1 inhibited the growth of cress roots and shoots at concentrations greater than 0.3 mM and that of barnyard grass root at concentrations greater than 0.03 mM. Compound 2 inhibited the growth of cress shoots and barnyard grass roots at concentrations greater than 1 mM. The inhibition on the seedling growth indicates that both compounds had growth inhibitory activity and may contribute to the inhibitory effect of A. oleracea extracts. This is the first report of having growth inhibitory activity of compounds 1 and 2 on plants.

Original languageEnglish
JournalNatural product communications
Issue number6
Publication statusPublished - 2019


  • Acmella oleracea
  • Allelopathic activity
  • Growth inhibition
  • Natural product
  • Spilanthes acmella

ASJC Scopus subject areas

  • Pharmacology
  • Plant Science
  • Drug Discovery
  • Complementary and alternative medicine


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