2-Methoxystypandrone, a potent phytotoxic substance in Rumex maritimus L

Md Shafiqul Islam, Arihiro Iwasaki, Kiyotake Suenaga, Hisashi Kato-Noguchi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)


Herbicide use has raised concerns which results in the need to find an alternative approach, using natural methods, of controlling weeds. Phytotoxic substances released from plants have been used to manage weeds biologically. Rumex maritimus, belonging to the Polygonaceae family, is well known to have a wide range of biological properties. However, the phytotoxic properties of R. maritimus is not well documented. Thus, we conducted an investigation into the phytotoxic potential of R. maritimus and attempted to find out its phytotoxic substances. Leaf, stem and root extracts of R. maritimus exhibited a strong inhibitory effects on root and shoot length of Lactuca sativa L., Medicago sativa L., Lolium multiflorum Lam., Phleum pratense L. With increasing extract concentration, inhibition increased. One substance, 2-methoxystypandrone, was purified after a series of chromatography and characterized by spectral data. 2-Methoxystypandrone reduced the seedling length of Lepidium sativum at concentration ≥ 3 μM. The required 50% growth inhibition concentration of Lepidium sativum seedling for 2-methoxystypandrone was ranged 5.8–11.8 μM. Therefore, it is suggested that the phytotoxic effects of R. maritimus on the test plants may be caused due to the presence of 2-methoxystypandrone.

Original languageEnglish
Pages (from-to)195-202
Number of pages8
JournalTheoretical and Experimental Plant Physiology
Issue number4
Publication statusPublished - 2017 Dec 1


  • 2-Methoxystypandrone
  • Bio-herbicide
  • Phytotoxicity
  • Rumex maritimus
  • Synthetic herbicide

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Plant Science


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