A species-selective allelopathic substance from germinating sunflower (Helianthus annuus L.) seeds

Shuji Ohno, Kaori Tomita-Yokotani, Seiji Kosemura, Mari Node, Toshisada Suzuki, Midori Amano, Kazuomi Yasui, Toshio Goto, Shosuke Yamamura, Koji Hasegawa

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)


From the exudate of germinating sunflower(Helianthus annuus L.) seeds was isolated a stereoisomer of diversifolide, 4. 15-dinor-3-hydroxy-1(5)-xanthene-12.8-olide (designated sundiversifolide) as determined by analysis of its IR, APCI-, ESI- and HR-MS and 13C and 1H NMR spectra. This substance inhibited shoot and root growth of cat's-eyes by about 50% at a concentration of 30 ppm. It also showed species-selective activity on the shoot and root growth of tested plants. When cat's-eyes seeds were incubated together with sunflower seeds, the cat's-eyes growth was inhibited. Furthermore, it was detected from an extract of river sand when sunflower seeds were incubated on the sand. These results indicate that sundiversifolide has an allelopathic function in sunflower plants.

Original languageEnglish
Pages (from-to)577-581
Number of pages5
Issue number6
Publication statusPublished - 2001 Mar 23


  • 4.15-Dinor-3-hydroxy-1(5)-xanthene-12.8-olide
  • Allelopathic substance
  • Compositae
  • Growth inhibitor
  • Helianthus annuus L.
  • Sundiversifolide

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Plant Science
  • Horticulture


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