Survey of Japanese weeds and crops for the detection of water-extractable allelopathic chemicals using RICHARDS' function fitted to lettuce germination test.

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  • FUJII Yoshiharu
    National Institute of Agro-Environmental Sciences
  • SHIBUYA Tomoko
    National Institute of Agro-Environmental Sciences
  • YASUDA Tamaki
    National Institute of Agro-Environmental Sciences National Research Institute of Vegetables, Ornamental Plants, and Tea

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  • 発芽・生育試験による雑草・作物からの他感作用植物の検索
  • ハツガ セイイク シケン ニ ヨル ザッソウ サクモツ カラ ノ タカン サヨ

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Abstract

We tested 70 plant species collected in the central part of Japan for the presence of water extractable allelochemicals using a screening method based on Richards' function, fitted to lettuce seed germination and growth test. The parameters for the germination tests included, final germination percentage (A), germination rate (R), and the onset of germination (Ts).<br>The plants with allelolopathic activities included, Solidago altissima, Artemisia princeps, Helianthus anuus, Pueraria lobata, Secale cereale, which were reported previously, in addition to, Mucuna prurience, Phytolacca americana, Houttuynia cordata, Colocasia esculenta known as oriental medicinal plants.<br>The analysis based on RICHARDS' function revealed some of the mechanisms of action of these plant extracts, and the method was considered to be useful for the screening of plants with allelopathic properties.

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