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Allelopathy of yellow fieldcress (Rorippa sylvestris): Identification and characterization of phytotoxic constituents.

08:00 EDT 1st May 1992 | BioPortfolio

Summary of "Allelopathy of yellow fieldcress (Rorippa sylvestris): Identification and characterization of phytotoxic constituents."

Both the neutral and acidic fractions of the acetone extract of yellow fieldcress (Kireha-inugarashi,Rorippa sylvestris Besser) inhibited lettuce seed germination. Salicylic,p-hydroxybenzoic, vanillic, and syringic acid were identified in the acidic fraction. In the neutral fraction, hirsutin (8-methylsulfinyloctyl isothiocyanate), 4-methoxyindole-3-acetonitrile, and pyrocatechol were identified. Bioassay using a root exudate recirculating system showedR. sylvestris during flowering inhibited the lettuce seedling growth. Hirsutin (13μg/plant/day) and pyrocatechol (9.3μg/plant/day) were the major compounds released into the rhizosphere. Several combinations of pyrocatechol,p-hydroxybenzoic acid, vanillic acid, and hirsutin reduced lettuce seedling growth. These compounds seemed to be allelochemicals.

Affiliation

Department of Agricultural Chemistry, Faculty of Agriculture, Hokkaido University, 060, Sapporo, Japan.

Journal Details

This article was published in the following journal.

Name: Journal of chemical ecology
ISSN: 1573-1561
Pages: 683-691

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