Effect of phenolic compounds on the germination of six weeds species

Low molecular weight phenolic compounds have been identified in fresh leaves and in soils in which leaves of five varieties of Capsicum annuum L. were decomposing. Six phenolic compounds were tested in laboratory bioassays for their allelopathic effects on germination and seedling growth of six weed...

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Bibliographic Details
Published in:Plant growth regulation 1999-06, Vol.28 (2), p.83-88
Main Authors: Reigosa, M.J, Souto, X.C, Gonzalez, L
Format: Article
Language:English
Subjects:
Acids
allelochemicals
Amaranthus retroflexus
Bioassays
Biological and medical sciences
Biological control and other methods
Capsicum annuum
chemical constituents of plants
Chenopodium album
Cirsium
coumaric acids
dose response
ferulic acid
Fundamental and applied biological sciences. Psychology
gallic acid
inhibition
Leaves
Molecular weight
Parasitic plants. Weeds
phenolic acids
phenolic compounds
Phenols
Phytopathology. Animal pests. Plant and forest protection
Plantago lanceolata
regulation
Rumex crispus
seed germination
seedling growth
Seedlings
Solanum nigrum
vanillic acid
vanillin
weed biology
Weeds
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Summary:Low molecular weight phenolic compounds have been identified in fresh leaves and in soils in which leaves of five varieties of Capsicum annuum L. were decomposing. Six phenolic compounds were tested in laboratory bioassays for their allelopathic effects on germination and seedling growth of six weeds. Ferulic acid, gallic acid, p-coumaric acid, p-hydroxybenzoic acid, vanillic acid, and p-vanillin were bioassayed in concentrations of 10, 1, 0.1, and 0.01 mM. Equimolar mixtures containing all these phenolics were prepared at the final total concentration of 10, 1, 0.1, and 0.01 mM to test for possible interactive effects. Chenopodium album L., Plantago lanceolata L., Amaranthus retroflexus L., Solanum nigrum L., Cirsium sp. and Rumex crispus L. were the selected target weeds. The highest concentration of the compounds inhibited the germination of all these weeds, but lower concentrations had no effect or were stimulatory. However, effects varied with the weed species, the concentration of the compound tested and the compound itself. In assays with the mixture of phenolics we found evidence of some additive effects.
ISSN:0167-6903
1573-5087
DOI:10.1023/A:1006269716762