Abstract
Of the aglycone flavonoids identified in the exudate of cistus ladanifer, two, the flavone apigenin-4′-(O)-methyl and the flavonol kaempferol-3,7-di(O)-methyl inhibit development of the seedlings of Rumex crispus at 0.5 and 1 mM. Additive effects were observed between the major flavonols of the exudate kaempferol-3-(O)-methyl and kaempferol-3,7-di-(O)-methyl in inhibiting the size of the cotyledons and delaying the germination and cotyledon emergence. The presence of apigenin-4′-(O)-methyl, kaempferol3,7-di-(O)-methyl, and kaempferol-3-(O)-methyl was detected in the soils associated with C. ladanifer during the summer and autumn months. That these compounds are present in the soil and are not restricted to the leaves provides support for the hypothesis that C. ladanifer has allelopathic potential.
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Chaves, N., Sosa, T. & Escudero, J.C. Plant Growth Inhibiting Flavonoids in Exudate of Cistus ladanifer and in Associated Soils. J Chem Ecol 27, 623–631 (2001). https://doi.org/10.1023/A:1010388905923
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DOI: https://doi.org/10.1023/A:1010388905923