Allelopathic Autotoxicity Effects of Mikania micrantha H. B. K and Its Ecological Significance

doi:10.7668/hbnxb.2009.S2.049

Abstract

Abstract: The allelopathic autotoxicity is a chemical interaction among intra-specific plant individuals. It is a mechanism of the plant to avoid competitions that acquired through a long time of adapting environment and evaluating selection. The allelopathic autotoxicity of 4 solvent extraction from overground part and root of Mikania micrantha H. B. K was studied. The seedlings of Mikania micrantha H. B. K were cultured in solution with special concentration of nutrient solution and 4 solvent extraction 12 days. The results showed :4 solvent extraction from overground part and root had different inhibition rate of its seedling growth and synthetic inhibitory effect had homologous consistency of overground part and root from Mikania micrantha H. B. K. The synthetic inhibitory effect of 4 solvent extraction followed the order: ethyl acetate>alcohol>aqueous>n-hexane.4 solvent extraction from overground part and root have different inhibition rate of growth on weight, shoots and roots to seedling of Mikanla micrantha H. B. K, the synthetic inhibitory effect followed the order:shoots>roots>weight and the inhibition rate of overground part higher than root.

Key words: Mikania micrantha H. B. K, Allelopathic autotoxicity, Intraspecific competition

CLC Number:

S451

XU Gao-feng, ZHANG Fu-dou, LI Tian-lin, ZHANG Yun, ZHANG Yu-hua. Allelopathic Autotoxicity Effects of Mikania micrantha H. B. K and Its Ecological Significance[J]. ACTA AGRICULTURAE BOREALI-SINICA, doi: 10.7668/hbnxb.2009.S2.049.

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