Allelopathy of Ageratum conyzoides Ⅲ Allelopathic effects of volatile oil from Ageratum on plants under different nutrient levels

Abstract

Abstract: Allelopathic effects of the volatile oils from Ageratum conyzoides on radish, mungbean and ryegrass under different nutrient levels of Hoagland solution were studied. The results showed that with the decrease of nutrient level, the allelopathic effects of the volatile oil increased significantly. Under the impact of the volatile oil, the contents of chlorophyll, soluble proteins and the activity of PODin three plant species were decreased, while the relative plasma membrane permeability and the content of MDA increased. The chemical components and relative contents of the volatile oil from Ageratum conyzoides were analyzed by GC/MS. Sixteen compounds were identified, and precoceneⅡ, precoceneⅠand caryophyllene are the main components, with relative amount of 36.85%, 26.41% and 19.84%, respectively.

Key words: Volatile oil of Ageratum conyzoides, Allelopathy, Nutrient level, Chemical components

Xu Tao, Kong Chuihua, Hu Fei . Allelopathy of Ageratum conyzoides Ⅲ Allelopathic effects of volatile oil from Ageratum on plants under different nutrient levels[J]. Chinese Journal of Applied Ecology, 1999, 10(6): 748-750.

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