元江栲对蒲公英和凤仙花化感作用研究
摘要： 为探索化感作用对药用植物栽培的影响及化感作用对森林植被自然恢复的影响机制,研究了元江栲对蒲公英和凤仙花种子及其幼苗的化感作用。结果表明：随着元江栲水浸液浓度的增大,元江栲水浸液对蒲公英和凤仙花种子萌发、幼苗地上部分的高度、幼苗叶绿素含量、幼苗可溶性蛋白及总糖含量的抑制作用逐渐增强,但其幼苗丙二醛含量却逐渐升高。研究发现,元江栲水浸液通过增加膜脂过氧化和逆境伤害,抑制叶绿素的生成,抑制蒲公英和凤仙花种子萌发和幼苗生长,从而表现出化感作用,且化感效应随着元江栲水浸液浓度的增加而增强。研究为药用植物栽培及森林植被的人工恢复提供参考。
关键词: 化感作用, 元江栲, 蒲公英, 凤仙花
Abstract: In order to explore allelopathic effects on cultivation of medicinal plants and its mechanism of natural regeneration of forestlands, allelopathy of extract solution of Castanopsis orthacantha on seed germination and seedling growth of Taraxacum mongolicum and Impatiens balsamina was studied. The results showed that seed germination, seedling height, content of chlorophyll of seedling, content of soluble protein of seedling, content of total saccharide of seedling of T. mongolicum and I. balsamina decreased with the increasing concentration of extract solution of C. orthacantha; but MDA content of seedling of T. mongolicum and I. balsamina increased with the increasing concentration of extract solution of C. orthacantha. It was found that allelopathy of extract solution of C. orthacantha on T. mongolicum and I. balsamina occurred with content of chlorophyll and seed germination and seedling growth inhibited and the degree of membrane lipid peroxidation and stress harm strengthened, and the allelopathic effects of extract solution of C. orthacantha on T. mongolicum and I. balsamina increased with higher concentration of extract solution of C. orthacantha. So the research can shed light on cultivation of medicinal plants and man-made regeneration of forestlands.
Key words: allelopathy, Castanopsis orthacantha, Taraxacum mongolicum, Impatiens balsamina
中图分类号:
Q945.32
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