香菇草水浸提液对3种植物种子萌发和幼苗生长的化感效应  

Allelopathic effects of Hydrocotyle vulgaris extract on seed germination and seedling growth

作　　者：杨琴琴[1] 缪丽华 洪春桃[1] 王媛[1] 季梦成[1] 

机构地区：[1]浙江农林大学风景园林与建筑学院,浙江临安311300 [2]中国湿地博物馆,浙江杭州310013

出　　处：《浙江农林大学学报》2013年第3期354-358,共5页Journal of Zhejiang A&F University

基　　金：浙江省杭州市科技计划项目(20100933B18);中国湿地博物馆重点资助项目(CWM2010-W02)

摘　　要：为了探讨外来物种香菇草Hydrocotyle vulgaris的化感潜力,采用不同质量浓度香菇草叶及根水浸提液对萝卜Raphanus sativus,黄瓜Cucumis sativus和白菜Brassica chinensis等3种植物种子进行处理,观测其种子萌发和幼苗生长状况。结果表明:高质量浓度香菇草叶及根水浸提液对3种植物种子萌发具有显著的影响,种子萌发抑制率与浸提液质量浓度呈正相关。在50.0 g.L-1香菇草根水浸提液处理下,萝卜、黄瓜和白菜种子萌发抑制率分别为29.3%,14.6%和41.4%。香菇草根水浸提液对萝卜、黄瓜和白菜种子萌发后幼芽和幼根的生长均产生显著的抑制作用;50.0 g.L-1根水浸提液对萝卜、黄瓜和白菜幼芽鲜质量抑制率分别为22.1%,46.2%和34.3%,对幼根鲜质量抑制率分别为58.1%,50.2%和58.9%。香菇草叶水浸提液对种子萌发的抑制作用强于根。To understand the allelopathic potential of Hydrocotyle vulgaris and to determine the effect of the aquatic extract from its leaves and roots on seed germination and seedling growth, three plant types： radish （ Raphanus sativus ）, cucumber （ Cucumis sativus ）, and Chinese cabbage （Brassica chinensis ） were studied using 50.0 g ·L-1 leaf extract and root extract. A correlation analysis was utilized. Results showed that the aquatic root and leaf extract for high density H. vulgaris had strong （P〈0.01） allelopathic effects on seed ger- mination with the seed germination rate positively correlated to the density of the extract, with a treatment of 50.0 g·L-1 of the aquatic root extract seed germination was reduced 29.3% for radish, 14.6% for Chinese cabbage, and 41.4% for cucumber, and reduced 51.1% for radish, 39.0% for Chinese cabbage, and 100% for cucumber of the aquatic leaf extract. After germination, continue to treat with 50.0 g·L-1 of the aquatic root extract and leaf extract to test the growth of radicals and buds. Result shows that with the treatment of root extract, the fresh weight of radicals was recluced 22.1% for radish, 46.2% for Chinese cabbage, and 34.3% for cucumber, and the fresh weight of buds was reduced 58.1% for radish, 50.2% for Chinese cabbage, and 58.9% for cucumber. The leaf extract had higher inhibition rate than root on fresh weight. Thus, the aquatic leaf extract had stronger allelopathic effects than roots. [Ch, 3 tab. 15 ref.]

关 键 词：植物学 香菇草 水浸提液 化感作用 种子萌发 

分 类 号：S184[农业科学—农业基础科学] Q946[生物学—植物学]