假臭草根系分泌物化感作用初步研究  

Allelopathic Potential of the Root Exudates from Praxelis clematidea

作　　者：易晓洁[1,2] 陈秋波[1] 杨礼富[1] 袁坤[1] 钟淦彬[1,3] 王真辉[1] 

机构地区：[1]中国热带农业科学院橡胶研究所农业部橡胶树生物学重点开放实验室,海南儋州571737 [2]海南大学环境与植物保护学院,海南儋州571737 [3]海南大学农学院,海南儋州571737

出　　处：《热带作物学报》2010年第7期1200-1205,共6页Chinese Journal of Tropical Crops

基　　金：国家自然科学基金项目(30960088)资助

摘　　要：利用直接树脂吸收法来收集假臭草(Praxelis clematidea)根系分泌物,并对飞机草(Eupatorium odoratum)、胜红蓟(Ageratum conyzoides)、牛筋草(Eleusine indica)、三叶鬼针草(Bidens pilosa)、热研2号柱花草(Stylosanthes guianensis cv.Reyan No.2)和水稻(Oryza sativa)6种受体植物种子进行发芽试验和幼苗生长试验的测定。结果表明,假臭草根系分泌物对这6种受体植物均具有化感作用,但受体植物之间的作用表现差异显著。其中,胜红蓟发芽和水稻幼苗生长对假臭草根系分泌物最敏感。The root exudates of Praxelis clematidea were collected by a direct resin absorption and their effects on the seed germination and seedling growth of six receiver plant species were investigated. The results indicated that P. clematidea root exudates showed allelopathic potentials on all of the six target plants but there were significant differences among the plant species. Seed germination of Ageratum conyzoides was sensitive to the root exudates of praxelis, while seedling growth of Oryza sativa was sensitive to them.

关 键 词：假臭草 根系分泌物 化感作用 

分 类 号：S451[农业科学—植物保护]