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植物根系分泌物的生态效应
引用本文:史刚荣.植物根系分泌物的生态效应[J].生态学杂志,2004,23(1):97-101.
作者姓名:史刚荣
作者单位:淮北煤炭师范学院生物科学系,淮北,235000
基金项目:安徽省教育厅自然科学基金项目 ( 2 0 0 3kj189)资助
摘    要:根系分泌物是在一定的生长条件下 ,活的且未被扰动的根系释放到根际环境中的有机物质的总称 ,在植物主动适应和抵御不良环境中具有重要作用 :(1)通过化感作用影响根际微生物和周围其它植物的生长 ,并进一步改善植物的生态环境 (生物因素 ) ;(2 )通过对土壤中矿质元素的溶解、螯合作用、迁移和活化等作用 ,不仅在营养缺乏的情况下提高矿质营养元素的有效性 ,而且在面临重金属胁迫时能降低根际中金属污染物的活性 ,减少植物对金属的吸收。根系分泌物在植物与环境的相互作用中起着传递信息的作用

关 键 词:根系分泌物  根际微生物  化感作用  环境胁迫
文章编号:1000-4890(2004)01-0097-05

Ecological effects of plant root exudates
SHI Gangrong.Ecological effects of plant root exudates[J].Chinese Journal of Ecology,2004,23(1):97-101.
Authors:SHI Gangrong
Abstract:Root exudates, which can be called as a joint name of organic chemicals in rhizospheric environment released by living and undisturbed root system in certain stage of growth of plants, play very important roles in plants to adapt and resistant to environment stresses actively:(1)By the way of allelopathy, root exudates could affect the growth of rhizospheric microorganisms and other plants, and improve the biological factors of ecological environment;(2) By dissolving, chelating, transferring, and activating mineral elements of the soil, root exudates could not only enhance the validity of the mineral elements under circumstances of inanition, but also depress the activity of mineral contaminations in rhizosphere to reduce ion absorption in face of heavy metal stresses. Root exudates act as the information transmitter in the interactions between plants and their environment.
Keywords:root exudates  rhizospheric microorganisms  allelopathy  environment  stresses  
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