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生态学杂志 ›› 2004, Vol. ›› Issue (1): 97-101.

• 专论与综述 • 上一篇    下一篇

植物根系分泌物的生态效应

史刚荣   

  1. 淮北煤炭师范学院生物科学系, 淮北, 235000
  • 收稿日期:2002-05-31 修回日期:2003-03-28 出版日期:2004-02-10
  • 通讯作者: 史刚荣,男,1968年生,甘肃陇西人,硕士,副教授,研究方向为植物生态学与物种生物学,发表论文20余篇.
  • 基金资助:
    安徽省教育厅自然科学基金项目(2003kj189)资助

Ecological effects of plant root exudates

SHI Gangrong   

  1. Department of Biology, Huaibei Coal Industry Teachers'College, Huaibei 235000, China
  • Received:2002-05-31 Revised:2003-03-28 Online:2004-02-10

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: 分布式水文模型, 森林流域, 降雨-径流过程, 尺度转换

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.

Key words: Distributed hydrological model, Forested watershed, Rainfall-runoff process, Scaling

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