根分泌物对根际矿物营养及根际微生物的效应  

The roles of root exudation on rhizosphere nutrient and rhizosphere microorganisms

作　　者：刘洪升[1] 宋秋华[1] 李凤民[1] 

机构地区：[1]兰州大学干旱农业生态国家重点实验室,兰州730000

出　　处：《西北植物学报》2002年第3期693-702,共10页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家重点基础研究发展规划资助项目 ( D2 0 0 0 1 86 0 3);国家自然科学基金项目 ( 39970 1 4 8)

摘　　要：综述了根系分泌物对植物生长的生理生态学效应 ,并就根系分泌物的定义、产生机制、组成成分和影响因素等方面进行了讨论。指出根系分泌物在缓解低矿物营养胁迫对植株造成的伤害及决定根际微生物的种群密度和数量方面起着重要的作用 ;根系分泌物的产生机制多样 ,组成成分复杂 ,影响因素繁多。The studies on root exduation and their physiological ecology roles were summarized,with emphasis on relationship between root exudation and nutrient deficiency and rhizosphere microorganisms.The results indicated that root have many mechanisms to exudate organism and non-organism compounds to environment and there have many factors influencing the total number of root exudates and their compounds are very complex.Root exudates play an important role in relieving nutrient deficiency and determining the number of rhizosphere bacteria.Further studying the root exduates and their physiological ecology roles will benefit to better understanding the physiology and biochemistry process occurred between plant and soil and their regulation in depth.

关 键 词：根分泌物 根际矿物营养 根际微生物 

分 类 号：Q945.12[生物学—植物学]