植物根系分泌物在植物中的作用

摘要

论述了根系分泌物的种类及根系分泌物在植物中的重要作用.根系分泌物对植物营养有调节作用.在所有的根分泌物中,专一性分泌物对植物营养的调节作用尤为显著.根系分泌物的化感作用对抑制杂草生长有一定作用.根系分泌物中自毒成分的积累可能是引起连作障碍的重要因素.同时,根系分泌物使根际微生物的数量远远超过非根际微生物的数量,从而间接影响了植物的生长.%The varieties and the functions of root exudates in plant were reviewed. Root exudales can accommodate plant nutrition. In all root exu-dates,special root exudates are most important to plant nutrition. The allelochemicals of root exudates restrains the growing of weed. The accumulation of autotoxicity maybe arouse continuous cropping obstacle. Meanwhile, the quantity of soil borne microorganism in rhizosphere soil is much more than the quantity of that in un - rhizosphere soil under the root exudates,which influence the growth of plant indirectly.