Research progress and prospect on the interaction between plant root exudates and rhizosphere microorganisms under drought stress
Drought is a major abiotic stress that restricts agricultural production.It not only limits the growth and development of crops,but also affects the delicate balance between plants,rhizosphere microorganisms and root exudates,which is crucial for plant growth and soil health.Therefore,in-depth study of the complex relationship between the three under drought stress will provides scientific ba-sis and technical support for sustainable agricultural development and national food security production.In this paper,the research re-sults on the exudative components and contents of root exudates and the differential changes of rhizosphere microbial communities after drought stress in plants both domestically and internationally were summarized.The recruitment of beneficial microorganisms by root exudates in response to drought stress was analyzed.The mechanism and physiological process of plant growth-promoting rhizobacteria to help plants improve drought tolerance were discussed.The interaction and mutual feedback relationship among host plants,root exu-dates and rhizosphere microorganisms under drought stress were summarized.On this basis,the changing patterns of root exudates un-der drought stress,the mechanism of plant drought tolerance,and the key scientific issues and research prospects of the effects of root exudates on rhizosphere microorganisms were proposed,aiming to provide theoretical basis and references for studying and applying methods to improve rhizosphere microbial communities in order to enhance plant drought resistance.
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