To promote growth,terrestrial plants release photosynthetic products into the rhizosphere in the form of root exudates through their root systems.Under the attraction of root exudates,plant growth-promoting rhizobacte...To promote growth,terrestrial plants release photosynthetic products into the rhizosphere in the form of root exudates through their root systems.Under the attraction of root exudates,plant growth-promoting rhizobacteria(PGPR)colonize the rhizosphere to stimulate plant growth and/or suppress the growth of pathogenic microorganisms.The rhizospheric recruitment of PGPR,as well as the establishment of root-microbe interactions,is initiated by chemotaxis towards root exudates.Over the past several decades,scientists have made notable strides in identifying representative chemoeffectors in root exudates,as well as the corresponding chemoreceptors.We review here the most recent developments in rhizospheric chemotaxis,particularly the chemoeffectors in root exudates,the structural and functional characterization of methyl-accepting chemotaxis proteins of PGPR,and the impacts of rhizospheric chemotaxis on root colonization,biofilm formation,and other root-microbe interactions during recruitment.Finally,we propose several perspectives that aim to fully unlock the potential of PGPR as bioinoculants in sustainable agriculture.展开更多
基金sponsored by the National Science Foundation of China(Nos.52200189,52230006,and 32271700)the Guangxi Science and Technology Project,China(Nos.2021GXNSFBA220055,2020GXNSFAA297256,and Guike AB21220049)+2 种基金the Guangxi Key Laboratory of Environmental Pollution Control Theory and TechnologyGuangxi Engineering Research Center of Comprehensive Treatment for Agricultural Non-Point Source PollutionModern Industry College of Ecology and Environmental Protection from Guilin University of Technology,China for support。
文摘To promote growth,terrestrial plants release photosynthetic products into the rhizosphere in the form of root exudates through their root systems.Under the attraction of root exudates,plant growth-promoting rhizobacteria(PGPR)colonize the rhizosphere to stimulate plant growth and/or suppress the growth of pathogenic microorganisms.The rhizospheric recruitment of PGPR,as well as the establishment of root-microbe interactions,is initiated by chemotaxis towards root exudates.Over the past several decades,scientists have made notable strides in identifying representative chemoeffectors in root exudates,as well as the corresponding chemoreceptors.We review here the most recent developments in rhizospheric chemotaxis,particularly the chemoeffectors in root exudates,the structural and functional characterization of methyl-accepting chemotaxis proteins of PGPR,and the impacts of rhizospheric chemotaxis on root colonization,biofilm formation,and other root-microbe interactions during recruitment.Finally,we propose several perspectives that aim to fully unlock the potential of PGPR as bioinoculants in sustainable agriculture.
