Pedosphere 35(1): 216--228, 2025
ISSN 1002-0160/CN 32-1315/P
©2025 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Root exudate-driven rhizospheric recruitment of plant growth-promoting rhizobacteria |
Hua LIN1, Caixing LAI1, Guo YU1,2 , Geoffrey I. SUNAHARA3, Liheng LIU1, Habib ULLAH4, Jie LIU1 |
1 College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004 (China)
2 Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084 (China)
3 Department of Natural Resource Sciences, McGill University, Montreal H3A 0G4 (Canada)
4 Department of Environmental Science, Zhejiang University, Hangzhou 310058 (China) |
| ABSTRACT |
| 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. |
| Key Words: biofilm formation,chemoattractant,chemoeffector,methyl-accepting chemotaxis proteins,rhizospheric colonization |
| Citation: Lin H, Lai C X, Yu G, Sunahara G I, Liu L H, Ullah H, Liu J. 2025. Root exudate-driven rhizospheric recruitment of plant growth-promoting rhizobacteria. Pedosphere. 35(1): 216-228. |
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