Abstract
In this recent era, several approaches have been developed to alleviate the adverse effects of salinity stress in different plants. However, some of them are not eco-friendly. In this context, evolving sustainable approaches which enhance the productivity of saline soil without harming the environment are necessary. Many recent studies showed that plant growth-promoting rhizobacteria (PGPR) are known to confer salinity tolerance to plants. Salt-stressed plants inoculated with PGPR enhance the growth and productivity of crops by reducing oxidative damage, maintaining ionic homeostasis, enhancing antioxidant machinery, and regulating gene expressions. The PGPR also regulates the photosynthetic attributes such as net photosynthetic rate, chlorophyll, and carotenoid contents and enhances the salinity tolerance to plants. Moreover, PGPR has a great role in the enhancement of phytohormones and secondary metabolites synthesis in plants under salt stress. This review summarizes the current reports of the application of PGPR in plants under salt stress and discusses the PGPR-mediated mechanisms in plants of salt tolerance. This review also discusses the potential role of PGPR in cross-talk with phytohormones and secondary metabolites to alleviate salt stress and highlights the research gaps where further research is needed.
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References
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MSR and MB conceived the idea for the article. The first draft of the manuscript was written by MNH, AH, SI, NCP, MFM, MMRS, JMB, FSD, and MAH. MSR, MB, and WY revised critically for important intellectual content and gave substantive support. All authors read and approved the final manuscript.
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Hoque, M.N., Hannan, A., Imran, S. et al. Plant Growth-Promoting Rhizobacteria-Mediated Adaptive Responses of Plants Under Salinity Stress. J Plant Growth Regul 42, 1307–1326 (2023). https://doi.org/10.1007/s00344-022-10633-1
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DOI: https://doi.org/10.1007/s00344-022-10633-1