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PGPR-Mediated Breakthroughs in Plant Stress Tolerance for Sustainable Farming

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Abstract

Environmental stress affects food productivity by producing reactive oxygen species (ROS) that damage cell organelles and biomolecules, leading to apoptosis. Plants have developed a variety of defense responses over time to counteract the detrimental effects of biotic and abiotic stresses. However, in order to combat climate change and the deterioration of ecosystems, it will be necessary to promote the use of beneficial bacteria including plant growth-promoting bacteria (PGPR) in agricultural ecosystems. PGPR potentially improves nutrient absorption, modulates hormone levels, and/or improves tolerance to abiotic stress factors and plant pathogens. PGPR offers a sustainable replacement for conventional agrochemicals and traditional farming practices by improving plant growth and stress tolerance. In this context, studying the fundamental evolutionary and ecological relationships among plants and their microbiomes is necessary to build vital approaches to strengthen traditional agricultural techniques. Stress-tolerant PGPR can release bioactive substances such as gibberellins and indole acetic acid which participate in mitigating stresses. PGPR could minimize the adverse effect of salinity, drought, heavy metals, floods, and other stresses on plants by inducing antioxidant enzymes, like catalase, peroxidase, and superoxide dismutase. This review summarizes the current developments in the PGPR-based strategy for tackling biotic and abiotic stresses.

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Acknowledgements

The authors are grateful to the authorities of Lovely Professional University, Phagwra, Punjab for the facilities.

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Correspondence to Arun Karnwal.

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Karnwal, A., Shrivastava, S., Al-Tawaha, A.R.M.S. et al. PGPR-Mediated Breakthroughs in Plant Stress Tolerance for Sustainable Farming. J Plant Growth Regul (2023). https://doi.org/10.1007/s00344-023-11013-z

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  • DOI: https://doi.org/10.1007/s00344-023-11013-z

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