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Review
. 2022 Aug 11:13:875774.
doi: 10.3389/fpls.2022.875774. eCollection 2022.

Plant Growth-Promoting Rhizobacteria Eliminate the Effect of Drought Stress in Plants: A Review

Hafiz Muhammad Ahmad  1 , Sajid Fiaz  2 , Sumaira Hafeez  3 , Sadaf Zahra  1 , Adnan Noor Shah  4 , Bushra Gul  5 , Omar Aziz  6 , Mahmood-Ur-Rahman  1 , Ali Fakhar  7 , Mazhar Rafique  7 , Yinglong Chen  8 , Seung Hwan Yang  9 , Xiukang Wang  10
Affiliations
Review

Plant Growth-Promoting Rhizobacteria Eliminate the Effect of Drought Stress in Plants: A Review

Hafiz Muhammad Ahmad et al. Front Plant Sci. .

Abstract

Plants evolve diverse mechanisms to eliminate the drastic effect of biotic and abiotic stresses. Drought is the most hazardous abiotic stress causing huge losses to crop yield worldwide. Osmotic stress decreases relative water and chlorophyll content and increases the accumulation of osmolytes, epicuticular wax content, antioxidant enzymatic activities, reactive oxygen species, secondary metabolites, membrane lipid peroxidation, and abscisic acid. Plant growth-promoting rhizobacteria (PGPR) eliminate the effect of drought stress by altering root morphology, regulating the stress-responsive genes, producing phytohormones, osmolytes, siderophores, volatile organic compounds, and exopolysaccharides, and improving the 1-aminocyclopropane-1-carboxylate deaminase activities. The use of PGPR is an alternative approach to traditional breeding and biotechnology for enhancing crop productivity. Hence, that can promote drought tolerance in important agricultural crops and could be used to minimize crop losses under limited water conditions. This review deals with recent progress on the use of PGPR to eliminate the harmful effects of drought stress in traditional agriculture crops.

Keywords: drought; endosphere; microbiome; rhizosphere; soil microbes.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

FIGURE 1
FIGURE 1
Morphological, physiological, and molecular response to drought stress in plants.
FIGURE 2
FIGURE 2
Various mechanisms are adopted by PGPR to eliminate drought stress.
See this image and copyright information in PMC

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