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Bangladesh Agricultural University (BAU)

Publish Date: 22 Sep 2022

The PGPR Mechanisms of Salt Stress Adaptation and PlantGrowth Promotion

Dr. A K M Mominul Islam

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Worldwide crop productivity hampers severely due to the adverse effects of salinity.Global warming causes a rapid escalation of the salt-affected area, and new agricultural land isaffected through saltwater intrusion. The ever-growing human population impulses to utilizethe saline area for crop cultivation to ensure food security. Salinity resistance crops could be apromising substitute but with minor success because inappropriate tactics on saline soil managementresulted in unsatisfactory yield. Salt-tolerant plant growth-promoting rhizobacteria (ST-PGPR) isconsidered an alternate way towards enhancing crop growth in saline ecosystems. It is reportedthat PGPR is enabled to produce exopolysaccharides which lead to biofilm formation and generateosmoprotectants and antioxidant enzymes that can significantly contribute to stimulating plantgrowth in the saline ecosystem. In addition, several plant growth-promoting characteristics of PGPRsuch as the acquisition of essential nutrients and upsurge hormone production could enhance plantgrowth simultaneously. In this review, we will explore the survival mechanisms of ST-PGPR andtheir influence on plant growth promotion in saline ecosystems.

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