PJB-2018-602
IMPACT OF SALINITY STRESS ON CULTIVATED CROPS –II: ROLE OF RHIZOBIAL MICROBIOTA IN MODULATING CROPS RESPONSES TO SALINITY STRESS
Dr. Zahir Muhammad
Abstract
Soil salinity provoked by agricultural intensification, the prevalence of drought, flooding, climate changes and several other factors remain one of the leading non-biological stresses which severely affect the growth of economically important crops and ultimately reduces their production outputs. The problem of salinity shows its adversities in those areas where evaporation rate exceed the precipitation rate. Some other factors corresponding to salinity emergence in agricultural lands include natural weathering, non-systemic irrigation practices and intensification of agriculture. Currently, there is no cure to manage salinity and its adverse effects on crops to full extent, however, the adverse effects may be minimized by employing sustainable approaches. Soil microorganisms –those with growth-stimulating potentials of crops –offer an eco-friendly and environmentally sound opportunity to agronomists as a salinity mitigating agents. Several strains of plant growth promoting rhizobacteria (PGPR) have the abilities to recover soil quality degraded by salinity and directly or indirectly improve crops’ growth in a saline environment. The purpose of this review is to highlight PGPR as salinity mediators.
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