Volume :

5

Issue :

1

Abstract :

Plant Growth Promoting Rhizobacteria (PGPR) plays an important role in agricultural systems, especially as biofertilizer. Inoculation of plant material with PGPR can protect plants against salt stress through an increase in plant growth parameters and the regulation of ion concentration and antioxidant enzymes. Salinity produces oxidative stress by altering the general metabolic processes and enzymatic activities and enhanced occurrence of damaging toxic molecule i.e. reactive oxygen species (ROS). Plants can run away the damaging effects of reactive oxygen species by developing a physiologically powerful defence system together with antioxidant enzymes like CAT, POD and SOD. Catalase, which is involved in the degradation of H2O2 into water and oxygen, is the major H2O2 scavenging enzyme in all-aerobic organisms. Catalase is critical for maintaining the redox balance during oxidative stress and functions as a cellular sink for H2O2. Microbial inoculation to alleviate salinity stress could provide an innovative and cost-effective alternative to overcome salinity stress in soils. The objective of the present study was to evaluate the H2O2 scavenging effects of beneficial bacterial strains of Bacillus species under saline stress in three different varieties of Indian mustard.