Assessment of the Osmotolerant Endophytic Bacteria from Mustard and Nagphani for their Plant Growth Promoting activities under Osmotic stress

Amelioration of short‐term drought stress during different growth stages in Brassica juncea by rhizobacteria mediated maintenance of ROS homeostasis

“…Earlier studies have also indicated the deleterious effect of drought on root and shoot biomass (Manjunatha et al, 2017; Tahir et al, 2019). However, under drought the inoculated plants showed significant improvement in root and shoot dry weight as compared to uninoculated plants, probably due to the ability of these rhizobacteria to produce phytohormones (IAA and GA) and ACC deaminase enzyme activity during plant‐rhizobacteria association under drought stress (Bandeppa et al, 2018; Rathi, Paul, Choudhary, et al, 2018). Several rhizobacteria are known to synthesize phytohormones namely IAA and GA which aid in root and shoot growth (Egamberdieva et al, 2017).…”

“…The Bacillus group of microorganisms constitute a recognizable portion of PGPRs thriving in cultivated soil. Several Bacillus strains with plant growth‐promoting traits (phosphate solubilization, exopolysaccharide, indole acetic acid, and gibberllic acid production, and ACC deaminase activity) have been evaluated in imparting drought stress tolerance in several crops (Rathi, Paul, Choudhary, et al, 2018; Rathi, Paul, Manjunatha, et al, 2018; Saikia et al, 2018). Inoculation with Bacillus strains increases seed germination, plant biomass, leaf RWC, membrane stability index, root adhering soil/root tissue ratio, aggregate stability under drought stress condition (Paul et al, 2017; Timmusk et al, 2014).…”

Rhizobacteria Bacillus spp. mitigate osmotic stress and improve seed germination in mustard by regulating osmolyte and plant hormone signaling

“…Similar results were reported in our previous study (Nivetha et al, 2021), where inoculation with rhizobacterial population densities, ranging from 10 5 to 10 7 cfu/ mL, stimulated seedling fresh weight in vitro, and shoot and root fresh weight at 30 days after sowing (DAS) in a pot experiment, under both no stress and water deficit stress conditions. Inoculation with rhizobacteria generally enhances seed germination, fresh weight and vigour of seedlings under osmotic stress; this has been reported in many crops such as mustard, pearl millet and cluster bean (Bandeppa et al, 2015;Manjunatha et al, 2017;Rathi et al, 2018).…”

“…Moreover, rhizobacterial strains used in this study B. casamancensis strain MKS-6 and Bacillus sp. strain MRD-17, were observed to produce gibberellins during plant-rhizobacterial interaction and might have contributed to the increased endogenous GA pool (Bandeppa et al, 2018;Rathi et al, 2018). ABA is reported to have an inhibitory effect on seed germination and seedling growth.…”

Plant growth‐promoting rhizobacteria Shewanella putrefaciens and Cronobacter dublinensis enhance drought tolerance of pearl millet by modulating hormones and stress‐responsive genes

“…Endophytic bacteria are well known to promote plant growth and alleviate drought stress (Hardoim et al, 2008; Manjunatha et al, 2019; Rathi et al, 2018). In the present investigation, we have tried to understand the underlying mechanism(s) involved in endophytic bacteria‐mediated mitigation of drought stress in pearl millet.…”