Characterization of multifarious plant growth promoting traits of rhizobacterial strain AR6 under Chromium (VI) stress

What is it about?

Plant growth promoting rhizobacteria (PGPR) can increase the host plant tolerance to cope up with heavy metal induced stress, which can be improve plant growth. Thus, the present study was designed to isolate Cr (VI) tolerant PGPR strain and evaluate its plant growth promoting (PGP) properties under Cr (VI) stress. Rhizobacterial strain AR6 was isolated from the rhizosphere of Phaseolus vulgaris L. and showed 99% homology with Cellulosimicrobium funkei (KM032184) in BLASTn analysis. Strain AR6 was specifically selected due to its high Cr (VI) tolerance (1200 μg/ml) and substantial production of PGP substances. Strain AR6 produced 36.75 μg/ml of indole acetic acid (IAA), 60.40 μg/ml of ammonia and 14.23 μg/ml of exopolysaccharide (EPS). Moreover, strain AR6 showed positive results for catalase, protease, amylase, lipase production and phosphate …

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