Evaluation of Potential PGPRs with Biocontrol Activity against Dry Root of Chickpea caused by Rhizoctonia bataticola and Mitigating Physiological Stress

Author: Bethala Kumeera, Swapnil B. Matikhaye, P.W. Ramteke and Suchit A. John*

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Abstract

In this present study, out of thirty one root colonizing chickpea (C. arietinum) rhizosphere bacterial isolates, three isolates reported highly antagonistic to R. bataticola and found to be potential on the basis of 16S rRNA under accession number KP966499 for the strain PR31 identified as Bacillus subtilis. PR30 strain identified as Bacillus subtilus under accession number KP966505. PR10 strain identified as Enterobacter cloacae under accession number KP226575 and was deposited in Gen-Bank sequence database. The synergistic effects of PGPR as single and consortium treatments T9 (B+C) with E. cloacae and B. subtilis in this study ameliorated drought effects by reducing the degradation of chlorophyll ‘a’ ranged 0.67 mg/g, chlorophyll ‘b’ ranged 0.43 mg/g and total chlorophyll content 1.12 mg/g by improving water balance and osmoregulation by acting as osmoprotectant. Likewise by increased carotenoid in T6 with 80.31 µg/g content according to the mean data, assisted in declining

Keywords

PGPR, R. bataticola, drought, chickpea, biochemical.