Plant-growth-promoting rhizobacteria (PGPR); Pseudomonas fluorescens (NAIMCC-B-00340) and Azotobacter chroococcum Beijerinck 1901 (accession No. MCC 2351) were obtained from the National Bureau of Agriculturally Important Microorganisms (NBAIM) Mau, and National Centre for Cell Science (NCCS), Pune, respectively. The selection of these strains was based on their growth-promoting properties. A nutrient broth was used for making an overnight culture of these strains.
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