Potential of Indigenous Rhizobacteria and the Consortium for Promoting the Growth of Sorghum bicolor (L.)

Abstract

Background: The present scenario of agriculture is dependent on chemical fertilizer, pesticides and artificial growth promoters etc. The extensive uses of these chemicals fertilizers affect soil and it become less fertile. These problem requireaying an attention towards the use of native biological agents for endorsement of plant growth. Indigenous rhizobacteria are the native rhizospheric bacteria having ability to enhance the growth and yield of crop along with bulk soil bacteria. Methods: In present study the selected area was North Maharashtra region in which mainly the sorghum is cultivated. Total 320 rhizobacteria were screen for PGP traits viz. IAA, GA, ACC deaminase production, phosphate, zinc, potassium solubilization. The potential PGPR used for seed germination and pot assay. Result: The highest IAA production was 79.74 µg/mL and GA producing isolate shows 227.27 µg/mL. The quantitative analysis of Phosphate reports 455 µgm/mL. Most of the isolates showed positivity for all the traits. From among all isolates, 12 were selected for preparation of consortium. Seed germination plate assay and pot assay. Seed germination assay shows highest vigor index (820) by mixture of both biostimulators. Similar results were obtained during pot assay, vigor index was 3320 for the combine treatment of both biostimulators.