Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 22, Issue 2, 2020; Page No.(334-337)

DEVELOPMENT OF PLANT GROWTH PROMOTING MICROBIAL CONSORTIA WITH EFFICIENT ISOLATES

Y. KAVYA, N.TRIMURTULU, A.VIJAYA GOPAL, P. MADHU VANI AND N.V.V.S.D. PRASAD

Abstract

Plant Growth Promoting Rhizobacteria were isolated from sorghum growing vertislos of different districts of Andhra Pradesh during Kharif 2016-17. The PGP bacteria like Azotobacter, Azospirillium, PSB, KRB, ZnSB and PGP Isolate with antagonistic activity were isolated. The isolated PGPRs were screened for their morphological, physiological, biochemical and PGPR characteristics. The isolates with good plant growth promoting traits like N2 fixation, P-solubilization, K-releasing, Zn-solubilization and antagonistic activity were screened from a total of 60 isolates. The efficient isolates were tested for the compatibility on nutrient agar and tryptic soy agar. The efficient and compatible isolates viz., Azotobacter (KAA-1), Azospirillium (KAA-2), P-solubilizer (KAA-3), K-releaser (KNB-4), Zn-solubilizer (KPM-5) and PGP isolate (CPP-6) were utilized and three types of microbial consortia were developed.

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