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Rhizobacteria of sugarcane: In vitro screening for their plant Growth Promoting potentials

Author Affiliations

  • 1Department of Microbiology, Shree Ramkrishna Institute of Computer Education and Applied Sciences, Surat-395001, INDIA
  • 2 Veer Narmad South Gujarat University- 395001, Surat, Gujarat, INDIA

Res. J. Recent Sci., Volume 3, Issue (IVC-2014), Pages 52-58, (2014)


Plant growth promoting Rhizobacteria (PGPR) are group of naturally occurring soil microorganisms that aggressively colonize plant root and enhance growth of plant and yield by direct and indirect mechanism. In search for efficient PGPR strains associated to Saccharum officinarum, a total of 50 isolates were obtained from the rhizospheric soil, root, stem and leaf of sugarcane plant that were grown in agricultural field of Kamrej, Surat district, India. Among 50, eleven isolates exhibited multiple Plant growth promoting traits viz., direct mechanisms: Solubilization of Phosphate, Biological Nitrogen fixation, Zinc solubilization, Potassium solubilization, Indole-3-acetic acid (IAA) production, 1-aminocyclopropane-1- carboxylate (ACC) deaminase production, 46 isolates exhibited positively for Tri-calcium phosphate solubilization on pikovskaya agar. 39 isolates were able to fix atmospheric nitrogen, 25 isolates were able to solubilizing zinc, 24 isolates were able to solubilizing Potassium, 40 isolates were able to cleave 1-aminocyclopropane-1-carboxylate, and all isolates produced IAA in the presence of L-Tryptophan. Such multiple positive PGP traits isolates can be further explored as effective bio-inoculants to improving plant growth and yield.


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