Rock inhabiting potassium solubilizing bacteria from Kerala, India: characterization and possibility in chemical K fertilizer substitution

Journal of Basic Microbiology
Indira Parameswaran AnjanadeviRaj Shekhar Misra

Abstract

The role of rock inhabiting bacteria in potassium (K) solubilization from feldspar and their application in crop nutrition through substitution of fertilizer K was explored through the isolation of 36 different bacteria from rocks of a major hill station at Ponmudi in Thiruvananthapuram, Kerala, India. A comprehensive characterization of K solubilization from feldspar was achieved with these isolates which indicated that the K solubilizing efficiency increases with decrease in pH and increase in viscosity and viable cell count. Based on the level of K solubilization, two potent isolates were selected and identified as Bacillus subtilis ANctcri3 and Bacillus megaterium ANctcri7. Exopolysaccharide production, scanning electron microscopic and fourier transform infrared spectroscopic studies with these efficient strains conclusively depicted the role of low pH, increase in viscosity, and bacterial attachment in K solubilization. They were also found to be efficient in phosphorus (P) solubilization, indole acetic acid production as well as tolerant to wide range of physiological conditions. Moreover, the applicability of K containing rock powder as a carrier for K solubilizing bacteria was demonstrated. A field level evaluation on ...Continue Reading

References

Jul 2, 1998·Applied and Environmental Microbiology·T GehrkeW Sand
Mar 3, 2009·Applied and Environmental Microbiology·Sébastien VilainVolker S Brözel
Dec 7, 2010·Colloids and Surfaces. B, Biointerfaces·Yuanyuan CaoWei Liang

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Citations

Jan 4, 2020·Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology]·Mahendra Vikram Singh RajawatAnil Kumar Saxena
Dec 29, 2020·Frontiers in Plant Science·Igor Daniel Alves RibeiroLuciane Maria Pereira Passaglia

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