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

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Title Rock inhabiting potassium solubilizing bacteria from Kerala, India: Characterization and possibility in chemical K fertilizer substitution
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Creator Indira Parameswaran Anjanadevi1, Neetha Soma John1, Kuzhivilayil Susan John1, Muthulekshmi Lajapathy Jeeva1 and Raj Shekhar Misra2
 
Subject KSB / Rock powder bioformulation / Bacillus / Elephant foot yam
 
Description Not Available
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
the yield of a high K demanding tuberous vegetable crop, elephant foot yam (Amorphophallus
paeoniifolius (dennst.) nicolson) established the possibility of substituting chemical K fertilizer
with these biofertilizer candidates successfully.
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Date 2021-08-04T06:25:37Z
2021-08-04T06:25:37Z
2015-09-01
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/52870
 
Language English
 
Relation Not Available;
 
Publisher WILEY-VCH Verlag GmbH & Co.KGaA,Weinheim