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Comparative P solubilizing efficiencies of five acid soil bacteria incubated with calcium, aluminium and iron phosphates

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Title Statement Comparative P solubilizing efficiencies of five acid soil bacteria incubated with calcium, aluminium and iron phosphates
 
Added Entry - Uncontrolled Name Pradhan, Madhusmita
Das, Rajeswri
Sahoo, Ranjan
Adak, Totan
Pradhan, Chinmay
Mohanty, Santanu
 
Uncontrolled Index Term Bacillus; Biofertilizer; Burkholderia; Gluconic acid; HPLC
 
Summary, etc. As acid soils of Odisha have been facing a major constraint in phosphorus availability, application of native P solubilizing bacteria could be promising as well as ecofriendly step towards sustainable P availability for crop growth and development. To address the problem of P availability in acid soil of Bhubaneswar, Odisha, rhizosphere soil samples (pH ≤ 5.50) with rice – pulses (green gram/black gram) cropping system were collected and phosphate solubilising bacteria were isolated. In vitro characterization of the PSB isolates were conducted with calcium, aluminium and iron phosphates to recover soluble P. All the five strains i.e. <em>Bacillus cereus</em> BLS18 (KT582541), <em>Bacillus amyloliquefaciens</em> CTC12 (KT633845), <em>Burkholderia cepacia</em> KHD08 (KT717633), <em>Burkholderia cepacia</em> KJR03 (KT717634), <em>Burkholderia cepacia </em>K1 (KM030037) could solubilize Ca3(PO4)2, AlPO4, FePO4, and Fe3(PO4)2. Higher recovery of soluble P was with Ca3(PO4)2 while the least was with AlPO4. All the strains exibited a trend similar with respect to P recovery i.e. Ca3(PO4)2 &gt; FePO4 &gt; AlPO4 &gt; Fe3(PO4)2. <em>B. amyloliquefaciens</em> CTC12 was most efficient in solubilizing calcium and iron phosphates whereas B. cepacia KHD08 recovered maximum P with aluminium phosphate. All the inorganic salt fortified mediums showed a significant decline in pH which necessitated the identification of compounds present in the mediums. Organic acids viz; acetic, citric, gluconic, lactic, malic, succinic, tartaric acids in the mediums were identified by HPLC. Tartaric acid was only found in the mediums supplemented with AlPO4.<em> B. amyloliquefaciens</em> CTC12 and B. cepacia KHD08 showed promising results in in vitro analysis of P solubilization. The present study is focused on problematic acid soils where phosphorous is unavailable and mostly fixed with aluminium and iron ultimately making it unavailable for the crops to take up. This leads to unbalanced and frequent use of chemical fertilizer. Hence the study is a significant attempt to characterize native PSBs with capacity to solubilize Al-P and Fe-P
 
Publication, Distribution, Etc. Indian Journal of Biochemistry and Biophysics (IJBB)
2022-10-04 16:34:31
 
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http://op.niscair.res.in/index.php/IJBB/article/view/67099
 
Data Source Entry Indian Journal of Biochemistry and Biophysics (IJBB); IJBB Vol. 59 (10) [October 2022]
 
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