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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 Comparative P solubilizing efficiencies of five acid soil bacteria incubated with calcium, aluminium and iron phosphates
 
Creator Pradhan, Madhusmita
Das, Rajeswari
Sahoo, Ranjan Kumar
Adak, Totan
Pradhan, Chinmay
Mohanty, Santanu
 
Subject Bacillus
Biofertilizer
Burkholderia
Gluconic acid
HPLC
 
Description 947-955
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.Bacillus cereus BLS18 (KT582541), Bacillus amyloliquefaciens CTC12 (KT633845), Burkholderia cepacia
KHD08 (KT717633), Burkholderia cepacia KJR03 (KT717634), Burkholderia cepacia 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> FePO4> AlPO4> Fe3(PO4)2. B. amyloliquefaciens
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. B.
amyloliquefaciens 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.
 
Date 2022-10-06T10:04:38Z
2022-10-06T10:04:38Z
2022-10
 
Type Article
 
Identifier 0975-0959 (Online); 0301-1208 (Print)
http://nopr.niscpr.res.in/handle/123456789/60646
https://doi.org/10.56042/ijbb.v59i10.67099
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJBB Vol.59(10) [Oct 2022]