Stress induced phosphate solubilization in bacteria isolated from alkaline soils

Phosphate solubilizing bacteria NBRI0603, NBRI2601, NBRI3246 and NBRI4003 were isolated from the rhizosphere of chickpea and alkaline soils. All four strains demonstrated diverse levels of phosphate solubilization activity under in vitro conditions in the presence of various carbon and nitrogen sour...

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Bibliographic Details
Published in:FEMS microbiology letters 2000-01, Vol.182 (2), p.291-296
Main Authors: Nautiyal, C.Shekhar, Bhadauria, Shipra, Kumar, Pradeep, Lal, Hind, Mondal, Rajesh, Verma, Dinesh
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Alkaline soil
alkaline soils
bacteria
Bacteria - growth & development
Bacteria - isolation & purification
Bacteria - metabolism
Biochemistry
Biochemistry and biology
Biological and medical sciences
calcium
Calcium - metabolism
carbon
Carbon - metabolism
Chemical, physicochemical, biochemical and biological properties
chickpeas
Culture Media
Edetic Acid - pharmacology
EDTA (chelating agent)
Fundamental and applied biological sciences. Psychology
Hydrogen-Ion Concentration
nitrogen
Nitrogen - metabolism
Phosphate mineralization
Phosphate solubilizing bacteria
phosphates
Phosphates - metabolism
Physics, chemistry, biochemistry and biology of agricultural and forest soils
Plant Roots - microbiology
rhizosphere
Sodium Chloride - metabolism
Soil Microbiology
Soil science
Solubility
solubilization
Stress
Temperature
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Summary:Phosphate solubilizing bacteria NBRI0603, NBRI2601, NBRI3246 and NBRI4003 were isolated from the rhizosphere of chickpea and alkaline soils. All four strains demonstrated diverse levels of phosphate solubilization activity under in vitro conditions in the presence of various carbon and nitrogen sources. Acid production may have contributed to phosphate solubilization, but was not the only reason for phosphate release into the medium. Among the four strains, NBRI2601 was the most efficient strain in terms of its capability to solubilize phosphorus in the presence of 10% salt, pH 12, or 45°C. The strains showed varied levels of phosphate solubilization when the effects of different sources of nitrogen were examined during growth. The presence of low levels of Ca 2+ and EDTA in the medium enhanced phosphate solubilization.
ISSN:0378-1097
1574-6968
DOI:10.1016/S0378-1097(99)00605-9