Isolation of a starch utilizing, phosphate solubilizing fungus on buffered medium and its characterization

Ahuja, Amita; Ghosh, Somnath; D’Souza, S.F.

doi:10.1016/j.biortech.2006.10.041

Cited by 53 publications

(37 citation statements)

References 13 publications

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“…Moreover, PSM11-5 could reduce the pH value in the medium when supplemented with buffers. These results are similar to previous reports [30,32], and indicate that PSM11-5 could be used as a potential effective solubilizer of phosphate in alkaline soils.…”

Section: Discussionsupporting

confidence: 95%

Isolation and phosphate‐solubilizing ability of a fungus, Penicillium sp. from soil of an alum mine

Chai

Liu

et al. 2011

J. Basic Microbiol.

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The use of microorganisms to solubilize elemental phosphorus from insoluble rock phosphate is a promising method to greatly reduce not only environmental pollution but also production costs. Phosphate-solubilizing microorganisms were isolated from soils in China, and a fungus strain (PSM11-5) from a soil sample from an alum mine, with the highest phosphate solubilization potential, was selected and identified as a Penicillium sp. Strain PSM11-5 could grow in buffered medium with pH values between 3.0 and 8.0 and showed phosphate solubilizing activity at pH values from 5.0 to 8.0. It also exhibited a degree of tolerance to the heavy metal ions, Cd(2+), Co(2+), and Cr(6+). PSM11-5 could rapidly solubilize tricalcium phosphate, and a high phosphate-solubilizing efficiency of 98% was achieved in an optimized medium. The strain could solubilize rock phosphate and aluminum phosphate with a solubilizing efficiency of approximately 74.5%, but did not solubilize iron phosphate. Solubilization of phosphate depended on acidification. Analysis of PSM11-5 culture supernatants by capillary electrophoresis showed that tricalcium phosphate was solubilized to PO(4) (3-) and Ca(2+) , and that the organic acid produced by the fungus was mainly gluconic acid at approximately ca. 13 g l(-1). In addition, PSM11-5 produced ca. 830 mg l(-1) of citric acid when it was used to solubilize rock phosphate. These excellent properties of strain PSM11-5 suggest that the fungus has potential for agricultural and industrial utilization.

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Section: Discussionsupporting

confidence: 95%

Isolation and phosphate‐solubilizing ability of a fungus, Penicillium sp. from soil of an alum mine

Chai

Liu

et al. 2011

J. Basic Microbiol.

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“…However, there are some earlier reports contrary to these findings showing differences in phosphate solubilization as well as different mechanisms involved in acidity generation when ammonium and nitrate were used (Halder et al, 1991;Kpomblekou and Tabatabai, 1994). They reported that the rate of phosphate solubilization accelerates due to inorganic acids production by a proton exchange mechanism in the presence of ammonium ion (Ahuja et al, 2007). However, production of organic acids was greatly affected by the carbon source, not the nitrogen source.…”

Section: Effect Of Carbon and Nitrogen Sourcescontrasting

confidence: 49%

Synergistic effect of co-inoculation with phosphate-solubilizing bacteria

Park¹,

Lee²,

Han³

et al. 2016

Korean Journal of Agricultural Science

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The synergistic effect on phosphate solubilization of single-and co-inoculation of two phosphate solubilizing bacteria, Burkholderia anthina PSB-15 and Enterobacter aerogenes PSB-16, was assessed in liquid medium and green gram plants. Co-inoculation of two strains was found to release the highest content of soluble phosphorus (519 µg mL -1 ) into the medium, followed by single inoculation of Burkholderia strain (492 µg mL -1 ) and Enterobacter strain (483 µg mL -1 ).However, there was no significant difference between single inoculation of bacterial strain and co-inoculation of two bacterial strains in terms of phosphorous release. The highest pH reduction, organic acid production, and glucose consumption were observed in the culture medium co-inoculated with PSB-15 and PSB-16 strains rather than that of single inoculation. Based on the plant growth promotion bioassay, co-inoculated mung bean seedlings recorded 9% and 8% higher shoot and root growth, respectively, compared to the control. Therefore, in conclusion, co-inoculation of the strains B. anthina and E. aerogenes displayed better performance in stimulating plant growth than inoculation of each strain alone. However, considering the short assessment period of the present study, we recommend engaging in further work under field conditions in order to test the suitability of these strains as bio-inoculants.

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“…However, the lowest P solubilization was recorded with sodium nitrite (NaNO 2 ) in both strains. Production of inorganic acids by proton exchange mechanism in the presence of ammonium ion has been reported to accelerate 'P' solubilization (Halder et al 1991;Nautiyal et al 2000;Ahuja et al 2007). It has been observed that there is no correlation between 'P' solubilization and organic acid excretion, the 'P' solubilization was due to the release of protons accompanying respiration or NH 4 + assimilation (Taha et al 1969;Illmer and Schinner 1995).…”

Section: Resultsmentioning

confidence: 98%

Efficient phosphorus solubilization by mutant strain of Xanthomonas campestris using different carbon, nitrogen and phosphorus sources

Sharan

Shikha

Darmwal

2008

World J Microbiol Biotechnol

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The phosphate solubilization activity of Xanthomonas campestris was measured in both the wild type and mutant strains using various carbon and nitrogen sources. Glucose was found to be the best in both (wild 39.9%; mutant 67.1%) strains followed by sucrose (46.8%) in the mutant and molasses (36.0%) in the wild type. Ammonium sulphate was the best nitrogen source for both the strains, followed by ammonium nitrate and urea. Dicalcium phosphate (DCP) was solubilized maximally by both the strains followed by tricalcium phosphate (TCP) and rock phosphate (RP) when various concentrations of different phosphate sources were tested.

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Isolation of a starch utilizing, phosphate solubilizing fungus on buffered medium and its characterization

Cited by 53 publications

References 13 publications

Isolation and phosphate‐solubilizing ability of a fungus, Penicillium sp. from soil of an alum mine

Isolation and phosphate‐solubilizing ability of a fungus, Penicillium sp. from soil of an alum mine

Synergistic effect of co-inoculation with phosphate-solubilizing bacteria

Efficient phosphorus solubilization by mutant strain of Xanthomonas campestris using different carbon, nitrogen and phosphorus sources

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