| Mechanism of insoluble phosphate solubilization by Pseudomonas fluorescens RAF15 isolated from ginseng rhizosphere and its plant growth-promoting activities. | |
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MedLine Citation:
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PMID: 19486289 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIMS: To investigate the mechanism of insoluble phosphate (P) solubilization and plant growth-promoting activity by Pseudomonas fluorescens RAF15. METHODS AND RESULTS: We investigated the ability of Ps. fluorescens RAF15 to solubilize insoluble P via two possible mechanisms: proton excretion by ammonium assimilation and organic acid production. There were no clear differences in pH and P solubilization between glucose-ammonium and glucose-nitrate media. P solubilization was significantly promoted with glucose compared to fructose. Regardless of nitrogen sources used, Ps. fluorescens RAF15 solubilized little insoluble P with fructose. High performance liquid chromatography analysis showed that Ps. fluorescens RAF15 produced mainly gluconic and tartaric acids with small amounts of 2-ketogluconic, formic and acetic acids. During the culture, the pH was reduced with increase in gluconic acid concentration and was inversely correlated with soluble P concentration. Ps. fluorescens RAF1 showed the properties related to plant growth promotion: pectinase, protease, lipase, siderophore, hydrogen cyanide, and indoleacetic acid. CONCLUSION: This study indicated that the P solubility was directly correlated with the organic acids produced. SIGNIFICANCE AND IMPACT OF THE STUDY: Pseudomonas fluorescens RAF15 possessed different traits related to plant growth promotion. Therefore, Ps. fluorescens RAF15 could be a potential candidate for the development of biofertilizer or biocontrol agent. |
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Authors:
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K-H Park; C-Y Lee; H-J Son |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2009-05-22 |
Journal Detail:
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Title: Letters in applied microbiology Volume: 49 ISSN: 1472-765X ISO Abbreviation: Lett. Appl. Microbiol. Publication Date: 2009 Aug |
Date Detail:
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Created Date: 2009-07-27 Completed Date: 2009-09-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8510094 Medline TA: Lett Appl Microbiol Country: England |
Other Details:
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Languages: eng Pagination: 222-8 Citation Subset: IM |
Affiliation:
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Department of Life Science and Environmental Biochemistry, Pusan National University, Miryang, Korea. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acetic Acid
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metabolism Culture Media / chemistry Formic Acids / metabolism Fructose / metabolism Gluconates / metabolism Glucose / metabolism Hydrogen-Ion Concentration Nitrates / metabolism Panax / growth & development, microbiology* Phosphates / metabolism* Plant Growth Regulators / metabolism Plant Roots / growth & development, microbiology* Pseudomonas fluorescens / isolation & purification, metabolism* Quaternary Ammonium Compounds / metabolism Soil Microbiology* Tartrates / metabolism |
| Chemical | |
Reg. No./Substance:
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0/Culture Media; 0/Formic Acids; 0/Gluconates; 0/Nitrates; 0/Phosphates; 0/Plant Growth Regulators; 0/Quaternary Ammonium Compounds; 0/Tartrates; 20248-27-5/2-ketogluconate; 30237-26-4/Fructose; 50-99-7/Glucose; 526-83-0/tartaric acid; 526-95-4/gluconic acid; 64-18-6/formic acid; 64-19-7/Acetic Acid |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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