Cold-Adapted and Rhizosphere-Competent Strain of Rahnella sp. with Broad-Spectrum Plant Growth-Promotion Potential
IR@IHBT: CSIR-Institute of Himalayan Bioresource Technology, Palampur
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Title |
Cold-Adapted and Rhizosphere-Competent Strain of Rahnella sp. with
Broad-Spectrum Plant Growth-Promotion Potential
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Creator |
Vyas, P
Joshi, R Sharma, K C Rahi, P Gulati, Arvind Gulati, Ashu |
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Subject |
Plant Biotechnology
Microbiology |
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Description |
A phosphate-solubilizing bacterial strain isolated from
Hippophae rhamnoides rhizosphere was identified as
Rahnella sp. based on its phenotypic features and 16S rRNA
gene sequence. The bacterial strain showed the growth
characteristics of a cold-adapted psychrotroph, with the
multiple plant growth-promoting traits of inorganic and
organic phosphate solubilization, 1-aminocyclopropane-1-
carboxylate-deaminase activity, ammonia generation, and
siderophore production. The strain also produced indole-
3-acetic acid, indole-3-acetaldehyde, indole-3-acetamide,
indole-3-acetonitrile, indole-3-lactic acid, and indole-3-
pyruvic acid in tryptophan-supplemented nutrient broth.
Gluconic, citric and isocitric acids were the major organic
acids detected during tricalcium phosphate solubilization.
A rifampicin-resistant mutant of the strain exhibited high
rhizosphere competence without disturbance to the resident
microbial populations in pea rhizosphere. Seed bacterization
with a charcoal-based inoculum significantly increased
growth in barley, chickpea, pea, and maize under the
controlled environment. Microplot testing of the inoculum
at two different locations in pea also showed significant
increase in growth and yield. The attributes of coldtolerance,
high rhizosphere competence, and broad-spectrum
plant growth-promoting activity exhibited the potential of
Rahnella sp. BIHB 783 for increasing agriculture productivity.
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Date |
2010
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Type |
Article
PeerReviewed |
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Format |
application/pdf
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Identifier |
http://ihbt.csircentral.net/890/1/COLD%2DADAPTED_PLANT_GROWTH%2DPROMOTING_RAHNELLA_SP.pdf
Vyas, P and Joshi, R and Sharma, K C and Rahi, P and Gulati, Arvind and Gulati, Ashu (2010) Cold-Adapted and Rhizosphere-Competent Strain of Rahnella sp. with Broad-Spectrum Plant Growth-Promotion Potential. Journanl of Microbiology and Biotechnology, 20 (12). pp. 1724-1734. |
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Relation |
http://ihbt.csircentral.net/890/
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