PMID: 19915739Nov 17, 2009Paper

Isolation, molecular characterization and growth-promotion activities of a cold tolerant bacterium Pseudomonas sp. NARs9 (MTCC9002) from the Indian Himalayas

Biological Research
Pankaj K MishraHari S Gupta

Abstract

A bacterium that grows and expresses plant growth promotion traits at 4 degrees C was isolated from the rhizospheric soil of Amaranth, cultivated at a high altitude location in the North Western Indian Himalayas. The isolate was Gram negative and the cells appeared as rods (2.91 x 0.71 microm in size). It grew at temperatures ranging from 4 to 30 degrees C, with a growth optimum at 28 degrees C. It exhibited tolerance to a wide pH range (5-10; optimum 8.0) and salt concentrations up to 6% (wt/vol). Although it was sensitive to Rifampicin (R 20 microg mi-1), Gentamicin (G 3 microg mi-1), and Streptomycin (S 5 microg mi-1), it showed resistance to higher concentrations of Ampicillin (A 500 microg mi-1), Penicillin (P 300 microg mi-1), Polymixin B sulphate (Pb 100 microg mi-1) and Chloramphenicol (C 200 microg mi-1). The 16S rRNA sequence analysis revealed maximum identity with Pseudomonas lurida. The bacterium produced indole Acetic Acid (IAA) and solubilizes phosphate at 4, 15 and 28 degrees C. It also retained its ability to produce rhamnolipids and siderophores at 15 degrees C. Seed bacterization with the isolate enhanced the germination, shoot and root lengths of thirty-day-old wheat seedlings by 19.2, 30.0 & 22.9% respective...Continue Reading

Citations

Jul 19, 2013·Archives of Microbiology·Shekhar Chandra BishtGopal Kishna Joshi
Jul 15, 2015·Journal of Toxicology and Environmental Health. Part a·Ying MaHelena Freitas
Feb 27, 2016·PloS One·Farid BeikiElena García-Valdés
Dec 24, 2013·SpringerPlus·Shekhar Chandra BishtPankaj Kumar Mishra
Jan 19, 2016·Applied Microbiology and Biotechnology·Kusum Dhakar, Anita Pandey
Aug 5, 2017·Environmental Science and Pollution Research International·Peng ZhangChaolan Zhang

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