Characterization of a cold-tolerant plant growth-promoting bacterium Pantoea dispersa 1A isolated from a sub-alpine soil in the North Western Indian Himalayas

  • G. Selvakumar
  • S. Kundu
  • Piyush Joshi
  • Sehar Nazim
  • A. D. Gupta
  • P. K. Mishra
  • H. S. Gupta
Original paper

Abstract

Pantoea dispersa strain 1A is a Gram-negative rod-shaped, yellow-pigmented bacterium isolated on nutrient agar plates incubated at 4°C. The identity of the bacterium was confirmed by sequencing of the 16 S rRNA gene. It was capable of growing at temperatures ranging from 4 to 42°C, but maximum growth was observed at 30°C. It is endowed with multiple plant growth promotion attributes such as phosphate solubilization, IAA production, siderophore production and HCN production, which are expressed differentially at sub-optimal temperatures (15 and 4°C). It was able to solubilize phosphate (17.6 μg of P2O5 ml−1 day−1), and produce IAA (3.7 μg ml−1 day−1), at 15°C. Qualitative detection of siderophore production and HCN were also observed at 15°C. At 4°C it was found to express all the plant growth promotion attributes. This bacterial isolate was able to positively influence and promote the growth and nutrient uptake parameters of wheat (cv. VL.802) under glasshouse conditions. Hence in the context, of cold wheat-growing environments, it is proposed that Pantoea dispersa 1A (MTCC 8706), could be deployed as an inoculant to attain the desired results of bacterization.

Keywords

Cold tolerance Nutrient uptake Pantoea dispersa Plant growth promotion 

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Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • G. Selvakumar
    • 1
  • S. Kundu
    • 1
  • Piyush Joshi
    • 1
  • Sehar Nazim
    • 1
  • A. D. Gupta
    • 1
  • P. K. Mishra
    • 1
  • H. S. Gupta
    • 1
  1. 1.Vivekananda Institute of Hill AgricultureIndian Council of Agricultural ResearchAlmoraIndia

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