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Article

Isolation, screening and application of a potent PGPR for enhancing growth of Chickpea as affected by nitrogen level

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Pages 333-350 | Published online: 20 Jun 2019
 

ABSTRACT

Chickpea (Cicer arietinum L.) can obtain much of its N requirement through nitrogen fixation, but plant productivity also relies on N fertilization. Nitrogen capture from fertilizers by the plant is highly inefficient and can have a negative impact on the environment. Plant growth promoting rhizobacteria (PGPR) can improve efficiency of N fertilizer use and support optimum plant growth under low N input to soil. Chickpea plants were grown in pots and treated with low and optimum N input supplemented with PGPR. Bacteria isolated from chickpea rhizosphere exhibited potential growth promoting production of ammonia, indole acetic acid and phytase and solubilization of inorganic phosphate and zinc. A PGPR strain, identified as Cedecea davisae RS3, was selected by principal component analysis and its effect on plant growth promotion evaluated in chickpea plants under N-appropriate (N+), N-deficit with RS3 (NRS3) and N-appropriate with RS3 (N+RS3) treatments. Overall performance of chickpea plants grown under NRS3 was better than that of N+ and N+RS3 plants. The improved performance under N-RS3 could be related to enhancement of root nodulation and nitrogenase activity. The PGPR with N-RS3 might be used to obtain sustainable production of chickpea under reduced N.

Acknowledgments

Deepika Mazumdar and Shilpi Ghosh acknowledge Department of Biotechnology, University of North Bengal, West Bengal, India for allowing the work to be conducted in the department.

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