PERFORMANCE OF REDGRAM RHIZOBIAL ISOLATES UNDER WATER STRESS CONDITION

S. ABINA¹, K. KUMUTHA²*, M. SENTHILKUMAR³, J. RAMALINGAM⁴, R. AMUTHA⁵, M. GNANACHITRA^6
1Department of Agricultural Microbiology, Agricultural College and Research Institute, Madurai, 625 104, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
²Department of Agricultural Microbiology, Agricultural College and Research Institute, Madurai, 625 104, Tamil Nadu Agricultural University, Coimbatore, 641 003, India
³Agricultural College and Research Institute, Eachangkottai, Thanjavur, 641 902, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
⁴Department of Biotechnology, Agricultural College and Research Institute, Madurai, 625 104, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
⁵Department of Seed Science and Technology, Agricultural College and Research Institute, Madurai, 625 104, Tamil Nadu Agricultural University, Coimbatore, 641 003,India
⁶Department of Agricultural Microbiology, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
* Corresponding Author : kkumuthatnau@gmail.com

Received : 30-06-2019     Accepted : 26-07-2019     Published : 30-07-2019
Volume : 11     Issue : 7       Pages : 1651 - 1654
Int J Microbiol Res 11.7 (2019):1651-1654

Keywords : Rhizobium, Drought, Polyethylene glycol, Plant growth promoting traits
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Agricultural College and Research Institute, Madurai, 625 104, Tamil Nadu Agricultural University, Coimbatore, 641 003, Tamil Nadu, India
Author Contribution : All authors equally contributed

A favorable ambiance is necessary for Plant-Microbe interaction. For an effective symbiosis, pulses are grown under arid and semi-arid conditions require drought-tolerant rhizobial strains. The efficiency of Rhizobium strains was analyzed under water stress conditions by addition of appropriate concentrations of polyethylene glycol 6000 (-0.1 to -1.0MPa water potential). In the present study 3 rhizobial cultures viz., CC1, RR3, and RR6 were taken, and the cultures showed good growth and survival under induced water stress with -0.5MPa and they were evaluated for the plant growth promoting traits. PGP traits viz., IAA, EPS production, biofilm formation, phosphate solubilization, siderophore production, survivability and seedling vigour under induced water stress was estimated under rhizobial inoculation supplemented with and without PEG and the results are presented in this paper.

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