NODULE FORMATION, DISTRIBUTION AND SYMBIOTIC EFFICACY OF VIGNA UNGUICULATA L. UNDER DIFFERENT SOIL SALINITY REGIMES

Authors

  • R. J. Predeepa Department of Biology, Faculty of Rural Oriented Sciences, Gandhigram Rural University, Gandhigram, Tamil Nadu, India; 2 School of Plant Biology, Faculty of Natural and Agricultural Sciences, The University of Western Australia, Western Australia, Australia
  • D. A. Ravindran Department of Biology, Faculty of Rural Oriented Sciences, Gandhigram Rural University, Gandhigram, Tamil Nadu, India

DOI:

https://doi.org/10.9755/ejfa.v22i4.4875

Keywords:

Cowpea, nodulation, rhizobium, root system, salt stress, symbiotic efficacy

Abstract

Rhizobium-legume symbiosis is one of the most well-established symbiotic nitrogen fixing system for agronomic studies. The current study aimed to test the hypothesis that screening for salt-tolerant rhizobial strains or salt-tolerant cultivar does not necessarily promise a salttolerant symbiotic system, as the symbiotic system is more sensitive to salt stress than the bacterium and/or the plant. In fact, the current study reveals that there is a decrease in salt tolerance of the symbiotic system by 1 dS/m , and also that there is a gradual shift in the spatial distribution of the nodules from the primary roots to the secondary roots under increased salt levels, and is time-dependant. Thus, the current study confirms that there is a need to screen for salt-tolerant symbiotic Rhizobium-legume system for producing efficient root nodules, thereby an efficient repository for nitrogen fixation

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Published

2017-10-25

How to Cite

Predeepa, R. J., and D. A. Ravindran. “NODULE FORMATION, DISTRIBUTION AND SYMBIOTIC EFFICACY OF VIGNA UNGUICULATA L. UNDER DIFFERENT SOIL SALINITY REGIMES”. Emirates Journal of Food and Agriculture, vol. 22, no. 4, Oct. 2017, pp. 275-84, doi:10.9755/ejfa.v22i4.4875.

Issue

Section

Regular Articles