Effect of Pesticides on Plant Growth Promoting Traits of Greengram-Symbiont, Bradyrhizobium sp. strain MRM6

  • Munees Ahemad
  • Mohammad Saghir KhanEmail author


The aim of this study was to investigate the toxicity of herbicides (metribuzin and glyphosate), insecticides (imidacloprid and thiamethoxam) and fungicides (hexaconazole, metalaxyl and kitazin) at the recommended and the higher dose rates on plant growth promoting activities of Bradyrhizobium sp. under in vitro conditions. The Bradyrhizobium sp. strain MRM6 was isolated from nodules of greengram plants. Pesticide-concentration dependent progressive-decline was observed in plant growth promoting traits of the strain MRM6 apart from exo-polysaccharides which increased consistently on increasing pesticide concentrations. Generally, the highest toxicity to plant growth promoting characteristics of the Bradyrhizobium sp. strain MRM6 was observed when the strain MRM6 was grown with three times the recommended field rates of glyphosate, imidacloprid and hexaconazole.


Bradyrhizobium Pesticide Plant growth promoting rhizobacteria Toxicity Tolerance Greengram 



The authors thank to Dr. Nakhat Ara Naqvi, Parijat Agrochemicals, New Delhi, India, for providing technical grade pesticides and University Grants Commission (UGC), New Delhi for financial support.


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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Department of Agricultural Microbiology, Faculty of Agricultural SciencesAligarh Muslim UniversityAligarhIndia

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