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Microbiology Journal
  Year: 2011 | Volume: 1 | Issue: 2 | Page No.: 54-64
DOI: 10.3923/mj.2011.54.64
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Assessment of Plant Growth Promoting Activities of Rhizobacterium Pseudomonas putida under Insecticide-Stress

Munees Ahemad and Mohammad Saghir Khan

The aim of this study was to evaluate the effect of the recommended field rates as well as two and three times the recommended field rates of insecticides (fipronil, pyriproxyfen, imidacloprid, thiamethoxam) on plant growth promoting traits of the rhizobacterium Pseudomonas putida strain PS9. The insecticide-tolerant and phosphate solubilizing Pseudomonas putida strain PS9 was isolated from the mustard (Brassica compestris) rhizosphere and identified following 16S rDNA sequencing. The Pseudomonas putida strain PS9 possessed considerable insecticide-tolerance and indole acetic acid, siderophores (salicylic acid and 2, 3 dihydroxy benzoic acid), exo-polysaccharides, HCN and ammonia producing traits. As the concentration of each insecticide was increased from the recommended dose rate to the higher one, a progressive decline in all plant growth promoting properties (excluding exo-polysaccharides) of the Pseudomonas putida strain PS9 was observed. Insecticides at the recommended dose had less inhibitory impact while the doses of insecticides higher than the recommended dose reduced the plant growth promoting traits significantly. The study concluded that insecticides should be screened based on their degree of toxicity to plant growth promoting properties of rhizobacteria before their field application.
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How to cite this article:

Munees Ahemad and Mohammad Saghir Khan, 2011. Assessment of Plant Growth Promoting Activities of Rhizobacterium Pseudomonas putida under Insecticide-Stress. Microbiology Journal, 1: 54-64.

DOI: 10.3923/mj.2011.54.64






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