Evaluation of plant-growth-promoting activities of rhizobacterium Pseudomonas putida under herbicide stress

By M. Ahemad, M. S. Khan. Annals of Microbiology, 2012

133 citations recorded by the source corpus.

The aim of this study was to evaluate the effect of selected herbicides (quizalafop-p-ethyl, clodinafop, metribuzin and glyphosate) at one, two and three times the recommended field rates on the plant-growth-promoting (PGP) traits of Pseudomonas putida strain PS9 isolated from the mustard rhizosphere. P. putida strain PS9 was selected for its high herbicide-tolerance and its production of substantial amounts of indole acetic acid, siderophores (salicylic acid and 2,3 dihydroxy benzoic acid) and exo-polysaccharides. It also exhibits HCN and ammonia releasing ability. A progressive, herbicide-concentration-dependent, decline in PGP properties (except exo-polysaccharide production) of P. putida strain PS9 was observed when the strain was grown in the presence of increasing concentrations of each herbicide. Generally, among the selected herbicides, the maximum toxicity to PGP traits of P. putida strain PS9 was shown by quizalafop-p-ethyl at three times the recommended dose. This study concludes that herbicides should be screened before field application for their degree of toxicity to PGP traits of beneficial microorganisms.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/d4f0cf676f103e33667f4b1b2514695daf0383a4

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In Plant Science

1. M. Kibret
2. M. Ahemad

Citations in the corpus

• Mechanisms and applications of plant growth promoting rhizobacteria: Current perspective (2014, background): “…2008; Russo et al., 2008; Joo et al., 2005; Murphy et al., 2000) along with the normal plant growth promoting properties such as, phytohor-mone (Ahemad and Khan, 2012c Tank and Saraf, 2010), siderophore (Jahanian et al., 2012; Tian et al., 2009), 1-amino-cyclopropane-1-carboxylate, hydrogen…”
• Remediation of metalliferous soils through the heavy metal resistant plant growth promoting bacteria: Paradigms and prospects (2014, background): “Furthermore, numerous bacteria exhibit efflux trans- porters (e.g. ATPase pumps or chemiosmotic ion/proton pumps) with high substrate affinity by which they expel high concentration of toxic metals outside the cell (Haferburg and Kothe, 2007; Ahemad, 2012).”