Effect of commercial pesticides on plant growth-promoting activities of Burkholderia sp. strain L2 isolated from rhizosphere of Lycopersicon esculentum cultivated in agricultural soil

Abstract

The in vitro study was carried out to examine the toxicity of four commercially used pesticides (phorate, mancozeb, chlorpyrifos, and endosulfan) at the recommended dose (1X) and higher field doses (1.5X, 2X, 2.5X, and 3X) on plant growth-promoting activities of Burkholderia sp. strain L2, isolated from pesticide-treated rhizosphere of Lycopersicon esculentum. At the recommended dose, level of toxicity of all the pesticides to phosphate solubilization activity and indole-3-acetic acid (IAA) production was less detrimental as compared to exceeding doses. At maximum dose rate of each pesticide, the percentage decrease in phosphate solubilization and IAA production over control was found in order of chlorpyrifos < mancozeb < endosulfan < phorate. Present study proves that Burkholderia sp. strain L2 could be used as a potential microbial inoculant in the agricultural soil having persistent pesticide residues.

Keywords:

• pesticide
• toxicity
• phosphate solubilization
• indole-3-acetic acid (IAA)
• Burkholderia sp

Acknowledgements

The authors are thankful to the Indian School of Mines, Dhanbad, India for providing research facilities. Thanks are due to Ural Federal University, Ekaterinburg, Russia for providing e-research facility.

Disclosure statement

No potential conflict of interest was reported by the authors.

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Additional information

Funding

Tripti is thankful to the Indian School of Mines, Dhanbad, India for providing the fellowship.