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The Effects of Pesticides on Bacterial Nitrogen Fixers in Peanut-Growing Area

The Effects of Pesticides on Bacterial Nitrogen Fixers in Peanut-Growing Area

Jorge Angelini, Ghio Silvina, Tania Taurian, Fernando Ibáñez, María Laura Tonelli, Lucio Valetti, María Soledad Anzuay, Liliana Ludueña, Vanina Muñoz, Adriana Fabra

Arch Microbiol. 2013 Nov;195(10-11):683-92.

PMID: 23963492

Abstract:

In the peanut production, the applications of herbicides and fungicides are a common practice. In this work, studies done under field conditions demonstrated that pesticides affected negatively the number and nitrogenase activity of diazotrophic populations of soil. Agrochemical effects were not transient, since these parameters were not recovered to pre-treatment levels even 1 year after pesticides application. Results obtained from greenhouse experiments revealed that the addition of herbicide or fungicides diminished the free-living diazotrophs number reaching levels found in soil amended with the pesticides and that the number of symbiotic diazotrophs was not affected by the insecticide assayed. The soil nitrogenase activity was not affected by fungicides and glyphosate. The effect of pesticides on the nitrogen-fixing bacteria diversity was evaluated both in field and greenhouse experiments. Analysis of clone libraries generated from the amplification of soil nifH gene showed a diminution in the genetic diversity of this bacterial community.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AS2121333	Nitrogen Pesticides			Price

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