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Changes in bacterial community after application of three different herbicides

2017; Oxford University Press; Volume: 364; Issue: 13 Linguagem: Inglês

10.1093/femsle/fnx113

1574-6968

Jéssica Aparecida Silva Moretto, Lucas Miguel Altarugio, Pedro Avelino Maia de Andrade, Ana Lúcia Fachin, Fernando Dini Andreote, Eliana Guedes Stehling,

Pesticide and Herbicide Environmental Studies

The native soil microbiota is very important to maintain the quality of that environment, but with the intensive use of agrochemicals, changes in microbial biomass and formation of large quantities of toxic waste were observed in soil, groundwater and surface water. Thereby, the goal of this study was to evaluate if the selective pressure exerted by the presence of the herbicides atrazine, diuron and 2,4-D changes the bacterial community structure of an agricultural soil, using denaturing gradient gel electrophoresis technique. According to PERMANOVA analysis, a greater effect of the herbicide persistence time in the soil, the effect of the herbicide class and the effect of interaction between these two factors (persistence time and herbicide class) were observed. In conclusion, the results showed that the selective pressure exerted by the presence of these herbicides altered the composition of the local microbiota, being atrazine and diuron that most significantly affected the bacterial community in soil, and the herbicide 2,4-D was the one that less altered the microbial community and that bacterial community was reestablished first.