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Effects of a phosphinothricin based herbicide on selected groups of soil microorganisms
Author(s) -
Pampulha M. E.,
Ferreira M. A. S. S.,
Oliveira A.
Publication year - 2007
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.200610274
Subject(s) - microorganism , glufosinate , microcosm , bacteria , biology , ammonium , dehydrogenase , cellulose , chemistry , microbiology and biotechnology , botany , environmental chemistry , agronomy , biochemistry , enzyme , glyphosate , genetics , organic chemistry
The effects of the herbicide glufosinate‐ammonium on soil microbial populations and activity were observed in a laboratory microcosms over a 40 day period. Culturable aerobic bacteria, fungi and actinomycetes, the fundamental groups of heterotrophic microorganisms, were studied. Nitrifiers, considered a very sensitive group to these compounds were also evaluated. Since herbicides have been found to inhibit decomposition of cellulose in the soil, the effects of glufosinate on cellulolytic bacteria and fungi were determined. Dehydrogenase activity as a measure of microbial activity was another parameter considered. Both stimulating and inhibitory effects on microbial populations were observed, depending on concentration of the herbicide and the period of incubation. A severe inhibiting effect of glufosinate on dehydrogenase activity was found. We concluded that the widespread use of this herbicide may have possible injurious effects on soil microorganisms and their activities. The toxicity exerted by glufosinate may lead to a shift in microbial community structure tending toward a significant loss in functional diversity. Dehydrogenase activity was shown to be an important indicator of glufosinate side‐effects. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)