Field degradation of aminopyralid and clopyralid and microbial community response to application in Alaskan soils

Environmental Toxicology and Chemistry
Patrick L TomcoSteven S Seefeldt

Abstract

High-latitude regions experience unique conditions that affect the degradation rate of agrochemicals in the environment. In the present study, data collected from 2 field sites in Alaska, USA (Palmer and Delta) were used to generate a kinetic model for aminopyralid and clopyralid degradation and to describe the microbial community response to herbicide exposure. Field plots were sprayed with herbicides and sampled over the summer of 2013. Quantification was performed via liquid chromatrography/tandem mass spectrometry, and microbial diversity was assessed via next-generation sequencing of bacterial 16S ribosomal ribonucleic acid (rRNA) genes. Both compounds degraded rapidly via pseudo-first-order degradation kinetics between 0 d and 28 d (t1/2  = 9.1-23.0 d), and then degradation slowed thereafter through 90 d. Aminopyralid concentration was 0.048 μg/g to 0.120 μg/g at 90 d post application, whereas clopyralid degraded rapidly at the Palmer site but was recovered in Delta soil at a concentraction of 0.046 μg/g. Microbial community diversity was moderately impacted by herbicide treatment, with the effect more pronounced at Delta. These data predict reductions in crop yield when sensitive plants (potatoes, tomatoes, marigolds, et...Continue Reading

Citations

Mar 7, 2003·Applied and Environmental Microbiology·Martina S GirvanAndrew S Ball
Mar 23, 2005·Environmental Toxicology and Chemistry·Berit GodskesenCarsten Suhr Jacobsen
Sep 30, 2005·Environmental Science & Technology·Christine M RothRené P Schwarzenbach
Sep 30, 2005·Environmental Science & Technology·Andrea CianiRené P Schwarzenbach
Dec 8, 2005·Applied and Environmental Microbiology·Catherine Lozupone, Rob Knight
Jan 13, 2006·Proceedings of the National Academy of Sciences of the United States of America·Noah Fierer, Robert B Jackson
Jul 6, 2006·Applied and Environmental Microbiology·Todd Z DeSantisG L Andersen
Jun 26, 2007·Applied and Environmental Microbiology·Qiong WangJames R Cole
Aug 30, 2008·Environmental Science and Pollution Research International·Mike NewtonIan J Tinsley
Jun 9, 2009·Applied and Environmental Microbiology·Christian L LauberNoah Fierer
Nov 17, 2009·Bioinformatics·J Gregory CaporasoRob Knight
Mar 13, 2010·PloS One·Morgan N PriceAdam P Arkin
Apr 13, 2010·Nature Methods·J Gregory CaporasoRob Knight
May 7, 2010·The ISME Journal·Johannes RouskNoah Fierer
Aug 17, 2010·Bioinformatics·Robert C Edgar
Jan 4, 2013·PloS One·Michele C Pereira e SilvaJoana Falcão Salles
Apr 5, 2013·The ISME Journal·Christian L LauberNoah Fierer
May 28, 2014·Current Opinion in Biotechnology·Carsten Suhr Jacobsen, Mathis Hjort Hjelmsø
Jun 24, 2015·BMJ Case Reports

Related Concepts

Study
Aminopyralid
Pyridines
Crops, Agricultural
Genes
rRNA Operon
Impacted Tooth
Marigold extract
Pseudo brand of pseudoephedrine
Environment

Related Feeds

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.