Soil amidase activity in polyacrylamide-treated soils and potential activity toward common amide-containing pesticides

La Actividad Amidasa de Suelo en Suelos Tratados con Poliacrilamido y la Actividad Potencial Hacia Pesticidas Comunes Conteniendo Amido

Kay-Shoemake, Jeanine L. and Watwood, Mary E. and Sojka, Robert E. and Lentz, Rodrick D. (2000) Soil amidase activity in polyacrylamide-treated soils and potential activity toward common amide-containing pesticides. Biology & Fertility of Soils. 31:183-186.

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Abstract

t Polyacrylamide (PAM) is currently used as
an irrigation water additive to significantly reduce the
amount of soil erosion that occurs during furrow irrigation
of crops. Elevated soil amidase activity specific toward
the large PAM polymer has been reported in
PAM-treated field soils; the substrate specificity of the
induced amidase is uncertain. PAM-treated and untreated
soils were assayed for their capacity to hydrolyze
the amide bond in carbaryl (Sevin), diphenamid
(Dymid), and naphthalene acetamide. Based on results
obtained with a soil amidase assay, there was no difference
between PAM-treated and untreated soils with respect
to the rate of amide bond hydrolysis of any of the
agrochemicals tested. It appears that under these assay
conditions the PAM-induced soil amidase is not active
toward the amide bonds within these molecules. However,
carbaryl was hydrolyzed by a different soil amidase.
To our knowledge, this is the first soil enzyme assay-based
demonstration of the hydrolysis of carbaryl
by a soil amidase.

Item Type:	Article
NWISRL Publication Number:	1014
Subjects:	Polyacrylamide (PAM) > Water-soluble PAM (WSPAM) Mass Import - autoclassified (may be erroneous)
Depositing User:	Users 6 not found.
Date Deposited:	20 Nov 2010 21:50
Last Modified:	15 Nov 2016 15:37
Item ID:	102
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/102