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Some Metabolic Responses of Rhizoctonia solani to Napropamide

Published online by Cambridge University Press:  12 June 2017

Mark E. Kurtz ,
A. Wayne Cole  and
Marvin L. Salin
Mark E. Kurtz
Affiliation:
Mississippi Agric. For. Exp. Stn., Mississippi State, MS 39762.
A. Wayne Cole
Affiliation:
Mississippi Agric. For. Exp. Stn., Mississippi State, MS 39762.
Marvin L. Salin
Affiliation:
Mississippi Agric. For. Exp. Stn., Mississippi State, MS 39762.
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Abstract

Responses of Rhizoctonia solani Kuhn to napropamide [2-(α-naphthoxy)-N,N-diethylpropionamide], were evaluated by measuring whole-cell respiration, mitochondrial respiration, ATP synthesis, and membrane leakage. Whole-cell respiration, measured with an O2 electrode, was stimulated in the presence of napropamide at 1.1, 2.2, and 4.4 × 10−5 M. Mitochondrial respiration was stimulated at 1.1 × 10−11 M, but higher concentrations were inhibitory. The addition of 10−5 M napropamide to isolated mitochondria of R. solani resulted in reduced ATP synthesis, measured by the firefly luciferase assay, and in increased membrane permeability as measured by increases in electrical conductivity of filtrates from R. solani grown in culture medium containing napropamide. These results indicate that, under laboratory conditions, napropamide reduced ATP synthesis, caused membrane leakage, and stimulated respiration in R. solani.

Keywords

MitochondrialuciferinATP synthesisrespirationmembrane
Type
Research Article
Information
Weed Science , Volume 30 , Issue 5 , September 1982 , pp. 491 - 494
Copyright
Copyright © 1982 by the Weed Science Society of America 

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