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Effect of Naptalam on Chloramben Toxicity, Uptake, Translocation, and Metabolism in Cucumber (Cucumis sativus)

Published online by Cambridge University Press:  12 June 2017

Larry D. Knerr ,
Herbert J. Hopen  and
Nelson E. Balke
Larry D. Knerr
Affiliation:
Dep. Hortic., Univ. Wisconsin, Madison, WI 53706
Herbert J. Hopen
Affiliation:
Dep. Hortic., Univ. Wisconsin, Madison, WI 53706
Nelson E. Balke
Affiliation:
Dep. Agron., Univ. Wisconsin, Madison, WI 53706
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Abstract

Laboratory studies demonstrated that naptalam safens cucumber against the phytotoxic effects of chloramben. In petri dish studies, cucumber seedlings grown from seeds exposed to chloramben plus naptalam had greater shoot growth, root growth, and dry weight than seedlings grown from seeds exposed to chloramben alone. Naptalam also partially reversed the reduction in dry weight of various plant parts caused by exposure of roots of hydroponically grown seedlings to chloramben. More radioactivity from root-applied 14C-chloramben remained in cucumber roots and less was translocated to shoots with a 14C-chloramben plus naptalam treatment than with a 14C-chloramben alone treatment. Naptalam appeared to influence chloramben metabolism. In various plant parts, concentrations of chloramben and its metabolites differed between the two treatments.

Keywords

Chloramben, 3-amino-2,5-dichlorobenzoic acidnaptalam, 2-[(1-naphthalenylamino)carbonyl]benzoic acidcucumber, Cucumis sativus L. ‘Addis’Herbicide safeningantidoteprotectant
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 39 , Issue 1 , March 1991 , pp. 27 - 32
Copyright
Copyright © 1991 by the Weed Science Society of America 

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