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Napropamide Fluxes in Corn (Zea mays) Root Tissue

Published online by Cambridge University Press:  12 June 2017

Michael Barrett  and
Floyd M. Ashton
Michael Barrett
Affiliation:
Bot. Dep., Univ. of Calif., Davis, CA 95616
Floyd M. Ashton
Affiliation:
Bot. Dep., Univ. of Calif., Davis, CA 95616
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Abstract

Napropamide [2 - (α - naphthoxy) -N,N- diethylpropionamide] influx was studied using excised root segments of corn (Zea mays L.). An initial rapid influx was followed by a slower, steady influx rate. Total influx was separated into a component that eluted from the tissue (exchangeable fraction) and a nonexchangeable fraction (residual fraction). After 5 min the residual fraction was responsible for the continued influx. In further studies with root segments this fraction was nonsaturating, increased with increased temperature, and was reduced by anaerobic conditions. The exchangeable fraction was controlled by diffusional processes. The overall influx process was attributed to an initial passive diffusion supplemented with time by a binding of napropamide into the residual fraction.

Keywords

Absorptionbindingpenetrationuptake
Type
Research Article
Information
Weed Science , Volume 31 , Issue 1 , January 1983 , pp. 43 - 48
Copyright
Copyright © 1983 Weed Science Society of America 

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