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Napropamide Uptake, Transport, and Metabolism in Corn (Zea mays) and Tomato (Lycopersicon esculentum)

Published online by Cambridge University Press:  12 June 2017

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

Napropamide [2-(α-napthoxy)-N,N-diethylpropionamide] inhibited root and shoot growth in corn (Zea mays L. ‘NC+ 59’) and tomato (Lycopersicon esculentum Mill. ‘Niagara VF315’) seedlings. Shoot growth was reduced less than root growth in both species. Corn roots were approximately 10 times more sensitive to napropamide than were tomato roots. Translocation of napropamide from the roots to the shoot of tomato occurred within 0.5 h and followed an apoplastic pattern. Little movement of napropamide from the roots to the shoots occurred in corn. Metabolism of napropamide was not evident in either species during an 8-h exposure. Absorption studies showed that total napropamide levels were 60% higher in corn root tissue than in tomato root tissue. The greater napropamide content in the corn roots was associated with a tightly bound fraction of the total napropamide influx.

Keywords

Absorptionphytotoxicityselectivity
Type
Research Article
Information
Weed Science , Volume 29 , Issue 6 , November 1981 , pp. 697 - 703
Copyright
Copyright © 1981 by the Weed Science Society of America 

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References

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