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Root Absorption and Translocation of Atrazine in Oats

Published online by Cambridge University Press:  12 June 2017

Richard H. Shimabukuro  and
Albert J. Linck
Richard H. Shimabukuro
Affiliation:
USDA, ARS, Metabolism and Radiation Research Laboratory, Fargo, North Dakota
Albert J. Linck
Affiliation:
Department of Plant Pathology and Physiology, University of Minnesota
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Abstract

Visible symptoms of injury in susceptible oat plants were not apparent until 4 days after initial exposure to 1 ppm 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine) solution. However, the herbicide affected normal absorption and translocation over this period of time. The expected translocation and uniform distribution of xylem transported atrazine-C14 was stopped after 2 days of exposure to atrazine. The reduction in translocation of atrazine-C14 to the shoot apices in early stages of herbicidal injury was not due to reduced asborption but very likely to some other factor such as reduced transpiration. Reduction in atrazine-C14 absorption reduced translocation to the shoot apices, but this probably was not an important factor in the early stages of injury. Absorption of atrazine-C14 by oat plants was not reduced until 3 days of exposure to atrazine. A reduction in carbohydrate concentration, resulting in injury to root tissues, may be responsible for reduction in total atrazine-C14 absorption.

Type
Research Article
Information
Weeds , Volume 15 , Issue 2 , April 1967 , pp. 175 - 178
Copyright
Copyright © 1967 Weed Science Society of America 

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References

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