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The Leaf Concentrations of Atrazine in Cereal Crops as Related to Tolerance

Published online by Cambridge University Press:  12 June 2017

Heijia L. Wheeler  and
Robert H. Hamilton
Heijia L. Wheeler
Affiliation:
Department of Botany, the Pennsylvania State University, University Park, Pennsylvania 16802
Robert H. Hamilton
Affiliation:
Department of Botany, the Pennsylvania State University, University Park, Pennsylvania 16802
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Abstract

Seedlings of wheat (Triticum aestivum L.), corn (Zea mays L.), and sorghum (Sorghum vulgare Pers.) were exposed to 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine) in solution culture. Following prolonged treatment, the tolerant species, corn and sorghum, accumulated leaf concentrations of unaltered atrazine which were comparable to those found in the sensitive species at the point of acute toxicity. In the sensitive species, wheat, there did not seem to be a critical leaf concentration of atrazine which was necessary to bring about acute toxicity. The leaf concentration in wheat could be raised by increasing the concentration of atrazine in the nutrient solution or by lowering the temperature at which the plants were grown. The loss of chlorophyll in sensitive species was closely related to and preceded acute toxicity symptoms.

Type
Research Article
Information
Weed Science , Volume 16 , Issue 1 , January 1968 , pp. 7 - 10
Copyright
Copyright © 1968 Weed Science Society of America 

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References

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