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The Metabolism of C14 Chain- and Ring-Labeled Simazine by Corn and the Effect of Atrazine on Plant Respiratory Systems

Published online by Cambridge University Press:  12 June 2017

H. H. Funderburk Jr.  and
D. E. Davis
H. H. Funderburk Jr.
Affiliation:
Botany and Plant Pathology Department, Auburn University, Auburn, Alabama
D. E. Davis
Affiliation:
Botany and Plant Pathology Department, Auburn University, Auburn, Alabama
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Abstract

Chain- and ring-labeled 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine) were supplied to corn by way of the nutrient solution. Autoradiographs of the paper chromatograms revealed that two identical C14-labeled metabolites were present in the extracts whether the plants were supplied with ring-or chain-labeled simazine. Corn, cotton, and soybeans all yielded appreciable amounts of C14O2 when grown in solutions containing chain-labeled simazine. One lb/A 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine) (preemergence) caused a reduction in respiration as well as the activity of catalase, peroxidase, phenol oxidase, ascorbic acid oxidase, and glycolic acid oxidase in oats, soybeans, beans, cotton, peanuts, Johnsongrass, and corn, 7 and 11 days after treatment. Attempts to correlate enzyme activity with sensitivity to atrazine were unsuccessful, except that increasing phenol oxidase activity appeared to be roughly correlated with increasing resistance.

Type
Research Article
Information
Weeds , Volume 11 , Issue 2 , April 1963 , pp. 101 - 104
Copyright
Copyright © 1963 Weed Science Society of America 

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References

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