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Metabolism of Atrazine by Susceptible and Resistant Plants

Published online by Cambridge University Press:  12 June 2017

N. S. Negi ,
H. H. Funderburk Jr.  and
D. E. Davis
N. S. Negi
Affiliation:
Auburn University Agricultural Experiment Station, Auburn, Alabama
H. H. Funderburk Jr.
Affiliation:
Auburn University Agricultural Experiment Station, Auburn, Alabama
D. E. Davis
Affiliation:
Auburn University Agricultural Experiment Station, Auburn, Alabama
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Abstract

Metabolism of C14-labeled and unlabeled atrazine (2-chloro-4-ethylamino-6-isopropylamino-s-triazine) was studied in oats, soybeans, and beans (susceptible); cotton and peanuts (intermediate in susceptibility); and Johnsongrass, grain sorghum, and corn (resistant). Atrazine residues were found in all plants 11 days after a preemergence application of 1 lb atrazine/A. Methanol was found to be a better extraction solvent for atrazine and hydroxyatrazine than chloroform. Undegraded atrazine found in plants was roughly correlated with susceptibility, but atrazine absorption was not directly correlated with plant susceptibiliy. Radioactivity remaining in plant residue after methanol extraction likewise was not completely correlated with susceptibility. All plants converted some atrazine to hydroxyatrazine and the amount of hydroxyatrazine formed was somewhat correlated with resistance. The three resistant species converted at least twice as much atrazine to hydroxyatrazine as did the susceptible soybean and oats. Beans converted considerably larger amounts of atrazine than did other susceptible species.

Type
Research Article
Information
Weeds , Volume 12 , Issue 1 , January 1964 , pp. 53 - 57
Copyright
Copyright © 1964 Weed Science Society of America 

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References

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