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Mode of Action of Atrazine and Simazine in Susceptible and Resistant Lines of Corn

Published online by Cambridge University Press:  12 June 2017

Emory Ford Eastin ,
Rupert D. Palmer  and
C. O. Grogan
Emory Ford Eastin
Affiliation:
Department of Plant Pathology and Weed Science
Rupert D. Palmer
Affiliation:
Plant Pathology and Weed Science, Mississippi Agricultural Experiment Station, Mississippi State University, State College, Mississippi
C. O. Grogan
Affiliation:
Mississippi State University and Agronomist, Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture
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Abstract

Two lines of corn (Zea mays L.)—one, GT112 RfRf, resistant to 2-chloro-4-ethylamino-6-isopropylamino-s-triazine (atrazine) and 2-chloro-4,6-bis(ethylamino)-s-triazine (simazine), and the other, GT112, susceptible to both—were used. Both glucose and sucrose, supplied to the treated plant through a severed leaf tip, were found to protect GT112 from the toxic effect of atrazine and simazine. Glucose gave a slightly better protection. Oxygen uptake in excised roots of GT112 treated with atrazine gradually declined with age until death, while leaf discs of treated and untreated lines showed no distinct trend in oxygen uptake. Atrazine decreased root respiration in GT112 but had no effect on that of GT112 RfRf. Root respiration in untreated GT112 was higher than in untreated GT112 RfRf. Atrazine decreased leaf respiration when both lines were considered.

Type
Research Article
Information
Weeds , Volume 12 , Issue 1 , January 1964 , pp. 49 - 53
Copyright
Copyright © 1964 Weed Science Society of America 

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References

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