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Tolerance of Corn Lines to Atrazine in Relation to Content of Benzoxazinone Derivative, 2-Glucoside

Published online by Cambridge University Press:  12 June 2017

Rupert D. Palmer  and
C. O. Grogan
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

A natural product in corn, the 2-glucoside of 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one, is capable of inactivating triazine herbicides. Two essentially isogenic corn lines, Mississippi selection GT112 (susceptible to atrazine and simazine) and GT112 RfRf (resistant), contained the compound in both roots and shoots. The content of the roots was about equal for the two lines and decreased with age. In shoots of GT112 seedlings 13 to 28 days old, the 2-glucoside content reduced with time to half the original value. In shoots of GT112 RfRf, the 2-glucoside content doubled from 13 to 17 days, then decreased. Shoots of GT112 RfRf contained 1.6, 3.6, and 2.4 times more 2-glucoside at 13, 17, and 28 days, respectively, than GT112. However, 13-day-old homogenized shoots of GT112 converted 1.8 times more atrazine per μM of 2-glucoside than GT112 RfRf. Susceptibility of GT112 to triazine herbicides is not due to absence of the 2-glucoside or its inability to convert atrazine.

Type
Research Article
Information
Weeds , Volume 13 , Issue 3 , July 1965 , pp. 219 - 222
Copyright
Copyright © 1965 Weed Science Society of America 

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References

Literature Cited

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