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Translocation of Glyphosate, Quizalofop, and Sucrose in Quackgrass (Elytrigia repens) Biotypes

Published online by Cambridge University Press:  12 June 2017

François J. Tardif  and
Gilles D. Leroux
François J. Tardif
Affiliation:
Dep. Plant Sci., Laval Univ., Cité Universitaire, Qc, Canada G1K 7P4
Gilles D. Leroux
Affiliation:
Dep. Plant Sci., Laval Univ., Cité Universitaire, Qc, Canada G1K 7P4
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Abstract

The translocation pattern and distribution in rhizomes of 14C-glyphosate, 14C-quizalofop, and 14C-sucrose was examined in five quackgrass biotypes. Translocation of radioactivity in the different plant parts varied among biotypes. Translocation in the whole plant after treatment with the three 14C-chemicals varied among biotypes but was not correlated with their tolerance to herbicides. Detailed analysis of distribution of radioactivity in the primary rhizome showed that more 14C was found in the apical sections after treatment with 14C-sucrose. A similar pattern was observed after 14C-glyphosate application with all biotypes except one. Very low radioactivity was found in rhizomes after 14C-quizalofop application, but a preferential accumulation in apical sections of the primary rhizome was detected in two biotypes. The tolerance of one biotype to glyphosate was explained by the absence of radioactivity accumulation in the apical sections of the rhizome.

Keywords

Glyphosate, N-(phosphonomethyl)glycinequizalofop, (±)-2-[4-[(6-chloro-2-quinoxalinyl)oxy]phenoxy]propanoic acidsucrose, α-gluco-pyranosyl-β-D-fructo-furanosidequackgrass, Elytrigia repens (L.) Nevski, #3 AGRRESystemic herbicidesrhizomeperennial weedAgropyron repensAGRRE
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 41 , Issue 3 , September 1993 , pp. 341 - 346
Copyright
Copyright © 1993 by the Weed Science Society of America 

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