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Dicamba Uptake, Translocation, Metabolism, and Selectivity

Published online by Cambridge University Press:  12 June 2017

F. Y. Chang  and
W. H. Vanden Born
F. Y. Chang
Affiliation:
Formerly Department of Plant Science, University of Alberta, Edmonton, Alberta; now Department of Botany, University of Guelph, Guelph, Ontario
W. H. Vanden Born
Affiliation:
Department of Plant Science, University of Alberta, Edmonton, Alberta
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Abstract

Greenhouse studies indicated that 3,6-dichloro-o-anisic acid (dicamba) or its metabolic derivative was strongly accumulated in meristematic tissues of Tartary buckwheat (Fagopyrum tataricum (L.) Gaertn.) and wild mustard (Sinapis arvensis L.) following both foliar and root uptake. In barley (Hordeum vulgare L.) and wheat (Triticum vulgare L.), it was distributed throughout the plants. Detoxification of dicamba occurred in all four species though not at equal rates, and a common major metabolite was identified chromatographically as 5-hydroxy-3,6-dichloro-o-anisic acid. A minor metabolite, 3,6-dichlorosalicylic acid, was found in barley and wheat but not in Tartary buckwheat or wild mustard. The four species tolerated dicamba treatment in the order of wheat, barley, wild mustard, and Tartary buckwheat. This ranking corresponds with the ability of the plants to detoxify dicamba and is inversely related to the extent of dicamba absorption and translocation in them.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 1 , January 1971 , pp. 113 - 117
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

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