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Environmental Effects on Absorption and Translocation of 2,4,5-T in Winged Elm

Published online by Cambridge University Press:  12 June 2017

Gene D. Wills  and
Eddie Basler
Gene D. Wills
Affiliation:
Delta Branch Exp. St., Stoneville, Mississippi Dep. of Botany, Oklahoma Agr. Exp. Sta., Stillwater, Oklahoma
Eddie Basler
Affiliation:
Department of Botany, Oklahoma Agr. Exp. Sta., Stillwater, Oklahoma
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Abstract

The absorption and translocation of foliarly applied 14C-labeled (2,4,5-trichlorophenoxy)acetic acid (2,4,5-T-1-14C) in winged elms (Ulmus alata Michx.) as affected by season of application, air temperature, and soil moisture were determined by autoradiography of bark samples and liquid scintillation counting of leaf tissue. Treatments at 3-week intervals throughout the growing season showed highly variable trends in absorption and translocation within and between growing seasons. Seasonal variations in the absorption of 14C-2,4,5-T were similar to the variations in translocation. Translocation into the stem closely correlated with absorption into the leaves. Higher daily temperatures of 24 to 40 C appeared to enhance absorption and translocation. Variations in soil moisture showed little effect on absorption; whereas, a decrease in soil moisture reduced translocation from leaves to roots.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 4 , July 1971 , pp. 431 - 434
Copyright
Copyright © Weed Science Society of America 

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