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Detoxification of 2,4-D by Several Plant Species

Published online by Cambridge University Press:  12 June 2017

A. G. Dexter ,
F. W. Slife  and
H. S. Butler
A. G. Dexter
Affiliation:
Univ. of Ill., U-C, Urbana, Illinois North Dakota State Univ., Fargo, North Dakota 58102
F. W. Slife
Affiliation:
Univ. of Illinois at Urbana-Champaign, Urbana, Illinois 61801
H. S. Butler
Affiliation:
Univ. of Illinois at Urbana-Champaign, Urbana, Illinois 61801
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Abstract

The amount of free, unaltered (2,4-dichlorophenoxy) acetic acid (2,4-D) in resistant and susceptible plant species 1, 4, and 8 days after treatment was determined by three procedures. Centrifugation and chromatography of plant homogenates was a more reliable assay than trichloroacetic acid (TCA) precipitation or dialysis procedures. The foliar penetration of 14C-2-4-D and radioactivity which moved from roots into the growth media following foliar application of 14C-2,4-D varied from one plant species to another, but no general correlations with 2,4-D resistance was observed. The resistant burcucumber (Sicyos angulatus L.) and oats (Avena sativa L.) were not fatally injured primarily because unaltered 2,4-D was immobilized in the treated leaves and unaltered, free 2,4-D was reduced to nontoxic concentrations. The 2,4-D in susceptible cocklebur (Xanthium sp.) remained largely as free and mobile 2,4-D, and the treated plants were near death 8 days after treatment.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 6 , November 1971 , pp. 721 - 726
Copyright
Copyright © Weed Science Society of America 

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References

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