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Degradation of Phenoxyalkylcarboxylic Acids by White Clover (Trifolium repens) Cell Suspensions

Published online by Cambridge University Press:  12 June 2017

A. E. Smith  and
T. H. Oswald
A. E. Smith
Affiliation:
Dep. Agron., Univ. of Georgia, Experiment, GA 30212
T. H. Oswald
Affiliation:
Dep. Agron., Univ. of Georgia, Experiment, GA 30212
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Abstract

Cell suspension cultures of white clover (Trifolium repens L. ‘Regal Ladino’) were treated with 2,4-D [(2,4-dichlorophenoxy)acetic acid], 2,4-DB [4-(2,4-dichlorophenoxy)butyric acid], 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid], 2,4,5-TP [2-(2,4,5-trichlorophenoxy) propionic acid], and 2,4,5-TB [4-(2,4,5-trichlorophenoxy)butyric acid]. Cell population densities were monitored throughout the treatment period and herbicide remaining in the cells and culture medium was extracted and quantified at the termination of the treatment. Herbicide tolerance increased in cell populations which were conditioned by pretreatment with 2,4-DB and 2,4,5-T. However, 2,4-DB was rapidly degraded by all cell populations regardless of pretreatment. White clover cell suspension cultures treated with 2,4-D, 2,4-DB, 2,4,5-T, 2,4,5-TP and 2,4,5-TB metabolized the homologs, according to the following sequence: butyric acidåpropionic acidåacetic acid homologs. There was no difference in the rate of degradation of similar homologs of the 2,4-dichloro- and 2,4,5-trichloro- analogs.

Keywords

2,4-DB2,4-D2,4,5-TBsilvexforage legumes
Type
Research Article
Information
Weed Science , Volume 27 , Issue 4 , July 1979 , pp. 389 - 391
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

Literature Cited

1. Behrens, R. and Morton, H. L. 1963. Some factors influencing activity of 12 phenoxy acids on mesquite root inhibition. Plant Physiol. 38.165–170.Google Scholar
2. Gutenmann, W. H. and Lisk, D. J. 1963. Rapid determination of 4-(2,4-DB) and a metabolite, 2,4-D in treated forage by electron affinity spectroscopy. J. Agric. Food Chem. 11:304–306.Google Scholar
3. Hawf, L. R. and Behrens, R. 1974. Selectivity factors in the response of plants to 2,4-DB. Weed Sci. 22:245–249.Google Scholar
4. Oswald, T. H., Smith, A. E., and Phillips, D. V. 1977. Herbicide tolerance developed in cell suspension cultures of perennial white clover. Can. J. Bot. 55:1351–1358.Google Scholar
5. Oswald, T. H., Smith, A. E., and Phillips, D. V. 1977. Callus and plantlet regeneration from cell cultures of ladino clover and soybean. Physiol. Plant. 39:129–134.Google Scholar
6. Shaw, W. C., and Gentner, W. A. 1957. The selective herbicidal properties of several variously substituted phenoxyalkylcarboxylic acids. Weeds 5:75–92.Google Scholar
7. Szabo, S. S. 1963. The hydrolysis of 2,4-D esters by bean and corn plants. Weeds 11:292–294.Google Scholar
8. Wain, R. L. 1954. Selective weed control-some new developments at Wye. Proc. Br. Weed Control Conf. pp. 311–320.Google Scholar
9. Wain, R. L. 1955. Herbicidal selectivity through specific action of plants on compounds applied. J. Agric. Food Chem. 3:128–130.Google Scholar
10. Wain, R. L. 1955. A new approach to selective weed control. Ann. Appl. Biol. 42:151–157.Google Scholar
11. Wain, R. L. 1957. Selective weed control with MCPB. Agriculture 63:575–579.Google Scholar