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Effect of pH on Foliar Uptake of 2,4,5-T-1-14C

Published online by Cambridge University Press:  12 June 2017

J. R. Baur ,
R. W. Bovey  and
Imogene Riley
J. R. Baur
Affiliation:
Agr. Res. Serv., U.S. Dep. Agr., Dep. of Range Sci., Texas A&M Univ., College Station, TX 77843
R. W. Bovey
Affiliation:
Agr. Res. Serv., U.S. Dep. Agr., Dep. of Range Sci., Texas A&M Univ., College Station, TX 77843
Imogene Riley
Affiliation:
Agr. Res. Serv., U.S. Dep. Agr., Dep. of Range Sci., Texas A&M Univ., College Station, TX 77843
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Abstract

Uptake of 2,4,5-T-1-14C [(2,4,5-trichlorophenoxy)-acetic acid] by immersion of honey mesquite [Prosopis juliflora (Swartz) DC var. glandulosa (Torr.) Cockerell] leaflets rapidly diminished as pH was increased from 3.5 to 9.5. Uptake diminished less rapidly as pH increased when 10-μl droplets were applied to leaflets that were kept moist. Uptake was equivalent from solutions of pH 3.5, 5.5, and 7.5; but severely reduced at pH 9.5, when leaflets were droplet treated and let dry. Uptake under dry conditions from pH 7.5 and 9.5 droplets containing 1 M NH4Cl was equivalent to uptake from pH 3.5 and 5.5 droplets lacking NH4Cl. NH4Cl had no enhancing effect on uptake at any pH when leaflets were immersed or droplet-treated and maintained moist. Low concentrations of urea had no enhancing effect on uptake at pH 9.5 by droplet-treated leaflets that were allowed to dry. Urea concentrations above 0.1 M inhibited uptake.

Type
Research Article
Information
Weed Science , Volume 22 , Issue 5 , September 1974 , pp. 481 - 486
Copyright
Copyright © 1974 by the Weed Science Society of America 

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References

Literature Cited

1. Audus, L.J. 1949. Studies on the pH-relationships of root growth and its inhibition by 2,4-dichlorophenoxyacetic acid and coumarin. New Phytol. 48:97–114.CrossRefGoogle Scholar
2. Baur, J.R. and Bovey, R.W. 1970. The uptake of picloram by potato tuber tissue. Weed Sci. 18:22–24.Google Scholar
3. Baur, J.R. and Bovey, R.W. 1974. An economical system for liquid scintillation counting. Anal. Biochem. (In press).CrossRefGoogle Scholar
4. Baur, J.R. Bovey, R.W., Baker, R.D., and Riley, I. 1971. Absorption and penetration of picloram and 2,4,5-T into detached live oak leaves. Weed Sci. 19:138–141.Google Scholar
5. Blackman, G.E. and Robertson-Cuninghame, R.C. 1953. The influence of pH on the phytotoxicity of 2,4-dichlorophenoxyacetic acid to Lemna minor . New Phytol. 52:71–75.Google Scholar
6. Crafts, A.S. 1953. Herbicides, their absorption and translocation. J. Agr. Food Chem. 1:51–55.Google Scholar
7. Crafts, A.S. 1961. The chemistry and mode of action of herbicides. Interscience, New York, N.Y., 269 pp.Google Scholar
8. Day, B.E. 1952. The absorption and translocation of 2,4-dichlorophenoxyacetic acid by bean plants. Plant Physiol. 27:143–152.Google Scholar
9. Gomori, G. 1955. Preparation of buffers for use in enzyme studies. Pages 138–148, in Colowick, S.P. and Kaplan, N.O., eds. Methods in enzymology, Vol. 1, Academic Press, New York, N.Y. Google Scholar
10. Greenham, C.G. 1968. Studies on herbicide contents in roots of skeleton weed (Chondrilla juncea L.) following leaf applications. Weed Res. 8:272–282.Google Scholar
11. Hamner, C.L., Lucas, E.H., and Sell, H.M. 1947. The effect of different acidity levels on the herbicidal action of the sodium salt of 2,4-dichlorophenoxyacetic acid. Mich. Quart. Bul. 29:337–342.Google Scholar
12. Hull, H.M. 1970. Leaf structure as related to absorption of pesticides and other compounds. Residue Rev. 31:111.Google Scholar
13. Jyung, W.H. and Wittwer, S.H. 1964. Foliar absorption–an active uptake process. Amer. J. Bot. 51:437–444.Google Scholar
14. Ketel, D.H. Dirkse, W.G., and Ringoet, A. 1972. Water uptake from foliar-applied drops and its further distribution in the oat leaf. Acta Bot. Neerl. 21:155–165.CrossRefGoogle Scholar
15. King, L.J. 1948. A leaf immersion technique for studying the absorption and translocation of chemicals in plants. Contrib. Boyce Thompson Inst. 15:165–171.Google Scholar
16. Marre, E., Lado, P., Caldogno, F. Rasi, and Colombo, R. 1973. Correlation between cell enlargement in pea internode segments and decrease in the pH of the medium of incubation. I. Effects of fusicoccin, natural and synthetic auxins and mannitol. Plant Sci. Letters 1:179–184.Google Scholar
17. Meyer, R.E., Morton, H.L., Haas, R.H., Robison, E.D., and Riley, T.E. 1971. Morphology and anatomy of honey mesquite. U.S. Dep. Agr., Agr. Res. Serv., Tech. Bul. 1423. 115 pp.Google Scholar
18. Orgell, W.H. and Weintraub, R.L. 1957. Influence of some ions on foliar absorption of 2,4-D. Bot. Gaz. 119:88–97.Google Scholar
19. Ringoet, A.R., Rechenmann, V., and Veen, H. 1967. Calcium movement in oat leaves measured by semi-conductor detectors. Rad. Bot. 7:81–90.Google Scholar
20. Sargent, J.A. and Blackman, G.E. 1962. Studies on foliar penetration. I. Factors controlling the entry of 2,4-dichlorophenoxyacetic acid. J. Exp. Bot. 13:348–368.Google Scholar
21. Sargent, J.A. and Blackman, G.E. 1965. Studies on foliar penetration. II. The role of light in determinong the penetration of 2,4-dichlorophenoxyacetic acid. J. Exp. Bot. 16:24–74.Google Scholar
22. Sargent, J.A., Blackman, G.E., and Martinez, A.O. 1969. Studies on foliar penetration. V. Factors controlling the penetration of 2,2-dichloropropionic acid (dalapon) into the leaves of Phaseolus vulgaris . J. Exp. Bot. 20:841–848.Google Scholar
23. Simon, E.W. and Beevers, H. 1952. The effect of pH on the biological activities of weak acids and bases. I. The most usual relationship between pH and activity. New Phytol. 51:163–190.Google Scholar
24. Simon, E.W. and Beevers, H. 1952. The effect of pH on the biological activities of weak acids and bases. II. Other relationships between pH and activity. New Phytol. 51:191–197.CrossRefGoogle Scholar
25. Steel, R.G.D. and Torrie, J.H. 1960. Principles and procedures of statistics. McGraw-Hill Book Co., New York, N.Y. 481 pp.Google Scholar
26. Swanson, C.R. and Baur, J.R. 1969. Absorption and penetration of picloram in potato tuber discs. Weed Sci. 17:311–314.Google Scholar
27. Szabo, S.S. and Buchholtz, K.P. 1961. Penetration of living and non-living surfaces by 2,4-D as influenced by ionic additives. Weeds 9:177–184.Google Scholar
28. Turner, D.J. 1972. The influence of additives on the penetration of foliar applied growth regulator herbicides. Pestic. Sci. 3:323–331.Google Scholar
29. Wedding, R.T. and Erickson, L.C. 1957. The role of pH in the permeability of chlorella to 2,4-D. Plant Physiol. 32:503–512.Google Scholar
30. Weintraub, R.L., Yeatman, J.N., Brown, J.W., Throne, J.A., Skoss, J.D., and Conover, J.R. 1954. Studies on entry of 2,4-D into leaves. Proc. N. East. Weed Contr. Conf. 8:5–10.Google Scholar