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Absorption and Penetration of Picloram in Potato Tuber Discs

Published online by Cambridge University Press:  12 June 2017

C. R. Swanson  and
J. R. Baur
C. R. Swanson
Affiliation:
Crops Research Division, Agr. Res. Ser., U. S. Dep. of Agr.
J. R. Baur
Affiliation:
Crops Research Division, Agr. Res. Ser., U. S. Dep. of Agr.
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Abstract

Discs of potato (Solanum tuberosum L.) tuber tissue were immersed in buffered (pH 4.0 to 8.0) solutions of 4-amino-3,5,6-trichloropicolinic acid (picloram) (5 × 10−4M to 5 × 10−3M) for 1 to 36 hr. Uptake of picloram during incubation, and leakage after return of the discs to untreated buffer, were determined by gas chromatographic analysis of extracts of the tissue and ambient buffer. Picloram absorption increased with concentration and with time up to 24 hr. Maximum uptake occurred at pH 4.0 and very little picloram was absorbed at pH 7.0 and 8.0. Both absorption and leakage were temperature dependent. The rate and extent of leakage was greatest at the highest concentration. Typically, more than 90% of the picloram absorbed from 5 × 10−3M was lost to fresh buffer within 12 hr.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 3 , July 1969 , pp. 311 - 314
Copyright
Copyright © 1969 Weed Science Society of America 

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References

Literature Cited

1. Franke, W. 1967. Mechanisms of foliar penetration of solutions. Ann. Rev. Pl. Physiol. 18:281–300.CrossRefGoogle Scholar
2. Hagen, C. E., Clagett, C. O., and Helgeson, E. A. 1949. 2,4-Dichlorophenoxyacetic acid inhibition of castor bean lipase. Science 110:116–117.Google Scholar
3. Merkle, M. G., Bovey, R. W., and Hall, R. 1966. The determination of picloram residues in soil using gas chromatography. Weeds 14:161–164.Google Scholar
4. Saunders, P. F., Jenner, C. F., and Blackman, G. E. 1966. The uptake of growth substances. VI. A comparative study of the factors determining the patterns of uptake of phenoxyacetic acid and 2,4,5-trichlorophenoxyacetic acid, weak and strong auxins, by Gossypium tissues. J. Exp. Bot. 17:241–269.CrossRefGoogle Scholar
5. Simon, E. W. and Beevers, H. 1951. The quantitative relationship between pH and the activity of weak acids and bases in biological experiments. Science 114:124–126.Google Scholar
6. Venis, M. A. and Blackman, G. E. 1966. The uptake of growth substances. VIII. Accumulation of chlorinated benzoic acids by Avena segments: A possible mechanism for the transient phase of accumulation. J. Exp. Bot. 17:771–789.CrossRefGoogle Scholar
7. Venis, M. A. and Blackman, G. E. 1966. The uptake of growth substances. IX. Further studies of the mechanism of uptake of 2,3,6-trichlorobenzoic acid by Avena segments. J. Exp. Bot. 17:790–808.Google Scholar