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Fate of Picloram in Canada Thistle, Soybean, and Barley

Published online by Cambridge University Press:  12 June 2017

M. P. Sharma  and
W. H. Vanden Born
M. P. Sharma
Affiliation:
Dep. of Plant Sci., Univ. of Alberta, Edmonton, Alberta, Canada
W. H. Vanden Born
Affiliation:
Dep. of Plant Sci., Univ. of Alberta, Edmonton, Alberta, Canada
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Abstract

Autoradiography and radioassay results indicated that 14C-picloram (14C-4-amino-3,5,6-trichloropicolinic acid) was absorbed and translocated rapidly in Canada thistle [Cirsium arvense (L.) Scop.], soybean [Glycine max (L.) Merr. ‘Harosoy 63’], and barley (Hordeum vulgare L. ‘Parkland’) following foliar or root application. Foliar absorption was much faster and more complete in soybean and Canada thistle than in barley. The radioactivity from 14C-picloram accumulated in shoot meristems in Canada thistle and soybean, whereas in barley it was distributed throughout the plant following uptake by foliage or roots. Decarboxylation of 14C-picloram by foliarly-treated Canada thistle, soybean, and barley plants did not occur in appreciable amounts. Chromatographic analysis of ethanol extracts of plants treated with 14C-picloram up to 20 days revealed no evidence of picloram metabolism by these plant species. It is concluded that differences in absorption and in distribution patterns of picloram after shoot or root uptake contribute greatly to the expression of its selective action in the species studied.

Type
Research Article
Information
Weed Science , Volume 21 , Issue 4 , July 1973 , pp. 350 - 353
Copyright
Copyright © 1973 Weed Science Society of America 

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References

Literature Cited

1. Agbakoba, C. S. O. and Goodin, J. R. 1970. Absorption and translocation of 14C-labeled 2,4-D and picloram in field bindweed. Weed Sci. 18:168–170.Google Scholar
2. Baur, J. R. and Bovey, R. W. 1969. Distribution of root-absorbed picloram. Weed Sci. 18:22–24.CrossRefGoogle Scholar
3. Chow, P. N., Burnside, O. C., Law, T. L., and Knoche, H. W. 1966. Absorption, translocation, and metabolism of silvex in prickly pear. Weeds 14:38–41.Google Scholar
4. Crafts, A. S. and Yamaguchi, S. 1964. The autoradiography of plant materials. Calif. Agr. Exp. Sta. Ext. Serv. Manual 35. 143 pp.Google Scholar
5. Eliasson, L. 1961. Responses of pea roots to growth substances. Physiol. Plant. 14:803–812.CrossRefGoogle Scholar
6. Hamaker, J. W., Johnston, H., Martin, R. T., and Redmann, C. T. 1963. A picolinic acid derivative: plant growth regulator. Science 141:363.Google Scholar
7. Hamill, A. S., Smith, L. W., and Switzer, C. M. 1972. Influence of phenoxy herbicides on picloram uptake and phytotoxicity. Weed Sci. 20:226–229.Google Scholar
8. Hurtt, W. and Foy, C. L. 1965. Some factors influencing the excretion of foliarly applied dicamba and picloram from roots of Black Valentine beans. Plant Physiol. (Suppl.) 40:48.Google Scholar
9. Isensee, A. R., Jones, G. E., and Turner, B. C. 1971. Root absorption and translocation of picloram by oats and soybeans. Weed Sci. 19:727–731.Google Scholar
10. Malhotra, S. S. and Hanson, J. B. 1970. Picloram sensitivity and nucleic acids in plants. Weed Sci. 18:1–4.CrossRefGoogle Scholar
11. Meikle, R. W., Williams, E. A., and Redmann, C. T. 1966. Metabolism of Tordon herbicide (4-amino-3,5,6-trichloropicolinic acid) in cotton and decomposition in soil. J. Agr. Food Chem. 14:384–387.Google Scholar
12. Redmann, C. T., Meikle, R. W., Hamilton, P., Banks, W. S., and Youngson, C. R. 1968. The fate of 4-amino-3,5,6-trichloropicolinic acid in spring wheat and soil. Bull. Environ. Contam. Toxicol. 3:80–96.Google Scholar
13. Sargent, J. A. and Blackman, G. E. 1970. Studies on foliar penetration. VI. Factors controlling the penetration of 4-amino-3,5,6-trichloropicolinic acid (picloram) into the leaves of Phaseolus vulgaris . J. Exp. Bot. 21:219–227.Google Scholar
14. Scott, P. C. and Morris, R. O. 1970. Quantitative distribution and metabolism of auxin herbicides in roots. Plant Physiol. 46:680–684.Google Scholar
15. Sharma, M. P., Chang, F. Y., and Vanden Born, W. H. 1971. Penetration and translocation of picloram in Canada thistle. Weed Sci. 19:349–355.Google Scholar
16. Sharma, M. P. and Vanden Born, W. H. 1970. Foliar penetration of picloram and 2,4-D in aspen and balsam poplar. Weed Sci. 18:57–63.Google Scholar
17. Sharma, M. P. and Vanden Born, W. H. 1970. Effect of picloram on 14CO2-fixation and translocation of 14C-assimilates in Canada thistle, soybean, and corn. Can. J. Bot. 49:69–74.Google Scholar