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Phloem Mobility of Xenobiotics. III. Sensitivity of Unified Model to Plant Parameters and Application to Patented Chemical Hybridizing Agents

Published online by Cambridge University Press:  12 June 2017

Francis C. Hsu  and
Daniel A. Kleier
Francis C. Hsu
Affiliation:
E. I. duPont de Nemours and Co., Experimental Stn., Agric. Products Dep., Wilmington, DE 19898
Daniel A. Kleier
Affiliation:
E. I. duPont de Nemours and Co., Experimental Stn., Agric. Products Dep., Wilmington, DE 19898
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Abstract

A refined model for the phloem translocation of xenobiotics in living plants is presented. The model accounts for the translocation of a xenobiotic that can exist in several ionic forms in terms of the permeabilities of these forms and the fractions of the forms that exist both within the sieve tubes and in the surrounding apoplast. Predictions of the model are quite sensitive to the description of the membranes used in the model, with optimum log Kow's and pKa's becoming more positive as the membranes become less permeable. The literature generally supports the predictions of the model. When applied to patented chemical hybridizing agents, the model predicts that most are phloem-mobile. This prediction strongly suggests that the chemical hybridizing agents exert their pollen-suppressing activity by direct effects on pollen and/or the surrounding maternal tissues. With low transpiration rates and the discontinuity of xylem in many reproductive tissues, phloem translocatability may be an essential requirement for the whole plant activity of many chemical hybridizing agents.

Keywords

Diuron, N′-(3,4-dichlorophenyl)-N,N-dimethylureaglyphosate, N-(phosphonomethyl)glycineamitrole, 1H-1,2,4-triazole-3-amine2,4-D, (2,4-dichlorophenoxy)acetic acidSystemic xenobioticstranslocationvascular systemintermediate permeability theoryweak acid theoryambimobility
Type
Special Topics
Information
Weed Science , Volume 38 , Issue 3 , May 1990 , pp. 315 - 323
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

Literature Cited

1. Anderson, A. G. and Lock, R. 1972. The synthesis of azetedine-3-carboxylic acid. J. Org. Chem. 37:3953–3955.Google Scholar
2. Barlin, G. B. and Perrin, D. D. 1966. Prediction of strengths of organic acids. Q. Rev. 20:75–101.Google Scholar
3. Bennett, A. B., Sweger, B. L., and Spanswick, R. M. 1984. Sink to source translocation in soybean. Plant Physiol. 74:434–436.Google Scholar
4. Bromilow, R. and Chamberlain, K. 1988. Designing molecules for systemicity. Br. Plant Growth Regulator Group. Monogr. 18.Google Scholar
5. Bromilow, R. H., Rigitano, R.L.O., Briggs, G. G., and Chamberlain, K. 1987. Phloem translocation of non-ionized chemicals in Ricinus communis . Pestic. Sci. 19:85–99.Google Scholar
6. Chamberlain, K., Butcher, D. N., and White, J. C. 1986. Relationship between chemical structure and phloem mobility in Ricinus communis var. Gibsonii with reference to a series of ω-(1-naphthoxy)-alkanoic acids. Pestic. Sci. 17:48–52.Google Scholar
7. Collander, R. 1954. The permeability of Nitella cells to nonelectrolytes. Physiol. Plant. 7:420–445.Google Scholar
8. Cox, M. M. and Jencks, W. P. 1981. Catalysis of methoxyaminolysis of phenyl acetate by a preassociation mechanism with solvent isotope effect maximum. J. Am. Chem. Soc. 103:572–580.Google Scholar
9. Crisp, C. 1972. Pages 211–264 in Tahori, A. H., ed. Proceedings of the 2nd International IUPAC Conference on Pesticide Chemistry. Vol. I. Tel Aviv, Israel.Google Scholar
10. Frick, H. J. and Pizzolato, T. D. 1987. Adaptive value of the xylem discontinuity in partitioning of photoassimilate to the grain. Bull. Torrey Bot Club. 114:252–259.Google Scholar
11. Geiger, D. R. and Fondy, B. R. 1980. Phloem loading and unloading: Pathways and mechanisms. What's New in Plant Physiol. 11:25–28.Google Scholar
12. Gougler, J. A. and Geiger, D. R. 1981. Uptake and distribution of N-phosphonoglycine in sugar beet plants. Plant Physiol. 68:668–672.Google Scholar
13. Grimm, E., Neumann, S., and Krug, B. 1987. Transport of xenobiotics in higher plants IV. Amobility of acidic compounds bromoxynil and pentachlorophenol. Biochem. Physiol. Pflanz. 182:323–332.Google Scholar
14. Hsu, F. C., Kleier, D. A., and Melander, W. H. 1988. Phloem mobility of xenobiotics. II. Bioassay testing of the unified mathematical model. Plant Physiol. 86:811–816.Google Scholar
15. Jenner, C. F., 1982. Movement of water and mass transfer into developing grains of wheat. Aust J. Plant Physiol. 69:69–82.Google Scholar
16. Katritzky, A. E. 1963. Physical Methods in Heterocyclic Chemistry. Vol. 1. Academic Press.Google Scholar
17. Kleier, D. A. 1988. Phloem mobility of xenobiotics. I. Mathematical model unifying the weak acid and intermediate permeability theories. Plant Physiol. 86:803–810.Google Scholar
18. Lee, D. R. 1986. Water in plant storage tissue. Pages 327–328 in Cronshaw, J., Lucas, W. J., and Giaquinta, R. T., eds. Phloem Transport. Alan R. Liss, New York.Google Scholar
19. Lichtner, F. T. 1986. Phloem transport of agricultural chemicals. Pages 601–608 in Cronshaw, J., Lucas, W. J., and Giaquinta, R. T., eds. Phloem Transport Alan R. Liss, New York.Google Scholar
20. Martin, R. and Edgington, L. 1981. Comparative systemic translocation of several xenobiotics and sucrose. Pestic. Biochem. Physiol. 16:87–96.CrossRefGoogle Scholar
21. MedChem Software Release 3.53.1988. CLOGP3. Medicinal Chemistry Project. Pomona College, Claremont, CA.Google Scholar
22. Mix, G. P. and Marschner, H. 1976. Calciumgehalte am Fruchten von Paprikka, Bohne, Quitte und Hagebutte im Verlauf des Fruchtwachstums. Z. Pflanzenernaehr. Bodenkd. 139:537–549.Google Scholar
23. Pate, J. S. 1984. The carbon and nitrogen nutrition of fruit and seed–case studies of selected grain legumes. Pages 41–82 in Murray, D. R., ed. Seed Physiology. Vol. 1. Academic Press, New York.Google Scholar
24. Rigitano, R.L.O., Bromilow, R. H., Briggs, G. G., and Chamberlain, K. 1987. Phloem translocation of weak acids in Ricinus communis . Pestic. Sci. 19:113–133.Google Scholar
25. Robinson-Beers, K. and Pizzolato, T. D. 1987. Development of the vascular system in the fertile floret of Anthoxanthum odoratum (Graminae). II. Sieve-element plexus, stamen traces, and the xylem discontinuity. Bot. Gaz. 148:209–220.CrossRefGoogle Scholar
26. Robinson-Beers, K. and Pizzolato, T. D. 1987. Development of the vascular system in the fertile floret of Anthoxanthum odoratum L. (Graminae). III. Vasculature supplying the gynoecium. Bot Gaz. 148:346–359.Google Scholar
27. Serjeant, E. P. and Dempsey, B. 1979. Ionisation Constants of Organic Acids in Aqueous Solution. Pergamon Press, New York.Google Scholar
28. Sparkle, P., Meggett, W. F., and Penner, D. 1975. Adsorption, mobility, and microbial degradation of glyphosate in the soil. Weed Sci. 23:229–234.Google Scholar
29. Thorne, J. H. 1981. Morphology and ultrastructure of maternal seed tissues of soybean in relation to the import of photosynthate. Plant Physiol. 67:1016–1025.Google Scholar
30. Tyree, M. T., Peterson, C. A., and Edgington, L. V. 1979. A simple model regarding ambimobility of xenobiotics with special reference to the nematicide, oxamyl. Plant Physiol. 63:367–374.Google Scholar
31. Zee, S. Y. and O'Brien, T. P. 1970. A special type of tracheary element associated with “xylem discontinuity” in the floral axis of wheat. Aust. J. Biol. Sci. 23:783–791.Google Scholar