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Studies on the Mechanism of s-Triazine Resistance in Common Groundsel

  • S. R. Radosevich (a1) and O. T. Devilliers (a2)


The distribution of simazine [2-chloro-4,6-bis(ethylamino)-s-triazine] in whole plants and the effect of atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] on isolated leaf cells and chloroplasts of two biotypes of common groundsel (Senecio vulgaris L.) were studied. Both biotypes accumulated 14C at the leaf margins 60 hr after exposure of roots to 14C-simazine. No difference in herbicide distribution between the two biotypes was observed. Atrazine (10 μM) inhibited photosynthesis, RNA synthesis, and lipid synthesis in isolated susceptible (S) cells but not resistant (R) cells. Lipid synthesis in S cells but not R cells was enhanced by exposure to 1 and 0.1 μM atrazine for 1 hr. Photochemical activity of R chloroplasts was not inhibited by atrazine but S chloroplasts were severely inhibited.



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1. Arnon, D.I. 1949. Copper enzymes in isolated chloroplasts. Polyphenoloxidase in Beta vulgaris . Plant Physiol. 24:115.
2. Ashton, F.A., DeVilliers, O.T., Glenn, R.K., and Duke, W.B. 1975. Localization of metabolic sites-of-action of herbicides. Pesticide Biochem. and Physiol. In Press.
3. Bordman, N.K. and Anderson, J.M. 1964. Isolation of spinach chloroplasts of particles containing different proportions of chlorophyll a and chlorophyll b and their possible role in the light reaction of photosynthesis. Nature 203:166167.
4. Davis, D.E., Funderburk, H.H., and Sansing, N.G. 1959. The absorption and translocation of 14C-labeled simazine by corn, cotton, and cucumber. Weeds 7:300309.
5. Foy, C.L. 1964. Volatility and tracer studies with alkylamino-s-triazines. Weeds 12:103108.
6. Kirk, J.T.O. 1963. The deoxyribonucleic acid of broad bean chloroplasts. Biochem. Biophy. Acta 76:417424.
7. Moreland, D.E. 1967. Mechanism of action of herbicides. Ann. Rev. Plant Physiol. 18:365386.
8. Moreland, D.E. and Hill, K.L. 1962. Interference of herbicides with the Hill reaction of isolated chloroplasts. Weeds 10:229236.
9. Moreland, D.E., Gentner, W.A., Hilton, V.L., and Hill, K.L. 1959. Studies on the mechanism of herbicidal action of 2-chloro-4,6-bis(ethylamino)-s-triazine. Plant Physiol. 34:432435.
10. Radosevich, S.R. and Appleby, A.P. 1973. Relative susceptibility of two common groundsel (Senecio vulgaris L.) biotypes to six s-triazines. Agron. J. 65:553555.
11. Radosevich, S.R. and Appleby, A.P. 1973. Studies on the mechanism of resistance to simazine in common groundsel. Weed Sci. 21:497500.
12. Shimabukuro, R.H., Lamoureux, G.L., Frear, D.S., and Bakke, J.E. 1971. Metabolism of s-triazines and its significance in biological systems. Pesticide Terminal Residues 323342.
13. Stanger, C.E. and Appleby, A.P. 1972. A proposed mechanism for diuron-induced phytotoxicity. Weed Sci. 20:357363.

Studies on the Mechanism of s-Triazine Resistance in Common Groundsel

  • S. R. Radosevich (a1) and O. T. Devilliers (a2)


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