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Effect of chlorsulfuron on assimilate transport: ultrastructural implications

Published online by Cambridge University Press:  12 June 2017

Songmun Kim ,
Sangsop Han  and
William H. Vanden Born
Songmun Kim
Affiliation:
Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada T6G 2P5
Sangsop Han
Affiliation:
Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada T6G 2P5
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Abstract

To determine if cell damage could account for chlorsulfuron inhibition of assimilate transport, the ultrastructure of companion cells and surrounding mesophyll cells was examined following chlorsulfuron treatment. Six hours after treatment of canola leaves, thylakoids in companion cells were swollen and chloroplast structures in mesophyll cells were disorganized. Three days after treatment, the treated leaves contained more starch granules in companion cells than corresponding control leaves, presumably as a result of reduced assimilate export. We conclude that the inhibition of assimilate export in chlorsulfuron-treated canola leaves is associated, at least in part, with the ultrastructural changes described, particularly those in companion cells.

Keywords

Chlorsulfuron, 2-chloro-N-[[(4-methoxy-6-methyl-1,3,5-trazin-2-yl)amino]carbonyl]benzenesulfonamidecanola, Brassica napus L.Phloem loadingleaf ultrastructure
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 45 , Issue 4 , August 1997 , pp. 470 - 473
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

Literature Cited

Bestman, H. D., Devine, M. D., and Vanden Born, W. H. 1990. Herbicide chlorsulfuron reduces assimilate transport out of treated leaves of field pennycress (Thlaspi arvense L.) seedlings. Plant Physiol. 93: 1441–1448.CrossRefGoogle Scholar
Bush, D. R. 1992. The proton-sucrose symport. Photosynth. Res. 32: 155–165.Google Scholar
Chao, J. F., Quick, W. A., Hsiao, A. I., and Xie, H. S. 1994. Effect of imazamethabenz on histology and histochemistry of polysaccharides in the main shoot of wild oat (Avena fatua). Weed Sci. 42: 345–352.CrossRefGoogle Scholar
Chen, M. H. 1993. A modified autowasher device for rapidly washing large numbers of EM-grids. Microscopy Res. Tech. 26: 177–179.Google Scholar
de Agazio, M. and Giardina, A. C. 1987. Inhibition of fusicoccin-stimulated K+/H+ transport in root tips from maize seedlings pretreated with chlorsulfuron. Plant, Cell Environ. 10: 229–232.Google Scholar
Hall, L. M. and Devine, M. D. 1993. Chlorsulfuron inhibition of phloem translocation in chlorsulfuron-resistant and -susceptible Arabidopsis thaliana . Pestic. Biochem. Physiol. 45: 81–90.Google Scholar
Fayez, K. A., Gerken, I., and Kristen, U. 1994. Ultrastructural responses of root caps to the herbicides chlorsulfuron and metsulfuron methyl. Plant and Soil 167: 127–134.Google Scholar
Kim, S. 1995. Herbicidal action mechanism of chlorsulfuron in the inhibition of sucrose translocation in a susceptible species, Brassica napus L. cv Westar. . University of Alberta, Edmonton, Canada. 152 p.Google Scholar
Kim, S. and Vanden Born, W. H. 1997. Chlorsulfuron decreases both assimilate export by source leaves and import by sink leaves in canola (Brassica napus L.) seedlings. Pestic. Biochem. Physiol. In press.CrossRefGoogle Scholar
Lowther, A.J.M. 1990. Some effects of chlorsulfuron on assimilate translocation in a susceptible weed species, Thlaspi arvense L. . University of Alberta, Edmonton, Canada. 89 p.Google Scholar
Mohanty, P. and Boyer, J. S. 1976. Chloroplast response to low leaf water potentials. IV. Quantum yield is reduced. Plant Physiol. 57: 704–709.Google Scholar
Vanden Born, W. H., Bestman, H. D., and Devine, M. D. 1988. The inhibition of assimilate translocation by chlorsulfuron as a component of its mechanism of action. in Proceedings of the European Weed Research Society Symposium: “Factors Affecting Herbicide Activity and Selectivity.” Wageningen, The Netherlands: European Weed Research Society, pp. 69–74.Google Scholar