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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

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