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Article
Self-Limitation of Herbicide Mobility by Phytotoxic Action
Weed Science Journal
  • Donald R. Geiger, University of Dayton
  • Hank D. Bestman
Document Type
Article
Publication Date
6-1-1990
Abstract
Translocation of phloem-mobile herbicides was inhibited by their phytotoxic action on processes that maintain assimilate translocation. Glyphosate lowered import into developing sink leaves soon after it was applied to exporting sugarbeet leaves. Later, photosynthesis slowed down and starch accumulation stopped, but export of both assimilate and glyphosate continued until it was limited by starch availability at night. Experiments with field pennycress and Tartary buckwheat indicated that self-limitation of chlorsulfuron translocation probably occurred and that it resulted from lowered assimilate entry into phloem rather than from inhibition of photosynthesis or carbon allocation. Leakage of chlorsulfuron from the phloem when export was slowed down also may have contributed to its reduced translocation.
Inclusive pages
324-329
ISBN/ISSN
0043-1745
Publisher
Weed Science Society of America
Peer Reviewed
Yes
Keywords
  • carbon partitioning
Disciplines
Citation Information
Donald R. Geiger and Hank D. Bestman. "Self-Limitation of Herbicide Mobility by Phytotoxic Action" Weed Science Journal Vol. 38 Iss. 3 (1990)
Available at: http://works.bepress.com/donald_geiger/55/