Light-activated phytotoxic thiophenes in Flaveria linearis L.
Master of Science (MS)
First Advisor's Name
Kelsey R. Downum
First Advisor's Committee Title
Second Advisor's Name
Jennifer H. Richards
Third Advisor's Name
David W. Lee
Acetylene compounds, Plant metabolites, Phytotoxins, Botanical chemistry
Date of Defense
Chromatographic analyses of crude leaf extracts of Flaveria linearis L. revealed the presence of four acetylenic monothiophenes. Three of these metabolites were purified and structurally characterized by UV, NMR, IR, and GC-MS. Germination, growth, and survival/mortality studies with and without UVA, the activating wavelengths of these metabolites, were conducted with the crude leaf extracts and the purified compounds (taken individually and combined) against selected crop species (lettuce, radish, and carrot).
Results suggest that acetylenic metabolites are phytotoxic against lettuce, carrot, and radish, but with variability in response among species. These variations in sensitivity and the allelopathic potential of F. linearis is discussed.
Buisson-Provost, Dominique, "Light-activated phytotoxic thiophenes in Flaveria linearis L." (1990). FIU Electronic Theses and Dissertations. 1818.
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