DEVELOPMENTAL CHANGES IN CONTENT OF FOLIAR SECRETORY CAVITIES OF TAGETES ERECTA (ASTERACEAE) |
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| Authors: | William A. Russin Thomas F. Uchytil Gottfreid Feistner Richard D. Durbin |
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| Affiliation: | 1. Department of Plant Pathology, Madison, Wisconsin, 53706;2. USDA, ARS, University of Wisconsin, Madison, Wisconsin, 53706;3. Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, California, 94305;4. Department of Plant Pathology, Madison, Wisconsin, 53706 USDA, ARS, University of Wisconsin, Madison, Wisconsin, 53706 |
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| Abstract: | The quantitative and qualitative changes in the contents of foliar secretory cavities during development of Tagetes erecta CV. Moonshot plants were determined. Separation of the secretory components by HPLC yielded three major compounds, subsequently identified by mass spectroscopy, UV spectra, and cochromatography as indole, piperitenone, and piperitone. Comparison of extracts from isolated cavities vs. lamina without cavities showed that in all cases the components were absent from lamina tissues. The quantities of indole and piperitone, in general, increased as the plants developed up to the stage of early flowering, when there was a reduction in total content. At late flowering, the amounts of these components, once again, increased. Concomitantly, the amount of piperitenone decreased during plant development. At all ages studied, indole comprised at least 99% of the total secretion product. This is the first report of the secretory components being restricted to the cavities. |
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