Foliar phenolic glycosides from Populus fremontii,Populus angustifolia,and their hybrids |
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Institution: | 1. Department of Earth and Planetary Sciences, University of Tennessee, 1412 Circle Dr., Knoxville, TN 37996-1410, United States;2. Department of Earth and Planetary Sciences, University of California Santa Cruz, Santa Cruz, CA 95064, United States |
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Abstract: | Salicortin (1) and HCH-salicortin (2) were isolated and identified from the foliage of Populus fremontii and its F1 hybrids with Populus angustifolia. Salicortin, but not HCH-salicortin, also occurred in P. angustifolia and complex backcrosses to angustifolia. Concentrations ranged from 0 to 17.5% dry weight for salicortin and 0 to 5.9% dry weight for HCH-salicortin. HCH-salicortin may possess potent anti-herbivore activity as it contains two of the hydroxycyclohexen-on-oyl moieties known to confer such activity to salicortin. Further, this compound may be a useful chemotaxonomic character within the genus Populus, since it appears to occur in section Aigeiros but not in section Tacamahaca. |
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