Wiesneth, Stefan and Aas, Gregor and Heilmann, Joerg and Juergenliemk, Guido (2018) Investigation of the flavan-3-ol patterns in willow species during one growing-season. PHYTOCHEMISTRY, 145. pp. 26-39. ISSN 0031-9422,
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Flavonoids, proanthocyanidins (PAs) and salicylic alcohol derivatives are the main groups of ingredients in Salix needed as defensive tools and signal molecules, but have also pharmaceutical importance. The present study investigated total PA content, complete PA pattern, the oligomeric/total PAs quotient and the contents of catechin and epicatechin during one growing-season for the leaves and this year's sprouts in ten willows (Salix pentandra L. male, S. alba L. male, S. fragilis L. female, S. caprea L. male & female, S. cinerea L. male, S. caprea x cinerea male, S. daphnoides VILL. male & female and S. purpurea L. female; all Salicaceae). Comparison of the different species revealed distinct seasonal fluctuations of the oligomeric and polymeric PA fractions, but the contents of both groups always developed in the same direction. All willows prefer the synthesis of PAS with DP-2 - DP-4 within the oligomeric fraction (DP-2 - DP-10) and species with rather low PA contents like S. purpurea (0.1-2.6 mg/g) as well as species with rather high PA contents like S. alba (3.8-14.7 mg/g) were found. Only slight gender specific differences could be observed for both sexes of S. daphnoides and S. caprea. The PA pattern of the hybrid S. caprea x cinerea seems to be influenced by both parents. Thus, the accumulation of the oligomeric PAs accorded to S. caprea and the polymeric PAs matched S. cinerea resulting in an overall depression of PAs in the sprouts and a varying seasonal trend in the leaves. In contrast, the content of catechin remained high and seemed to be not influenced in the hybrid. Although only one individual of each Salix species could be considered in this screening study, the present results demonstrate the variability of the flavan-3-ol pattern within the genus Salix but also some preliminary correlations could be observed. Future studies with more Salix species will provide more insights into chemotaxonomic correlations. (C) 2017 Elsevier Ltd. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CONDENSED TANNINS; BARK EXTRACT; POLYMERIC PROCYANIDINS; ARABIDOPSIS-THALIANA; HYPERICUM-PERFORATUM; SECONDARY CHEMISTRY; PHENOLIC GLYCOSIDES; SALIX-MYRSINIFOLIA; S-ERIOCEPHALA; GENE ENCODES; Salix species; Salicaceae; Willow; Proanthocyanidins; Condensed tannins; Flavan-3-ols; Metabolomics; Chemotaxonomy |
| Subjects: | 500 Science > 540 Chemistry & allied sciences 600 Technology > 615 Pharmacy |
| Divisions: | Chemistry and Pharmacy > Institute of Pharmacy Chemistry and Pharmacy > Institute of Pharmacy > Pharmaceutical Biology (Prof. Heilmann) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 Mar 2020 12:42 |
| Last Modified: | 20 Mar 2020 12:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/15453 |
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