Isabelle Herre , Thomas Stegemann , Christian Zidorn
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引用次数: 0
Abstract
Betonica L. and Stachys L. are closely related genera within the Lamiaceae family, yet comparative phytochemical data on their secondary metabolites remain limited. In this study, we investigated and compared the iridoid and phenolic profiles of selected species from both genera to better understand their secondary metabolite diversity. RP-UHPLC-DAD-HRMS analyses of the methanolic extracts of three Betonica species (B. alopecuros L., B. macrantha K.Koch, and B. officinalis L.) and three Stachys species [S. arvensis (L.) L., S. byzantina K.Koch, and S. sylvatica L.] revealed pronounced differences in their secondary metabolite profiles. Chlorogenic acid, harpagide, and martynoside were detected in all investigated species. The iridoid glycoside allobetonicoside was present exclusively in the examined Betonica species, while flavone glycosides showed genus-specific patterns: isoscutellarein and hypolaetin derivatives occurred only in Stachys, whereas tricin and tricetin glucuronides were restricted to Betonica. These differences highlight distinct secondary metabolite profiles between the two genera. Allobetonicoside, tricin 7-O-glucuronide, and tricetin 3′,4′,5′-trimethyl ether-7-O-glucuronide might therefore serve as chemophenetic markers for the genus Betonica, while the presence of hypolaetin 4′-methylether 7-O-[6‴-acetylallosyl (1→2) glucoside] and isoscutellarein 7-O-[6‴-acetylallosyl (1→2) glucoside] exclusively in Stachys supports their value as marker compounds for this genus.
Tricetin 3′,4′,5′-trimethyl ether-7-O-glucuronide, which had previously only been reported from Artemisia frigida Willd. (Asteraceae) as friginoside A, was isolated from B. officinalis. A detailed analysis of the methanolic extract of B. officinalis confirmed the presence of known compounds, including the phenylpropanoids verbascoside, forsythoside B, leucosceptoside B, martynoside, betonyoside F, and stachysoside B; the iridoids harpagide, 8-O-acetylharpagide, and allobetonicoside; and the flavonoid isoorientin. These findings might contribute to chemophentically characterize the genera Betonica and Stachys.
期刊介绍:
Biochemical Systematics and Ecology is devoted to the publication of original papers and reviews, both submitted and invited, in two subject areas: I) the application of biochemistry to problems relating to systematic biology of organisms (biochemical systematics); II) the role of biochemistry in interactions between organisms or between an organism and its environment (biochemical ecology).
In the Biochemical Systematics subject area, comparative studies of the distribution of (secondary) metabolites within a wider taxon (e.g. genus or family) are welcome. Comparative studies, encompassing multiple accessions of each of the taxa within their distribution are particularly encouraged. Welcome are also studies combining classical chemosystematic studies (such as comparative HPLC-MS or GC-MS investigations) with (macro-) molecular phylogenetic studies. Studies that involve the comparative use of compounds to help differentiate among species such as adulterants or substitutes that illustrate the applied use of chemosystematics are welcome. In contrast, studies solely employing macromolecular phylogenetic techniques (gene sequences, RAPD studies etc.) will be considered out of scope. Discouraged are manuscripts that report known or new compounds from a single source taxon without addressing a systematic hypothesis. Also considered out of scope are studies using outdated and hard to reproduce macromolecular techniques such as RAPDs in combination with standard chemosystematic techniques such as GC-FID and GC-MS.