期刊
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
卷 36, 期 8, 页码 646-654出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bse.2008.05.003
关键词
Lamiaceae; Origanum; flavones; flavanones; dihydroflavonols; 5,4 '-dihydroxy-6,7,3 '-trimethoxyflavanone; chemotaxonomy
Surface flavonoids in nine species of Origanum, representing taxa from all three of the currently recognised subgeneric groups, were examined both by HPLC coupled to diode-array detection and APCI-MS. Many of the flavonoids present were characterised by O-substituent at C-6 (OH, OMe) and/or C-8 (OMe). In total, 25 flavones and flavanones are described in this study, of which 13 are new to the genus and 5,4'-dihydroxy-6,7,3'-trimethoxyflavanone is reported for the first time. Taxa in subgeneric Group A accumulated flavonoids with methoxyl groups at both C-6 and C-4'; however, taxa in subgeneric Group B did not accumulate 4'-methoxylated compounds, and taxa in Group C did not accumulate 6-methoxylated compounds. (C) 2008 Elsevier Ltd. All rights reserved.
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