Flavonoid Variation and Speciation of the Genes Cyrtomium

贯众属分布于喜马拉雅山脉的日本。12个分类群，如C falcatum，C. fortunei，C. macrophyllum、C.本研究从日本产贯众属、贯众属和假脉草属植物中分离并鉴定了黄酮类化合物。主要化合物是两种黄酮醇，山奈酚3-O-葡萄糖苷和槲皮素3-O-葡萄糖苷，以及山奈酚和槲皮素的3-O-半乳糖苷和3-O-芸香糖苷。山奈酚3-O-葡萄糖苷-7-O-鼠李糖苷在该属中尚未报道，也从严格意义上的镰状假单胞菌中分离得到。C-糖基黄酮、异东方牡荆素、牡荆素、异牡荆素和vicemn-2及其O-糖苷也从许多分类群中检测到。从开角毛壳菌（C，develvicapulae）和光绿毛壳菌（C，laetevirens）中分离鉴定了罕见的C-甲基化黄烷酮、法瑞罗（farrerol）和环孢菌素（cytominetin）及其7-O-糖苷。虽然从广义镰状假单胞菌（C. falcatum sensu lato）中已报道了这些化合物，但本研究表明，仅在宽叶镰状假单胞菌（C. develvae capulae）中合成了黄酮类化合物，而在狭义镰状假单胞菌（C. falcatum sensu stricto）中未合成。

The genus Cyrtomium was distributed to Japan from the Himalaya. Twelve taxa e.g. C falcatum, C. fortunei, C. macrophyllum, C. microtndusium etc. are natave to Japan.In this study, flavonoids of Japanese and Chinese Cyrtomium, Cyrtogonellum and Phanerophlebia species were isolated and identified from each taxd. Major compounds are two flavonols, kaempferol 3-O-glucoside and quercetin 3-O-glucoside in addition to 3-O-galactosides and 3-O-rutinosides of kaempferol and quercetin. Kaempferol 3-O-glucoside-7-O-rhamnoside, which was not reported in this genus, was also isolated from C, falcatum sensu stricto. C-Glycosylflavones, orientm isoorientm, vitexin, isovitexin and vicemn-2 and their O-glucosides were also detected from many taxa. However, they were minor compounds and sporadical in the genus.Rare C-methylated flavanones, farrerol and cyctominetin and thier 7-O-glucosides were isolated and identified from C, devexiscapulae and C, laetevirens. Though the compounds was reported from C, falcatum sensu lato, it was shown in this survey that the flavanones are only sythesized in C, devexiscapulae but not in C, falcatum sensu stricto.