3种石斛药材中奇数碳脂肪酸组成差异

Difference of odd-carbon fatty acid composition in three Dendrobium species

目的:研究3种石斛奇数碳脂肪酸(OCFA)成分及其含量。方法:采用气相色谱—质谱法(GC-MS)分析不同地区的金钗石斛、铁皮石斛、鼓槌石斛3种石斛的脂肪酸组成。结果:OCFA占细胞中总脂肪酸的8%,占总脂肪酸的相对丰度百分比从高到低依次为C_(15:0)、C_(17:0)、C_(23:0)、C_(19:0)、C_(21:0)。金钗石斛和铁皮石斛中C_(15:0)和C_(17:0)相对丰度的比值(C_(15:0)/C_(17:0))分别<1.6,>1.8,表明含有系列OCFA是兰科植物的共性。结论:植物中OCFA的存在可能与其药物活性具有相关性。

Objective:The fatty acid composition and content of three kinds of Dendrobium were studied in order to provide reference for the development of dendrobium efficacy.Methods:The fatty acids compositions of Dendrobium nobile,Dendrobium officinale and Dendrobium chrysotoxum from different regions were systematically quantified by gas chromatography-mass spectrometry(GC-MS),and a series of Odd-carbon fatty acids(OCFA)containing 15~23 carbons were found in all dendrobiums.Results:The results showed that the OCFA accounted for more than 8%of the total fatty acids.The relative abundances of OCFA from high to low were C_(15:0),C_(17:0),C_(23:0),C_(19:0)and C_(21:0).C_(15:0)/C_(17:0)(C_(15:0)and C_(17:0)relative abundance ratios)in D.nobile and D.officinale were less than 1.6 and more than 1.8,respectively.It was concluded that orchids contain a series of OCFA as one of the features in this family plants.Conclusion:The existence of OCFA in Dendrobium may be related to their drug activities.