4个桂花品种鲜花挥发物成分TDS-GC-MS分析

采用动态顶空气体循环采集法和TDS - GC - MS联用技术对金桂(Osmanthus fragrans var.thunbergii)、银桂(O.fragrans var.latifolius)、丹桂(O.fragrans var.aurantiacus)和四季桂(D.fragrans var.semperflorens)4个品种的鲜花挥发物(VOCs)成分进行分析.结果表明:金桂VOCs中主要成分为(Z)-β-罗勒烯(相对含量20.6％)、β-紫罗兰酮(13.8％)、β-蒎烯(11.0％)和柠檬烯(7.3％)；银桂主要为B-紫罗兰酮(39.7％)、γ-癸内酯(8.9％)、α-紫罗兰酮(8.6％)和(Z)-乙酸-3-已烯酯(6.9％)；丹桂主要为β-蒎烯(17.2％)、柠檬烯(11.2％)、(Z)-β-罗勒烯(8.2％)和(E)-B-罗勒烯(6.1％)；四季桂主要为β-紫罗兰酮(15.7％)、α-紫罗兰酮(8.2％)、β-蒎烯(7.2％)和(Z)-β-罗勒烯(6.7％).不同桂花品种鲜花VOCs的成分及其相对含量不同.研究结果将为桂花品种资源保护、开发及园林配置提供一定的理论依据.

TDS - GC - MS ANALYSIS OF VOLATILE ORGANIC COMPOUNDS FROM THE FRESH FLOWERS OF FOUR Osmanthus fragrans VARIETIES

The volatile organic compounds(VOCs) from the fresh flowers of four Osmanthus fragrans varieties,O.fragrans var.thunbergii,O.fragrans var.latifolius,O.fragrans var.aurantiacus and O.fragrans var.semperflorens,were analyzed using dynamic headspace collecting and TDS-GC-MS.Results showed that the major VOCs were as follows:(Z)-β-ocimene(relative content of 20.6%),β-ionone(13.8%),β-pinene(11.0%),and D-limonene(7.3%) in O.fragrans var.thunbergii;β-ionone(39.7%),γ-decanolactone(8.9%),α-ionone(8.6%),and(Z)-acetate-3-hexen-1-ol(6.9%) in O.fragrans var.latifolius;β-pinene(17.2%),D-limonene(11.2%),(Z)-β-ocimene(8.2%),and(E)-β-ocimene(6.1%) in O.fragrans var.aurantiacus;and β-ionone(15.7%),α-ionone(8.2%),β-pinene(7.2%),and(Z)-β-ocimene(6.7%) in O.fragrans var.semperflorens.VOCs constituents and relative content from the different fresh flowers of O.fragrans varieties were different.The studying results will give some theoretical bases for O.fragrans varieties resources protection,development and landscape plant configuration.