文心兰花香成分的分析

不同品种的文心兰(Oncidium)在香气上存在很大差异。对文心兰挥发性香气物质组成的研究,有助于了解文心兰香气的形成,及其生物合成的可能途径,为进一步研究香气代谢打下基础。研究用固相微萃取气相色谱质谱分析法对香气释放量有差异的8种文心兰进行香气成分和相对含量的测定。结果表明:8种文心兰品种花瓣挥发性香气成分总共有75种,其中有43种萜烯类物质,包含单萜类物质和倍半萜类物质及萜烯类衍生物,苯基/苯丙烷类有8种,醇酮醛类有5种,酯类有7种,其它有12种。在文心兰花瓣中香气成分中,萜烯类及其衍生物对文心兰的香气形成起非常大的作用,尤其是萜烯类的醇类衍生物。

Analysis of Aroma Components of Oncidium

There is significant difference aroma components in different Oncidium varieties.A study on the volatile aroma composition of Oncidium is helpful to understand the aroma formation and biosynthetic pathway in Oncidium,which may lay the foundation for further study of aroma metabolism.In this study,by GC-MS combined with solid phase micro extraction methods,aroma compositions and relative contents of eight varieties of Oncidium were analyzed.The results showed that there were 75 kinds of scent volatility compositions,of which 43 kinds were terpenoid substances,mainly including monoterpenes,sesquiterpenes and terpenes derivatives substances;8 kinds were phenyl/phenylpropanoid;5 kinds were alcohols,aldehydes and ketones;7 kinds were esters;12 kinds were other substances.The terpenes and theirs derivatives,particularly alcohols of terpenes derivatives,played a very big role in aroma formation of Oncidium.