两个园林树种的芬多精含量及其日动态变化

The content and the diurnal dynamic changes of phytoncide in two garden tree species

植物芬多精可增强人体免疫力,抑制癌细胞生长,具有较为特殊的医学功能,同时具有一定调节血压、缓解精神障碍、降低血糖、缓解疼痛、抗痉挛的保健作用。随着近年来我国森林康养产业的迅速发展,森林芬多精的研究与开发利用日益受到学者们的重视。探究森林康养植物所释放的挥发性有机物中芬多精的组成成分、相对含量及日动态变化特征,可为森林康养活动的开展和康养时间与地点的优化选择提供参考依据。以国家级森林康养基地中两个特色的森林康养植物鸡爪槭(Acer palmatum)和肉桂茶树(Camellia sinensis)为研究对象,使用动态顶空吸附采样法(dynamic headspace collection)定时定量进行样品采集,采用Entech7200预浓缩和Agilent 7890B/5977GC-MS联用仪进行分析,鉴定鸡爪槭和茶树(肉桂)这两个特色植物VOCs中芬多精的组成成分、相对含量及日动态变化特征。结果表明:两种森林康养植物的芬多精组成成分主要以烷烃类、醇类、芳香烃类、酮类、醛类、萜烯类六种挥发性有机物为主,其中占比相对较高的为烷烃类(鸡爪槭20.6%,茶树25.92%)和芳香烃类(鸡爪槭15.26%,茶树11.93%)。2种植物芬多精的重要成分萜烯类物质的相对含量鸡爪槭较高于茶树(高出0.18%),且2种植物萜烯类相对含量均表现出相同的日变化特征,即上午8:00和下午16:00的萜烯类相对含量较高,而中午12:00的相对含量最低。因此,在森林康养基地建设和森林康养植物选择时可优先选择具体高观赏价值和较高芬多精含量的鸡爪槭,且森林康养活动开展的时间于上午8:00和下午16:00的时间段开展较为适宜。

Phytopcide can enhance human immunity,inhibit the growth of cancer cells,and has special medical functions.At the same time,it has certain health care effects of regulating blood pressure,relieving mental disorders,reducing blood sugar,relieving pain and anti-spasticity.In recent years,with the rapid development of forest health and wellness industry,the research,development and utilization of forest phytopcide have been paid more and more attention by scholars.The study on the composition,relative content and diural-dynamic variation characteristics of phytopcide in volatile organic compounds released by forest health amd wellness plants can provide reference for the development of forest health activities and the optimization of the time and place of health.In this study,two forest health and wellness plants,Acer palmatum and Camellia sinensis,which are featured in the national forest health base,were taken as the research objects.Using dynamic headspace collection method timing quantitative adsorption samples,using Entech7200 preconcentration and Agilent7890B/5977GC-MS instrument analysis,to identify the composition,relative content and diurnal dynamic change characteristics of phytopcide in VOCs of A.palmatum Thunb.and C.sinensis.The results showed that the components of phytopcide of the two forest health and wellness plants were mainly alkanes,alcohols,aromatic hydrocarbons,ketones,aldehydes and terpenes,among which alkanes and aromatic hydrocarbons accounted for a relatively high proportion.The relative contents of terpenes,an important component of A.palmatum Thunb.phytopcide,were higher than those of C.sinensis,and the relative contents of terpenes of two botanies in phytopcide showed the same diurnal variation which is the relative contents of terpenes of 8:00 AM and 16:00 PM were higher,and the relative contents of 12:00 PM were the lowest.Therefore,A.palmatum Thunb.with high ornamental value and high phytopcide content can be preferred in the construction of forest health and wellness cultivation base and selection of forest health and wellness cultivation plants.It is more appropriate to carry out forestcare activities at 8:00 AM and 16:00 PM.