盛花期常绿钩吻藤挥发物日动态变化及其对人体生理心理健康的影响

常绿钩吻藤(Gelsemium sempervirens)为常绿木质藤本，花色金黄，气味香甜，深受百姓喜爱。探究常绿钩吻藤花香对人体生理心理健康的影响，以期为城市园林绿化中科学应用提供参考。使用动态顶空套袋法和GC-MS技术对常绿钩吻藤一天中3个时间段花香挥发物进行采集和检测，采用脑电等生理指标结合心理量表以获得直观的生理反应和自评变化。共得到花香挥发物31种，其中上午(9：00—9：30)22种，下午(13：00—13：30)20种，晚上(18：00—18：30)20种。结果显示，嗅闻常绿钩吻藤能够有效缓解人的焦虑情绪，提高人的注意力水平，调节血压。嗅闻常绿钩吻藤存在日变化差异、闻香时长差异和性别差异，闻香益处的日变化差异可能与挥发物释放的日变化差异有关。

Analysis of the Daily Dynamic Changes of the Volatile Compounds of Gelsemium sempervirens in Full Bloom and Effects on Human Physiological and Psychological Health

Gelsemium sempervirens is an evergreen woody vine with golden color and strong sweet smell, which is deeply loved by people. The impact of the flower fragrance of G. sempervirenson human physiological and mental health is explored, in order to provide reference for scientific application in urban landscaping. Dynamic headspace bagging method and GC-MS technology were used to collect and detect the volatiles of the flower fragrance of G. sempervirens in three time periods of a day, and then the human smell experiment was carried out. EEG and other physiological indexes combined with psychological scale were used to obtain intuitive physiological response and self-evaluation changes. A total of 31 kinds of floral volatiles were detected, including 22 kinds in the morning (9:00-9:30), 20 kinds in the afternoon (13:00-13:30), and 20 kinds in the evening (18:00-18:30). Results show that: smelling G. sempervirens can effectively alleviate people''s anxiety, improve people''s attention level, and regulate blood pressure. There are diurnal variation differences, duration differences, and gender differences in the aroma benefits of the volatiles from G. sempervirens. The diurnal variation differences in the aroma benefits may be related to the diurnal variation differences in the release of volatiles.