【摘要】 对广东南岭自然保护区内野生的毛桃木莲(Manglietiamoto)、乳源木莲(M.yuyanensis)、乐昌含笑(M.chapensis)、金叶含笑(M.foveolata)和深山含笑(M.maudiae)5种木兰科芳香植物精油进行了化学成分对比分析和抗氧化活性研究。化学成分鉴定采用气质联用技术,同时结合了保留指数比较法;精油抗氧化活性采用β胡萝卜素漂白试验法。深山含笑芳香精油的主体成分以单萜烯为主,另外4种木兰科芳香精油所含成分均以倍半萜类为主。毛桃木莲和乳源木莲精油在成分构成上具有高度一致性,而且在主要成分上具有相似性,这可能表明它们具有非常近的植物亲缘关系。4种精油的抗脂质氧化半抑制浓度分别为6.6gL(毛桃木莲精油)、9.8gL(乳源木莲精油)、11.3gL)金叶含笑精油)和12.2gL(乐昌含笑精油),在本试验条件下,未能测出深山含笑的半抑制浓度。更多还原

【Abstract】 The essential oils of five Magnoliaceae plants,namely Manglietia moto Dandy,Manglietia yuyanensis Law,Michelia chapensis Dandy,Michelia foveolata Merr.ex Dandy,and Michelia maudiae Dunn,growing wild in Nanling National Nature Reserve of Guangdong province,were analyzed for their chemical composition and tested for their antioxidant effectiveness.The GC-MS analyses as well as comparison of the retention indices (RI) of elution peaks with literature data were used in compound identification of the essential oils;the β-carotene bleaching (BCB) test method was used in the preliminary evaluation of antioxidant activities for them.The M.maudiae oil characterizes high contents of monoterpenes,while other four oils are all constituted mainly by sesquiterpenoids.The high consistence of composition and similarities in major constituents between the M.moto and M.yuyanensis oils may indicate their close correlation between relatives.The 50% inhibition were accomplished with 6.6?g/L of M.moto oil,9.8?g/L of M.yuyanensis oil,11.3?g/L of M.foveolata oil and 12.2?g/L of M.chapensis oil,respectively,whereas M.maudiae oil could not inhibit 50% of the bleaching reaction under the test conditions.更多还原