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不同产地山苍子挥发油含量测定及差异分析
Determination and Comparative Analysis of Essential Oil Content in Litsea cubeba from Different Regions
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摘要: 以四川、云南、贵州、广西、广东、湖南、湖北、福建8个地区的山苍子为研究对象,应用气相色谱质谱联用仪(GC−MS)对其挥发油中D−柠檬烯、α−蒎烯等10种萜类化合物成分含量及差异进行分析。结果表明:不同产地的山苍子中,D−柠檬烯、(E)−柠檬醛、(Z)−柠檬醛3种萜类化合物含量较高,分别为95.05~213.79、106.60~206.13、123.90~233.32 μg/mL;桉叶油醇含量为13.78~27.86 μg/mL、芳樟醇含量为12.83~26.23 μg/mL、反式石竹烯含量为14.06~29.88 μg/mL、单萜类化合物α−蒎烯含量为10.77~16.48 μg/mL、β−蒎烯含量为10.11~15.70 μg/mL、β−月桂烯含量为17.45~28.94 μg/mL、香叶醇含量为6.24~16.60 μg/mL,且有未检出情况,说明山苍子挥发油的主要成分为柠檬烯与柠檬醛。广东、广西作为山苍子基原产地,其代表性萜类化合物含量最高,具有明显开发优势,四川和湖南2地的山苍子中代表性萜类化合物含量较高,也可作为优势种质重点关注。Abstract: This study focused on Litsea cubeba from eight regions—Sichuan, Yunnan, Guizhou, Guangxi, Guangdong, Hunan, Hubei, and Fujian—and analyzed the content and variability of 10 terpenoid compounds, including D−Limonene and α−Pinene, in their volatile oils using gas chromatography-mass spectrometry(GC−MS). The results showed that among the terpenoids in Litsea cubeba from different regions, D−Limonene,(E)-Citral, and (Z)-Citral were the most abundant, with content ranges of 95.05~213.79 μg/mL, 106.60–206.13 μg/mL, and 123.90~233.32 μg/mL, respectively. The content ranges of other compounds were as follows: Eucalyptol(13.78~27.86 μg/mL), Linalool(12.83–26.23 μg/mL), trans-Caryophyllene(14.06~29.88 μg/mL), the monoterpene α−Pinene(10.77~16.48 μg/mL), β−Pinene(10.11~15.70 μg/mL), β−Myrcene(17.45~28.94 μg/mL), and Geraniol(6.24~16.60 μg/mL), with some instances below detection limits. These results indicate that the primary components of Litsea cubeba volatile oil are limonene and citral. Furthermore, the variability analysis revealed that Guangdong and Guangxi, as the native sources of Litsea cubeba, exhibited the highest content of representative terpenoids, demonstrating significant developmental potential. Additionally, Litsea cubeba from Sichuan and Hunan also showed relatively high levels of these key terpenoids, making them noteworthy as superior germplasms. This study provides a reference for quality evaluation and further development of superior Litsea cubeba varieties.