冷蒿挥发性有机化合物主要成分分析及其地上部分结构研究

冷蒿(Artemisia frigida)挥发性有机化合物(volatile organic compounds,VOCs)具有特殊气味,在植物受损伤时,此气味会更加浓烈。该文通过对未损伤与损伤冷蒿VOCs成分分析、地上部分结构观察,初步揭示了冷蒿VOCs释放与结构之间的关系。结果表明,未损伤冷蒿VOCs主要含有22种化合物,其主要成分是莰烯(14.27%)、(E)-乙酸-3-己烯酯(10.85%)、对-伞花烃(9.05%)、桉树脑(39.80%)、α-萜品醇(10.04%)、β-萜品醇(2.48%)、樟脑(5.66%)和(R)-(–)-对薄荷-1-烯-4-醇(3.84%)。损伤较未损伤冷蒿VOCs增加了12种物质,其中相对含量大于1%的化合物分别为顺-3-己烯醛(1.15%)、2-己烯醛(1.34%)、顺-牻牛儿醇(2.66%)、冰片(4.47%)、(1R,4R)(+)-对-薄荷-2,8-二烯(9.15%)、乙酸冰片酯(1.37%)和4(14),11-桉叶双烯(1.30%)。冷蒿叶片中栅栏组织发达,叶柄内具有2–3处栅栏组织,并且栅栏组织中都具有发达的气室,同时气室与气孔相连。因此,损伤较未损伤冷蒿VOCs种类和浓度增多的原因可能为:冷蒿VOCs合成后大量储存于气室中,当叶片损伤时,VOCs大量释放出来,同时合成释放一些新的VOCs,致使损伤冷蒿VOCs种类和浓度增加。

Analysis of main volatile organic compounds and study of aboveground structures in Artemisia frigida

Aims Special volatile organic compounds (VOCs) are released from Artemisia frigida in its growth, and the smell of VOCs is stronger when it is damaged. Our objective was to determine the VOCs from A. frigida and the relationship between the VOCs release and organization structure of A. frigida. Methods VOCs were collected using the dynamic headspace air-circulation method and analyzed with the thermal-desorption cold trap/gas chromatography/mass spectrum (TCT/GC/MS). The coat hairs of A. frigida were observ...