弯齿琵甲防御分泌物的化学成分测定及抗菌活性分析

弯齿琵甲Blaps femoralis Fischervon Waldheim是中国北方的优势土壤昆虫,其防御腺分泌物用于御敌和引起本种群体的集结,体外具有一定毒性,民间将该虫作为药用昆虫资源利用年代久远。由该虫防御腺体获得分泌物并经气相色谱-质谱联用技术(GC-MS)分析,共计获得14种小分子化合物,其中以2-甲基苯醌、1-十三碳烯和2,4-二甲基-3-呋喃乙酮含量较高,苯醌、苯二酚、3,5-二羟基甲苯和十二烷醛等小分子化合物次之。研究证实该分泌物具有较明显的抑菌能力。研究结果为今后进一步深入开展弯齿琵甲的防御腺化学分泌物天然产物的研究积累了工作。

Chemical composition and antibiotic activity of the defensive secretion of Blaps femoralis

Blaps femoralis Fischer yon Waldbeim is a dominant soil beetle in Northern China. Its defensive secretion is normally used for defense and aggregation in the daily activities. The secretion is toxic and has been used in natural medicines for many years. Through combined gas chromatography-mass spectroscopy technique （GC-MS）, it showed that the defensive secretion contained 14 kinds of compound. Three kinds of compound with higher amount were identified as 2- methyl- p- benzoquinone, 1-tridecene, and 1-（2, 4- dimethylfuran- 3 - yl）- ethanone. Some of remaining compounds with relative amount were identified as p-benzoquinone, hydroquinone, 3, 5-dihydroxytoluene, and dodecanal. We also found that the defensive secretion had obvious antibacterial activity. This work established foundation for future intensive study of the natural products from the defensive gland of B. femoralis.