不同类型文冠果不同花期的挥发性物质及其释放量的变化规律

选取文冠果白花型无香(W-N-1)、白花型有香(W-Y-1,W-Y-2)、红花型无香(R-N-1)及红花型有香(R-Y-1)的花瓣为试材,以3-辛醇为内标,采用顶空固相微萃取和气相色谱-质谱联用技术对上述材料的香气成分进行定性定量分析。结果显示:在文冠果花中检测到7大类共42种挥发性物质,包括萜烯类16种、醇类9种、酯类7种、醛类5种、烷烃类3种、酮类1种和含N类化合物1种。文冠果不同花期的挥发物成分及其释放量的差异较大,白花型的挥发物组成比红花型的丰富,有香型和无香型文冠果的区别主要在于有无芳樟醇,总体上醇类和萜烯类成分是文冠果花香释香的关键成分,主体成分是芳樟醇。

Floral Volatile Components and Its Release Amonnt in Different Flowering Stage of Xanthoceras sorbifolium Bunge

The petals Xanthoceras sorbifolium bunge with white flower type without fragrance(W-N-1), white flower type with fragrance(W-Y-1, W-Y-2), safflower flower type without fragrance(R-N-1) and safflower flower type with fragrance(R-Y-1) were selected as test materials. Volatiles of the above materials were qualitatively and quantitatively detected with 3-octanol as an internal standard by HS-SPME-GC-MS. A total of 42 compounds were identified, and they were divided into 7 categories including 16 terpenoids, 9 alcohols, 7 esters, 5 aldehydes, 3 alkanes, 1 ketones and 1 N-containing compounds. The composition of aroma components and their relative contents of different types of X. sorbifolium at different flowering stages are quite different. The composition of aroma components of white flower type is richer than that of red flower type. The difference between scented and unscented X. sorbifolium is mainly the presence and absence of linalool. On the whole, alcohol and terpene are the key components of flower fragrance, and the main component is linalool.