摘要
采用动态顶空套袋—吸附技术,采集东方百合‘西伯利亚’不同花期和一天不同时间点释放的花香,并利用自动热脱附—气质联用(ATD–GC/MS)技术分析花香成分和释放量。结果表明:‘西伯利亚’百合花香成分主要包括萜烯类、醇类、醛类、酮类、酯类、芳香族类和烷烃类7大类;其释放量和化合物数量在初开期较少,半开期逐渐增加,盛开期最高,衰败期急剧下降。在4个时期分别检测出12、46、55和20种成分,其中萜烯类化合物最多,释放量最大;在一天当中其释放量和化合物数量从早到晚同样表现出先增加后减少的变化,15:00—16:00时间段总释放量最高,成分最多,而在7:00—8:00和19:00—20:00这两个时间段成分及释放量明显减少;从7:00到20:00的7个时间段释放的花香中分别检测出27、42、51、57、45、40和16种化合物,萜烯类化合物最多,释放量最大。花香成分中含量最高的芳樟醇、β–罗勒烯和β–月桂烯等萜烯类化合物可能是‘西伯利亚’百合花香的主要致香成分,而光强的变化是引起‘西伯利亚’百合花香日变化的重要原因。
The floral scent of Lilium ＇Siberia＇ at different flowering stages and different time points of one day was collected using dynamic headspace collection method, and then the components and released amount were identified by automated thermal desorption - gas chromatography/mass spectrometry （ATD - GC/MS） technique. The results showed that the components of floral scent emitted from Lilium ＇Siberia＇ mainly involved seven compound categories including terpenoids, alcohols, aldehydes, ketones, esters, aromatics and alkanes. The component number and released amount was low at early opening stage, and gradually rose at middle opening stage, arriving at the peak at full opening stage, and then dropped rapidly at wilting stage. It was found that 12, 46, 55, 20 compounds were successively emitted from Lilium ＇Siberia＇ at these 4 flowering stages. Among these components, terpenoid compounds showed the most number and highest released amount. In the diurnal variation of floral scent emitted from Lilium ＇Siberia＇, the released amount and component number also showed the pattern of first increase and then decrease from dawn to dusk during one day. The total released amount and component number arrived at the peak at 15. 00---16- 00, and significantly decreased at 7.. 00---8. 00 and 19. 00---20. 00. At 7 time phases from7. 00to20. 00, 27, 42, 51, 57, 45, 40, and 16 compounds were identifled respectively, among which terpenoid compounds had the most number and the highest released amount. Among the floral scent components identified in Lilium ＇Siberia＇, the terpenoid compounds including linalool, β-ocimene,β-myrcene may be the main components contributing to the flower aroma of Lilium ＇Siberia＇, and the light intensity played a key role in the diurnal variation of floral scent.
出处
《园艺学报》
CAS
CSCD
北大核心
2013年第4期693-702,共10页
Acta Horticulturae Sinica
基金
国家自然科学基金项目(31071817)
北京市属高等学校人才强教计划项目(PXM2009-014207-076874)
关键词
百合
花香
释放量
花期
日变化
Lilium
floral scent
released amount
flowering stage
diurnal variation
