Aroma Evolution during Flower Opening in Rosa damascena Mill
Aroma Evolution during Flower Opening in Rosa damascena Mill
复制标题
大马士革蔷薇花开放期间香气的演变
DOI：
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
N. Watanabe
中科院分区：
文献类型：
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作者：
Noriaki Oka;H. Ohishi;Tatsuya Hatano;M. Hornberger;K. Sakata;N. Watanabe
摘要采用顶空法和溶剂萃取法对保加利亚玫瑰花开放过程中香气成分的变化进行了监测，并对花发育和开放过程中糖苷醇类香气成分的含量和水解酶活性进行了分析。在花瓣开放时，顶空气体中的香气总量达到最高水平。在该阶段，顶空气体中香茅醇的浓度是丰富的，而2-苯基乙醇的浓度在打开阶段后4小时变得高于香茅醇的浓度。在挥发性物质中，2-苯基乙醇在此阶段的积累量高于单萜类物质，且在开花后含量仍在增加。香茅醇、香叶醇和其它单萜类化合物在开花前开始积累，然后达到最高水平。这些糖苷类化合物的含量低于挥发性提取物中的含量。在相反的单萜，2-苯乙基糖苷积累在一个更高的水平比在挥发性提取物开始至少12小时前开放阶段。在玫瑰花瓣中检测到的2-苯基乙醇糖苷前体的量在开花前总是高于2-苯基乙醇的量，后者是释放。开花期糖苷2-苯乙醇含量的下降可能是由于部分酶解所致。此后，观察到急剧下降，表明在这些阶段发生了快速的酶水解。
Abstract The changes of aroma ingredients during the process of flower opening from Bulgarian rose were monitored by head space method and solvent extraction.W e also analyzed contents of glycosidic alcoholic aroma together with activities of the hydrolytic enzymes throughout the flower development and the opening. At flower petal opening time, the total amount of aromas in the head space gas reached the highest level. The concentration of citronellol was abundant in the head space gas at this stage, whereas the concentration o f 2-phenylethanol became higher than that of citronellol 4 hr after the opening stage. In the volatile extracts, higher accumulation was observed in 2-phenylethanol than those of monoterpenoids at this stage, and the content of the former still increased after flower opening. Glycosidic citronellol, geraniol, and other m onoterpenes started their accumulation ju st before flower opening stage and then reached the maximum level. The amount of these glycosidic compounds were less than those in the volatile extracts. In contrast to the monoterpenes, 2-phenylethyl glycosides accumulated in a higher level than in the volatile extracts starting at least 12 hr before the opening stage. The amount of the glycosidic precursors of 2-phenylethanol detected in the rose petals before flower opening always was higher than the amount of 2-phenylethanol which was released later. The decline of glycosidic 2-phenylethanol at flower opening stage may be due to partial enzymatic hydrolysis. Thereafter a drastic decline was observed, indicating that rapid enzymatic hydrolysis occurred during these stages.
影响因子：
11.6
作者：
Dudareva, N;Cseke, L;Pichersky, E
通讯作者：
Pichersky, E