Emission mechanism of floral scent in Petunia axillaris
Emission mechanism of floral scent in Petunia axillaris
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DOI：
10.1271/bbb.69.773
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发表时间：
2005-04-01
影响因子：
1.6
通讯作者：
Nakayama, M
中科院分区：
文献类型：
--
作者：
Oyama-Okubo, N;Ando, T;Nakayama, M
研究了香气日节律植物矮牵牛的花香释放机制。每种挥发性化合物的释放速率与其内源浓度同步振荡，因此花香的强度似乎由内源浓度决定。花组织和花顶间隙中的主要挥发物成分表现出明显的特征差异。挥发性化合物的沸点与其排放浓度和内源浓度的比值呈负相关，表明花香的组成直接取决于挥发性化合物的内源组成。我们认为，腋毛松花气味释放的生理调节不是通过蒸发过程，而是通过生物合成和代谢转化来控制内源挥发性物质的浓度。
The mechanism of floral scent emission was studied in Petunia axillaris, a plant with a diurnal rhythm of scent output. The emission rate of each volatile compound oscillated in synchrony with its endogenous concentration, so that the intensity of the floral scent appeared to be determined by the endogenous concentrations. The composition of major volatiles in the flower tissue and the flower headspace showed characteristic differences. A negative correlation was found between the boiling points of the volatile compounds and the ratio of their emitted and endogenous concentrations, indicating that the composition of the floral scent depends directly on the endogenous composition of the volatile compounds. We conclude that in P. axillaris, the physiological regulation of floral scent emission operates not in the vaporization process but in the control of the endogenous concentrations of volatiles through biosynthesis and metabolic conversion.