科研之友
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摘要
Scent production is a rare phenomenon in the genus Camellia, which is otherwise very diverse. This study provides the first report of GC-MS analyses of the volatile compounds synthesized and emitted by six Camellia species belonging to three subgenera. Solvent extracts mainly contained derivatives of the terpenoid, phenylpropanoid and fatty acid metabolisms. Members of subgenus Metacamellia mainly accumulated 2-phenylethanol, while C. japonica of subgenus Camellia mainly synthesized monoterpenes and C. yuhsienensis of subgenus Paracamellia displayed a balanced mix of constituents. Headspace analysis of emitted volatiles confirmed the volatile composition and the rosy note of the scent of all species (due to 2-phenylethanol, (+/-) linalool and some of their derivatives). Analysis of dissected tissues revealed that stamens accumulated 3-50 times more volatiles than petals and that carpels and sepals were the weakest producers of volatiles. These latter organs were the main source of heptanol. Phenylpropanoid and terpenoid derivatives accumulated differentially in both petals and stamens. Tissue distribution differed among Camellia species.
- 出版日期2008-4
- 单位中国林业科学研究院亚热带林业研究所; 中国林业科学研究院
