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Emitted and endogenous floral scent compounds of Prunus mume and hybrids

机译：梅和杂种的内源散发的花香化合物

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摘要

Prunus mume is the only species of Prunus known to produce a strong floral fragrance. Most interspecific hybrids between P. mume and other species of Prunus lack the fragrance. The analysis of variations in emitted and endogenous compounds among genetically close cultivars is a powerful approach for revealing the mechanisms underlying floral scent emission. Compounds emitted by flowers from five cultivars were collected using the static headspace method, and endogenous compounds in the flowers were extracted with ethyl acetate. Samples were analysed quantitatively and qualitatively using gas chromatography-mass spectrometry. The result showed that benzenoids were the dominant compounds, of which benzyl acetate was the principal component contributing to the floral scent of P. mume. A clustering analysis of the floral volatiles from the different cultivars suggested that the scent traits of hybrids are related to the taxonomic relationship between their parents. The correlations between the amount of the endogenous and emitted compounds revealed that benzyl acetate had a stronger tendency to be volatile than the other compounds and the volatilisation rate of volatile compounds varied greatly among different cultivars. The importance of the biosynthetic pathway and the function of benzaldehyde are discussed
机译：李属梅是已知的能产生强烈花香的唯一李属。梅毒和其他李属之间的大多数种间杂种缺乏香气。在遗传上接近的品种中，排放和内源性化合物的变化分析是揭示花香散发机理的有效方法。使用静态顶空法收集了五个品种的花所释放的化合物，并用乙酸乙酯萃取了花中的内源性化合物。使用气相色谱-质谱法对样品进行定量和定性分析。结果表明，苯甲酮类化合物是主要化合物，其中乙酸苄酯是导致梅花香气的主要成分。对不同品种花香挥发物的聚类分析表明，杂种的香气特性与其亲本之间的分类关系有关。内源性化合物和释放出的化合物的量之间的相关性表明，乙酸苄酯具有比其他化合物更强的挥发性趋势，并且挥发性化合物的挥发速率在不同品种之间差异很大。讨论了生物合成途径的重要性和苯甲醛的功能

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