Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China.
Guangzhou Flower Research Center, Guangzhou 510360, China.
Molecules. 2021 May 13;26(10):2902. doi: 10.3390/molecules26102902.
is an important ornamental crop in the world market and its floral scent can enhance its ornamental value. To date, studies of the components and formation mechanism of the floral scent of are relatively few. In this study, the scent profiles of two varieties were measured by gas chromatograph-mass spectrometer (GC-MS). There were 32 volatile organic compounds (VOCs) identified in ', and the most abundant compound was eucalyptol (57.5%). Extremely small amounts of VOCs were detected in 'Alabama'. Compared with 'Alabama', most genes related to floral scent synthesis exhibited a higher expression in , including , , , , and In order to produce new varieties of with fragrance, 454 progenies of two crossbred combinations of '' and 'Alabama' were obtained. Four F1 generation plants with different floral scent intensities were selected for further study. The major components of floral scent in the progenies were similar to that of the parental plant. The expression patterns of genes related to floral scent synthesis were consistent with the relative contents of different types of VOCs. This study revealed the profiles of volatile compounds and associated gene expression in two cultivars and their F1 hybrids, which provided a basis for the floral scent inheritance of .
是世界市场上一种重要的观赏作物，其花香能提高其观赏价值。迄今为止，对花香成分和形成机制的研究相对较少。本研究采用气相色谱-质谱联用仪（GC-MS）测定了两个品种的花香特征。在‘’中鉴定出 32 种挥发性有机化合物（VOCs），最丰富的化合物是桉树脑（57.5%）。在‘Alabama’中检测到极少量的 VOCs。与‘Alabama’相比，大多数与花香合成相关的基因在中表现出更高的表达水平，包括、、、、和。为了生产具有香味的新品种，获得了‘’和‘Alabama’两个杂交组合的 454 个后代。选择了 4 个具有不同花香强度的 F1 代植物进行进一步研究。后代花香的主要成分与亲本植株相似。与花香合成相关的基因表达模式与不同类型 VOCs 的相对含量一致。本研究揭示了两个品种及其 F1 杂种的挥发性化合物特征和相关基因表达，为提供了花香遗传的基础。
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