Quantitative analysis of corolla shapes and petal contours in single-flower cultivars of lisianthus
Quantitative analysis of corolla shapes and petal contours in single-flower cultivars of lisianthus
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DOI：
10.1016/j.scienta.2009.01.024
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发表时间：
2009-06-17
影响因子：
4.3
通讯作者：
Nii, Kaeko
中科院分区：
文献类型：
--
作者：
Kawabata, Saneyuki;Yokoo, Mihoshi;Nii, Kaeko
采用椭圆傅立叶描述子结合主成分分析对216个洋桔梗品种的花冠形状进行了定量评价。第一和第二个PC值分别对应于花冠张开角和花冠轮廓的曲率，可以用来描述花冠的形状。所有216个品种的这些PC评分的散点图显示连续分布，而不是任何明显的集群。利用这两个参数，可以重建出四种典型的花冠形状：漏斗形、钟形、浅碗形和杯形。在此基础上，选择了代表这四种花冠形状的8个品种进行花瓣形状分析。花瓣形状可以通过使用分别表示花瓣宽度和加权中心的位置的第一和第二PC分数来描述。漏斗形和钟形品种的第一PC值较高，浅碗形和杯形品种的第一PC值较低。杯形品种的第二主成分含量低于浅碗形品种。然而，花瓣形状不能区分钟形和漏斗形品种。这些数据表明，花瓣形状与开花期花冠形状之间存在密切的相关性，但有些品种的花瓣轮廓相似，但三维曲率不同。(c)2009爱思唯尔有限公司版权所有。
The shape of the corolla was quantitatively evaluated in 216 cultivars of lisianthus by the use of elliptic Fourier descriptors followed by principal component (PC) analysis. The corolla's shape could be described by using the first and second PC scores, which corresponded to the corolla opening angle and the curvature of the corolla contour, respectively. The scatter plot of these PC scores for all 216 cultivars showed a continuous distribution, rather than any obvious clusters. Using these two parameters, four typical shapes of the corolla could be reconstructed: funnel-shape, bell-shape, shallow-bowl-shape, and cup-shape. Based on this analysis, 8 cultivars representing these four corolla shapes were chosen for the analysis of petal shapes. The petal shapes could be described by using the first and second PC scores representing the petal width and the position of the weighted center, respectively. The first PC was high in funnel- and bell-shaped cultivars, and low in shallow-bowl- and cup-shaped cultivars. The second PC tended to be lower in cup-shaped cultivars than shallow-bowl-shaped cultivars. However, petal shapes could not be discriminated between bell- and funnel-shaped cultivars. The data suggested a close correlation between shapes of individual petals and overall corolla shapes at anthesis, but that some cultivars have the similar petal contours with different three-dimensional curvature. (c) 2009 Elsevier B.V. All rights reserved.