The floral morphospace--a modern comparative approach to study angiosperm evolution.

The floral morphospace--a modern comparative approach to study angiosperm evolution.
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DOI:
10.1111/nph.12969
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发表时间:
2014-12
期刊:
The New phytologist
影响因子:
--
通讯作者:
Schönenberger J
Schönenberger J
中科院分区:
其他
文献类型:
--
作者:
Chartier M;Jabbour F;Gerber S;Mitteroecker P;Sauquet H;von Balthazar M;Staedler Y;Crane PR;Schönenberger J

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形态空间是用于研究形态多样性的演化和评估理论上可能的演化形状的数学表示。虽然在动物学中被广泛使用,但在植物科学中,特别是在植物结构和进化的大尺度模式研究中,它们-除了少数例外-被忽视了。在这里,我们提供的形态空间的方法的基本信息,我们回顾早期形态空间在植物科学中的应用,并作为一个实际的例子,我们构建和分析花形态空间。形态空间通常是可视化的排序方法的帮助下,如主成分分析(PCA)或非度量多维尺度(NMDS)。这些分析的结果,然后再加上差距指数,描述了在空间中的类群的传播。我们讨论了这些方法,并应用现代统计工具的第一个也是唯一的被子植物全花形态空间发表于1951年的Stebbins。尽管Stebbins的原始数据集的不完整性,我们的分析突出了主要的,被子植物的花形态多样性的趋势,从而证明了这种以前被忽视的方法在植物科学的力量。
Morphospaces are mathematical representations used for studying the evolution of morphological diversity and for the evaluation of evolved shapes among theoretically possible ones. Although widely used in zoology, they – with few exceptions – have been disregarded in plant science and in particular in the study of broad-scale patterns of floral structure and evolution. Here we provide basic information on the morphospace approach; we review earlier morphospace applications in plant science; and as a practical example, we construct and analyze a floral morphospace. Morphospaces are usually visualized with the help of ordination methods such as principal component analysis (PCA) or nonmetric multidimensional scaling (NMDS). The results of these analyses are then coupled with disparity indices that describe the spread of taxa in the space. We discuss these methods and apply modern statistical tools to the first and only angiosperm-wide floral morphospace published by Stebbins in 1951. Despite the incompleteness of Stebbins’ original dataset, our analyses highlight major, angiosperm-wide trends in the diversity of flower morphology and thereby demonstrate the power of this previously neglected approach in plant science.
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