Systematic implications of seed coat diversity in Gaultherieae (Ericaceae)
Systematic implications of seed coat diversity in Gaultherieae (Ericaceae)
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DOI：
10.1111/j.1095-8339.2009.01024.x
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发表时间：
2010-03
影响因子：
2.4
通讯作者：
Lu Lu-Lu;P. Fritsch;Catherine M. Bush;Li-Na Dong;Hong Wang;De-Zhu Li
中科院分区：
文献类型：
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作者：
Lu Lu-Lu;P. Fritsch;Catherine M. Bush;Li-Na Dong;Hong Wang;De-Zhu Li
利用体视显微镜和扫描电子显微镜研究了白珠族（Chamaedaphne，Diplycosia，Eubotryoides，Eubosium，Gaultheria和Leucothoe）83种植物及其近缘属（Andromedae，Andromeda和Zenobia）和越橘族（Satyria）90个样品的种子形态。种子在形状、颜色、大小、翅、种脐区、初生排列和表皮细胞等方面表现出变异。非度量多维标度（NMDS）分析的基础上选择的种子字符支持在不同的分类水平Gaultherieae内的一些群体的亲和力。种子特征证实了仙女座、Chamaedaphne、Leucothoe、Satyria和Zenobia的划分，以及白珠属的毛叶系列、Hispidulae系列、Amblyandra组和Brossaeopsis组。吝啬优化的种子性状到以前发表的系统发育估计Gaultherieae揭示，小种子已经从较大的种子和一个蜂窝状的种皮已经从一个网状的种皮演变。优化还表明，几个种子的字符状态是synapomorphies或潜在的synapomorphies的一些主要分支的Gaultherieae。东亚、北美温带和太平洋地区的白珠树族种子比热带美洲的种子更多样化。来自喜马拉雅山东部的样品在种子形态上具有最高的变异。在白皮松属植物种子中观察到的翅和鼓突的边缘细胞表明是由风传播的。(C)2010年伦敦林奈学会，林奈学会植物学杂志，2010年，162，477-495。
The seed morphology of 90 samples from 83 species of tribe Gaultherieae (Chamaedaphne, Diplycosia, Eubotryoides, Eubotrys, Gaultheria and Leucothoe) and relatives in tribes Andromedeae (Andromeda and Zenobia) and Vaccinieae (Satyria) was investigated with stereoscopic and scanning electron microscopy. Seeds exhibit variation in shape, colour, size, wing, hilum region, primary ornamentation and epidermal cells. Non-metric multidimensional scaling (NMDS) analysis based on selected seed characters supports the affinities of some groups within Gaultherieae at various taxonomic levels. Seed characters corroborate the delimitation of Andromeda, Chamaedaphne, Leucothoe, Satyria and Zenobia and Gaultheria series Trichophyllae, series Hispidulae, section Amblyandra and section Brossaeopsis. Parsimony optimization of seed characters onto a previously published phylogenetic estimate of Gaultherieae reveals that small seeds have evolved from larger seeds and an areolate seed coat has evolved from a reticulate seed coat. Optimization also suggests that several seed character states are synapomorphies or potential synapomorphies for some major clades of Gaultherieae. Seeds of Gaultherieae from East Asia, temperate North America and the Pacific are more diverse than those from tropical America. Samples from the eastern Himalaya possess the highest variation in seed morphology. The wing and bulging edge cells observed in seeds of Leucothoe suggest dispersal by wind. (C) 2010 The Linnean Society of London, Botanical Journal of the Linnean Society, 2010, 162, 477-495.