Cytology, palynology, and taxonomy of Asteropyrum and four other genera of Ranunculaceae
Cytology, palynology, and taxonomy of Asteropyrum and four other genera of Ranunculaceae
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DOI：
10.1111/j.1095-8339.2006.00546.x
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发表时间：
2006-09
影响因子：
2.4
通讯作者：
Qiong Yuan;Qin‐Er Yang
中科院分区：
文献类型：
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作者：
Qiong Yuan;Qin‐Er Yang
对紫星属（毛茛科）中的两个物种和可能相关的五个属（黄连属、黄连属和唐松草属各一种，唐松草属各两种）的核形态学研究揭示了紫星属和黄连属之间的密切相似性，但在一些核学特征上，紫星属和黄连、黄连属和唐松草之间存在明显差异，例如间期核的结构，染色体大小、基本染色体数量和有丝分裂前期染色体的凝聚行为。 Asteropyrum 的染色体被归类为 R 型，基本染色体数被确认为 x = 8，这表明 Asteropyrum 可能与铁卢科亚科的成员，特别是 Caltha 及其近亲有密切的亲缘关系。 Asteropyrum peltatum 和 Asteropyrum cavaleriei 在总体形态和孢粉学方面或多或少彼此不同，并且在地理分布上有些独立，尽管在它们的分布区重叠的地方出现中间形式。将它们视为 A. peltatum 的两个亚种似乎是合理的。 © 2006 伦敦林奈学会，《林奈学会植物学杂志》，2006 年，152，15–26。
A karyomorphological study of two species in Asteropyrum (Ranunculaceae) and five in presumably related genera (one each in Caltha, Coptis, and Dichocarpum and two in Thalictrum) reveals close similarities between Asteropyrum and Caltha, but obvious differences between Asteropyrum and Coptis, Dichocarpum, and Thalictrum, in some karyological features, such as the structure of the interphase nuclei, chromosome size, basic chromosome number, and condensation behaviour of chromosomes during the mitotic prophase. The chromosomes of Asteropyrum are categorized as being of the R-type and the basic chromosome number is confirmed as x = 8, indicating a possible close affinity of Asteropyrum to members in the subfamily Helleboroideae, in particular to Caltha and its allies. Asteropyrum peltatum and Asteropyrum cavaleriei are shown to be more or less differentiated from each other in gross morphology and palynology, and somewhat independent in geographical distribution, albeit with intermediate forms occurring where their distribution zones overlap. It seems justifiable to treat them as two subspecies of A. peltatum. © 2006 The Linnean Society of London, Botanical Journal of the Linnean Society, 2006, 152, 15–26.