Distribution of the Character States “Early Sympetaly” and “Late Sympetaly” Within the “Sympetalae Tetracyclicae” and Presumably Allied Groups*
Distribution of the Character States “Early Sympetaly” and “Late Sympetaly” Within the “Sympetalae Tetracyclicae” and Presumably Allied Groups*
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DOI：
10.1111/j.1438-8677.1996.tb00593.x
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发表时间：
1996-10
期刊：
影响因子：
--
通讯作者：
C. Erbar;P. Leins
中科院分区：
文献类型：
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作者：
C. Erbar;P. Leins
关于花冠筒的形成，在菊科（“合瓣目Tetracyclicae”）中可以区分两种主要的发育模式，即“早期”和“晚期合瓣”。由于“合瓣性的个体发育”的特征，经过深入的研究，被证明是有价值的系统考虑，我们现在承认两个区块的目的在阿斯特里科（和相关组）：阿斯特里科A-块和阿斯特里科B-块（图1）。82和83）。总的来说，这种主要涉及花冠筒发育的二分型与最近分子数据鉴定的主要谱系很好地对应（参见，例如，Chase等人，1993年）。Asteridae A区以“晚合瓣性”为主要特征，Rubiales和Oleales的“早合瓣性”可解释为起源于该区或与Asteridae B区的“早合瓣性”有关。Asteridae B区在其早期合瓣性中是一致的。在这个区块中，它是一个原始的性状，从它偶尔出现在离瓣的Cornales和Apiales（Apiaceae，五加科，海桐科）中可以判断，这可以被认为是区块B的祖先。
: Within the Asteridae (“Sympetalae Tetracyclicae”) two main developmental patterns can be distinguished as regards the formation of corolla tubes, namely “early” and “late sympetaly”. Since the character “ontogeny of sympetaly”, after intensive studies, proved to be valuable for systematic considerations, we now recognize two blocks of orders within the Asteridae (and related groups): the Asteridae A-block and the Asteridae B-block (Figs. 82 and 83). By and large this bipartition referring mainly to the corolla tube development corresponds well with major lineages indentified by recent molecular data (see, e.g., Chase et al., 1993). Asteridae A-block is characterized predominantely by “late sympetaly” the “early sympetaly” in Rubiales and Oleales can be interpreted as derived within this block or can be linked with that in Asteridae B-block. Asteridae B-block is uniform throughout in its “early sympetaly”. In this block it is a primitive character, as judged from its occasional occurrence in the choripetalous Cornales and Apiales (Apiaceae, Araliaceae, Pittosporaceae), which can be regarded as ancestral for block B.