A MOLECULAR PHYLOGENY OF THE MARINE RED ALGAE (RHODOPHYTA) BASED ON THE NUCLEAR SMALL-SUBUNIT RIBOSOMAL-RNA GENE
A MOLECULAR PHYLOGENY OF THE MARINE RED ALGAE (RHODOPHYTA) BASED ON THE NUCLEAR SMALL-SUBUNIT RIBOSOMAL-RNA GENE
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DOI：
10.1073/pnas.91.15.7276
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发表时间：
1994-07-19
影响因子：
11.1
通讯作者：
SINGH, RK
中科院分区：
文献类型：
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作者：
RAGAN, MA;BIRD, CJ;SINGH, RK
根据15目39种红藻编码小亚单位rRNA的核基因的核苷酸序列，用多种方法推测了海洋红藻的系统发育。序列差异较大，特别是在维管束植物之间，甚至在该类群中的同源植物之间。邦氏藻科亚纲似乎是多系的，至少包括三个谱系，其中两个谱系之间分布着藻纲。亚纲为单系，由珊瑚亚纲、珊瑚亚纲和棕榈亚纲组成四个最深的分支。Ceramiales可能代表营养形态和生殖形态的融合，因为Ceramiaceae与该目的其余部分至多是弱亲缘关系，它的一个成员似乎与Gelidies结盟。除了需要更多数据的Gigartinales外，其他花芽植物目看起来都很明显，在分类学上是合理的。与基于坑塞超微结构的分类结果有很好的相关性。基于结构和化学的替代系统发育的最大似然性和简约性的测试驳斥了关于无花藻目是最原始的花植物目，而石斑目和希尔登布拉目是姐妹群的说法。
A phylogeny of marine Rhodophyta has been inferred by a number of methods from nucleotide sequences of nuclear genes encoding small subunit rRNA from 39 species in 15 orders. Sequence divergences are relatively large, especially among bangiophytes and even among congeners in this group. Subclass Bangiophycidae appears polyphyletic, encompassing at least three lineages, with Porphyridiales distributed between two of these. Subclass Florideophycidae is monophyletic, with Hildenbrandiales, Corallinales, Ahnfeltiales, and a close association of Nemaliales, Acrochaetiales, and Palmariales forming the four deepest branches. Ceramiales may represent a convergence of vegetative and reproductive morphologies, as family Ceramiaceae is at best weakly related to the rest of the order, and one of its members appears to be allied to Gelidiales. Except for Gigartinales, for which more data are required, the other florideophyte orders appear distinct and taxonomically justified. A good correlation was observed with taxonomy based on pit-plug ultrastructure. Tests under maximum-likelihood and parsimony of alternative phylogenies based on structure and chemistry refuted suggestions that Acrochaetiales is the most primitive florideophyte order and that Gelidiales and Hildenbrandiales are sister groups.