Highly Conserved Mitochondrial Genomes among Multicellular Red Algae of the Florideophyceae.
Highly Conserved Mitochondrial Genomes among Multicellular Red Algae of the Florideophyceae.
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DOI：
10.1093/gbe/evv147
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发表时间：
2015-08-04
影响因子：
3.3
通讯作者：
Yoon HS
中科院分区：
文献类型：
--
作者：
Yang EC;Kim KM;Kim SY;Lee J;Boo GH;Lee JH;Nelson WA;Yi G;Schmidt WE;Fredericq S;Boo SM;Bhattacharya D;Yoon HS
两个红藻类，Florideophyceae（约7，100种）。和Bangiophyceae（约193种），包含海洋和淡水栖息地98%的红藻多样性。这两个类在大多数系统发育分析中形成了很好的单系群。尽管如此，目间关系仍然在很大程度上未得到解决，特别是在最大的亚类Rhodymeniophyphae，包括70%的所有物种。为了阐明红藻的系统发育关系，研究红藻细胞器的进化，我们测定了红藻5个亚类11个线粒体基因组（mtDNA）的序列。将这些mtDNA与现有数据相结合，得到了一个包含25种有花植物和12种bangiophytes（包括蓝藻）的数据库。MT蛋白的串联比对被用来解决Rhodymeniophyphae中的顺序关系。红藻mtDNA基因组比较显示47个基因重排的实例，其中12个区分Bangiophyceae和Hildenbrandiophyridae，5个区分Hildenbrandiophyridae和Nemaliophyridae。这些细胞器的数据支持快速辐射和令人惊讶的高度保守的线粒体DNA基因同源性之间的形态分歧多细胞谱系的Rhodymeniophyphae。相比之下，我们发现广泛的线粒体基因重排时，比较Bangiophyceae和Florideophyceae和不同的红藻谱系之间的基因丢失的多个例子。
Two red algal classes, the Florideophyceae (approximately 7,100 spp.) and Bangiophyceae (approximately 193 spp.), comprise 98% of red algal diversity in marine and freshwater habitats. These two classes form well-supported monophyletic groups in most phylogenetic analyses. Nonetheless, the interordinal relationships remain largely unresolved, in particular in the largest subclass Rhodymeniophycidae that includes 70% of all species. To elucidate red algal phylogenetic relationships and study organelle evolution, we determined the sequence of 11 mitochondrial genomes (mtDNA) from 5 florideophycean subclasses. These mtDNAs were combined with existing data, resulting in a database of 25 florideophytes and 12 bangiophytes (including cyanidiophycean species). A concatenated alignment of mt proteins was used to resolve ordinal relationships in the Rhodymeniophycidae. Red algal mtDNA genome comparisons showed 47 instances of gene rearrangement including 12 that distinguish Bangiophyceae from Hildenbrandiophycidae, and 5 that distinguish Hildenbrandiophycidae from Nemaliophycidae. These organelle data support a rapid radiation and surprisingly high conservation of mtDNA gene syntheny among the morphologically divergent multicellular lineages of Rhodymeniophycidae. In contrast, we find extensive mitochondrial gene rearrangements when comparing Bangiophyceae and Florideophyceae and multiple examples of gene loss among the different red algal lineages.