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首页> 外文期刊>Magnetic resonance imaging: An International journal of basic research and clinical applications >Utility of 16S-23S ITS sequence and secondary structure for recognition of intrageneric and intergeneric limits within cyanobacterial taxa: Leptolyngbya corticola sp. nov. (pseudanabaenaceae, cyanobacteria)
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Utility of 16S-23S ITS sequence and secondary structure for recognition of intrageneric and intergeneric limits within cyanobacterial taxa: Leptolyngbya corticola sp. nov. (pseudanabaenaceae, cyanobacteria)

机译：实用程序16S-23S ITS序列和二级结构用于识别蓝细菌类群内属和属间限制：Leptolyngbya corticola sp。十一月（伪藻科，蓝细菌）

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An unusual species of Leptolyngbya was isolated from tree bark by Marie Taka?ová in 1983. Originally it was considered to be a Lyngbya species, but since revision of the Oscillatoriales (Anagnostidis & Komárek 1988), it has resided in the Culture Collection of the Czech Academy of Sciences under the tentative designation Leptolyngbya foveolarum TAKACOVA 1983/4. We have studied the morphology, ultrastructure and 16S ribosomal RNA gene sequence data for this strain and have found it to be unique among all previously described species. Analysis of 16S rRNA gene sequence data for many Leptolyngbya taxa indicates close affinity with L. boryana, L. tenerrima and L. angustata, which is consistent with the morphological similarity we have seen among the three taxa. The 16S-23S ITS regions of 19 strains in the polyphyletic taxon Leptolyngbya were sequenced and folded, and the structure and sequence of these ITS regions were highly congruent with phylogeny determined from 16S rRNA gene sequence data. This agreement provides a straightforward way of recognizing intrageneric and possibly intergeneric taxonomic diversity. This taxon has distinct 16S- 23S ITS sequences which, together with the morphological autapomorphies it possesses, are sufficient to clearly differentiate it from the three sister taxa sequenced thus far. For this strain, we propose the name L. corticola.
机译：1983年，玛丽·塔卡瓦瓦（Marie Taka？ová）从树皮中分离出一种不常见的钩端螺旋体物种。最初将其视为Lyngbya物种，但自从Oscillatoriales修订（Anagnostidis＆Komárek1988）以来，它一直保存在捷克科学院的临时名称为Leptolyngbya foveolarum TAKACOVA 1983/4。我们研究了该菌株的形态，超微结构和16S核糖体RNA基因序列数据，发现它在所有先前描述的物种中都是独特的。分析了许多鳞翅目类群的16S rRNA基因序列数据表明，它们与Boryana，L。tenerrima和L. angustata密切相关，这与我们在这三个类群中看到的形态相似性是一致的。对19个菌株的多系统分类群Leptolyngbya中的16S-23S ITS区域进行了测序和折叠，并且这些ITS区域的结构和序列与根据16S rRNA基因序列数据确定的系统发育高度一致。该协议提供了一种识别类内和类间生物分类多样性的直接方法。该分类单元具有独特的16S-23S ITS序列，连同其拥有的形态学形态，足以将其与迄今测序的三个姊妹分类单元区分开。对于此菌株，我们建议使用L. corticola。

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