Description of new genera and species of marine cyanobacteria from the Portuguese Atlantic coast
Description of new genera and species of marine cyanobacteria from the Portuguese Atlantic coast
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DOI：
10.1016/j.ympev.2017.03.006
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发表时间：
2017-06-01
影响因子：
4.1
通讯作者：
Tamagnini, Paula
中科院分区：
文献类型：
--
作者：
Brito, Angela;Ramos, Vitor;Tamagnini, Paula
为了增加对温带地区海洋蓝藻的了解，我们以前从葡萄牙前滨分离和鉴定了60株蓝藻，并评估了它们产生次生代谢产物的潜力。约15%的16 S rRNA基因序列与数据库中的序列相似性低于97%，揭示了新的生物多样性。在此，对其中7种菌株进行了广泛表征，并重新评估了其分类。本研究导致了五个新的分类群的建议，三个属（Geminobacterium，Lusitaniella和Calenema）和两个种（Hyella patelloides和Jaaginema litorale）。大西洋双子杆菌乐歌07459是一种蓝球藻目的单细胞蓝藻，具有独特的系统发育位置和超微结构特征。Pleurocapsales Hyella patelloides乐歌07179的描述包括该属成员的新分子数据。革质卢西塔尼氏菌的丝状分离株--乐歌07167、07157和06111 --构成了一个非常独特的谱系，似乎在葡萄牙海岸普遍存在。Jaaginema literate乐歌07176与其海洋对应物相比具有明显的特征，我们的分析表明该属是复系的。集球藻Calenema singularis具有更广泛的毛状体比Leptolyngbya，其系统发育的位置加强了这个新属的建立。(C)2017爱思唯尔公司All rights reserved.
Aiming at increasing the knowledge on marine cyanobacteria from temperate regions, we previously isolated and characterized 60 strains from the Portuguese foreshore and evaluate their potential to produce secondary metabolites. About 15% of the obtained 16S rRNA gene sequences showed less than 97% similarity to sequences in the databases revealing novel biodiversity. Herein, seven of these strains were extensively characterized and their classification was re-evaluated. The present study led to the proposal of five new taxa, three genera (Geminobacterium, Lusitaniella, and Calenema) and two species (Hyella patelloides and Jaaginema litorale). Geminobacterium atlanticum LEGE 07459 is a chroococcalean that shares morphological characteristics with other unicellular cyanobacterial genera but has a distinct phylogenetic position and particular ultrastructural features. The description of the Pleurocapsales Hyella patelloides LEGE 07179 includes novel molecular data for members of this genus. The filamentous isolates of Lusitaniella coriacea - LEGE 07167, 07157 and 06111 - constitute a very distinct lineage, and seem to be ubiquitous on the Portuguese coast. Jaaginema literate LEGE 07176 has distinct characteristics compared to their marine counterparts, and our analysis indicates that this genus is polyphyletic. The Synechococcales Calenema singularis possess wider trichomes than Leptolyngbya, and its phylogenetic position reinforces the establishment of this new genus. (C) 2017 Elsevier Inc. All rights reserved.