A New Heterotrophic Cryptomonad: Hemiarma marina n. g., n. sp..
A New Heterotrophic Cryptomonad: Hemiarma marina n. g., n. sp..
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一种新的异养隐藻：Hemiarma marina n．
DOI：
10.1111/jeu.12327
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发表时间：
2016
影响因子：
2.2
通讯作者：
Ken-ichiro Ishida
中科院分区：
文献类型：
--
作者：
Takashi Shiratori;Ken-ichiro Ishida
报道了一种新的异养隐单胞菌--海半臂蟹。例如，在一个实施例中，n. sp.，其从来自帕劳共和国的海藻样品中收集。在我们利用小亚基核糖体RNA基因进行的分子系统发育分析中，H. marina形成了一个具有两个海洋环境序列的进化支，并且该进化支被放置为淡水隐藻环境进化支的姐妹谱系。另外，在连接的大小亚基核糖体RNA基因同源性中，海血吸虫被认为是角单胞菌的姐妹谱系。光镜和电镜观察表明，海蛞蝓与隐单胞体具有一些共同的超微结构特征，如扁平的线粒体嵴、周质细胞覆盖物和由两条卷曲的带状结构组成的喷射体。另一方面，海藻具有独特的行为，如后鞭毛附着在基质上、跳跃运动、周体排列和鞭毛过渡区等。根据分子生物学和形态学资料，我们认为海毛藻应作为隐藻的一个新属、新种。
We report a new heterotrophic cryptomonadHemiarma marinan. g., n. sp. that was collected from a seaweed sample from the Republic of Palau. In our molecular phylogenetic analyses using the small subunit ribosomal RNA gene,H.marinaformed a clade with two marine environmental sequences, and the clade was placed as a sister lineage of the freshwater cryptomonad environmental clade CRY1. Alternatively, in the concatenated large and small subunit ribosomal RNA gene phylogeny,H.marinawas placed as a sister lineage ofGoniomonas. Light and electron microscopic observations showed thatH.marinashares several ultrastructural features with cryptomonads, such as flattened mitochondrial cristae, a periplast cell covering, and ejectisomes that consist of two coiled ribbon structures. On the other hand,H.marinaexhibited unique behaviors, such as attaching to substrates with its posterior flagellum and displaying a jumping motion.H.marinaalso had unique periplast arrangement and flagellar transitional region. On the basis of both molecular and morphological information, we concluded thatH.marinashould be treated as new genus and species of cryptomonads.