Aurearenophyceae classis nova, a new class of heterokontophyta based on a new marine unicellular alga Aurearena cruciata gen. et sp nov inhabiting sandy beaches
Aurearenophyceae classis nova, a new class of heterokontophyta based on a new marine unicellular alga Aurearena cruciata gen. et sp nov inhabiting sandy beaches
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DOI：
10.1016/j.protis.2007.12.003
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发表时间：
2008-07-07
期刊：
影响因子：
2.5
通讯作者：
Inouye, Isao
中科院分区：
文献类型：
--
作者：
Kai, Atsushi;Yoshii, Yukie;Inouye, Isao
本文报道了异鞭毛藻一新种，十字金藻Aurearena cruciata gen.et sp. nov.与日本的桑迪隔离。通过光学显微镜和电子显微镜、色素组成光谱以及使用18 S rDNA和rbcL进行分子系统发育分析对分离株进行了表征。该菌通常具有细胞壁，但在细胞壁下也保留有两个异鞭毛。每个壁细胞首先只产生一个鞭毛细胞，随后分裂成两个鞭毛细胞。在细胞膜下观察到可能与细胞壁形成有关的电子不透明囊泡。叶绿体由两个隔室组成，每个隔室由叶绿体被膜和叶绿体内质网的内膜包围;这两个隔室由叶绿体内质网的共同外膜包围。分子系统发育树分析表明，该藻是一个新的、独立的分支，包括褐藻族和黄藻族（PX分支）。提出了一个新的纲：Aurearenophyceae classis nova.十字形。(c)2008年Elsevier GmbH。All rights reserved.
A new heterokontophyte alga, Aurearena cruciata gen. et sp. nov., was isolated from sandy beaches in Japan. Isolates were characterized by light and electron microscopy, spectroscopy of pigment composition, and molecular phylogenetic analyses using 18S rDNA and rbcL. The alga usually possessed a cell wall but also retained two heterokont flagella beneath the cell wall. Each walled cell first produced only a single flagellate cell that subsequently divided into two flagellate cells. Electronopaque vesicles, possibly associated with cell wall formation, were observed beneath the cell membrane. The chloroplast consisted of two compartments, each enclosed by a chloroplast envelope and the inner membrane of the chloroplast endoplasmic reticulum; these two compartments were surrounded by a common outer membrane of chloroplast endoplasmic reticulum. Molecular phylogenetic trees suggested that this alga was a new and independent member of the clade that included the Phaeophyceae and Xanthophyceae (PX clade). A new class, Aurearenophyceae classis nova was proposed for A. cruciata. (c) 2008 Elsevier GmbH. All rights reserved.