Taxonomic study of a new eustigmatophycean alga, Vacuoliviride crystalliferum gen. et sp. nov.
Taxonomic study of a new eustigmatophycean alga, Vacuoliviride crystalliferum gen. et sp. nov.
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一种新的真色藻纲 Vacuoliviride crystalliferum gen 的分类学研究。
DOI：
10.1007/s10265-014-0686-3
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发表时间：
2015
影响因子：
2.8
通讯作者：
Ken-ichiro Ishida
中科院分区：
文献类型：
--
作者：
Takeshi Nakayama;Atsushi Nakamura;Akiko Yokoyama;Takashi Shiratori;Isao Inouye;Ken-ichiro Ishida
本研究利用光镜、电子显微镜和基于18S核糖体RNA基因(RDNA)序列的分子系统发育分析，研究了高效吸收放射性铯的藻类菌株NAK-9的分类地位。该藻为球形球状，细胞壁光滑，大液泡，晶体结构，微红色球状，折射颗粒(片状小泡)。细胞具有一个到几个绿色的壁叶绿体，叶绿体周围有片状小泡包围的膨大的果核。叶绿体中有排列整齐的类囊体片层，但没有环状片层。分子系统发育分析表明，菌株NAK-9属于裸藻分支，包括弓形藻、假耳藻和棘盘菌属。根据这些结果，我们认为菌株NAK-9(NIES-2860)包含了裸子菌亚科的一个新种和新属--Vacuoliviide Crystal alvenumgen。ET sp.11月
This study investigated the taxonomic affiliation of the algal strain nak-9, which has been reported to absorb radioactive cesium with high efficiency, using light and electron microscopy, and molecular phylogenetic analysis based on 18S ribosomal RNA gene (rDNA) sequences. This alga is spherical and coccoid, with a smooth cell wall, large vacuole, crystalline structure, reddish globule, and refractile granules (lamellate vesicles). The cells possess one to several greenish parietal chloroplasts with a bulging pyrenoid surrounded by lamellate vesicles. The chloroplasts include orderly thylakoid lamellae but no girdle lamella. Molecular phylogenetic analysis suggests that strain nak-9 is a member of the eustigmatophycean clade, which includesGoniochloris,Pseudostaurastrum, andTrachydiscus. On the basis of these results, we propose that strain nak-9 (NIES-2860) comprises a new species and new genus of the Eustigmatophyceae,Vacuoliviride crystalliferumgen. et sp. nov.