首页> 外文期刊>Harmful Algae >Molecular characterization and morphology of Cochlodinium strangulatum, the type species of Cochlodinium, and Margalefidinium gen. nov for C. polykrikoides and allied species (Gymnodiniales, Dinophyceae)
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Molecular characterization and morphology of Cochlodinium strangulatum, the type species of Cochlodinium, and Margalefidinium gen. nov for C. polykrikoides and allied species (Gymnodiniales, Dinophyceae)

机译:Cochlodinium strangulatum,Cochlodinium的类型种和Margalefidinium gen的分子特征和形态。 C. polykrikoides和相关物种(Gymnodiniales,Dinophyceae)的nov

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摘要

Photosynthetic species of the dinoflagellate genus Cochlodinium such as C. polykrikoides, one of the most harmful bloom-forming dinoflagellates, have been extensively investigated. Little is known about the heterotrophic forms of Cochlodinium, such as its type species, Cochlodinium strangulatum. This is an uncommon, large (similar to 200 mu m long), solitary, and phagotrophic species, with numerous refractile bodies, a central nucleus enclosed in a distinct perinuclear capsule, and a cell surface with fine longitudinal striae and a circular apical groove. The morphology of C polykrikoides and allied species is different from the generic type. It is a bloom-forming species with single, two or four-celled chains, small cell size (2540 [Am long) with elongated chloroplasts arranged longitudinally and in parallel, anterior nucleus, eyespot in the anterior dorsal side, and a cell surface smooth with U-shaped apical groove. Phylogenetic analysis based on LSU rDNA sequences revealed that C. strangulatum and C polykrikoides/C. fulvescens formed two distally related, independent lineages. Based on morphological and phylogenetic analyses, the diagnosis of Cochlodinium is emended and C. miniatum is proposed as synonym of C strangulatum. The new genus Margalefidinium gen. nov., and new combinations for C catenatum, C citron, C flavum, C fulvescens and C polykrikoides are proposed. (C) 2017 Elsevier B.V. All rights reserved.
机译:鞭毛藻(Cochlodinium)的光合物种,如多环梭状芽孢杆菌(C. polykrikoides),最有害的形成花的鞭毛藻之一,已被广泛研究。关于球孢菌属的异养形式,例如其类型种,链霉菌,知之甚少。这是一种罕见的大型(约200微米长),单食和吞噬性物种,具有许多折射体,中心核包裹在不同的核周囊中,细胞表面具有细的纵纹和圆形的顶端沟。 C多角类植物和相关物种的形态不同于普通类型。它是形成花的物种,具有单,二或四细胞链,小细胞大小(2540 [Am长),叶绿体纵向平行排列,前核,前背侧眼点,细胞表面光滑带有U形顶端凹槽。基于LSU rDNA序列的系统发育分析表明,C。strangulatum和C polykrikoides / C。 fulvescens形成了两个远端相关的独立谱系。在形态学和系统发育分析的基础上,对耳蜗念珠菌的诊断进行了改进,并提出了小隐孢子虫作为C. strangulatum的代名词。 Margalefidinium新属。 nov。,并提出了用于悬链碳,柠檬柚子,黄酮,富叶抑菌和多聚核苷的新组合。 (C)2017 Elsevier B.V.保留所有权利。

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