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首页> 外文期刊>Harmful Algae >Feeding characteristics and molecular phylogeny of the thecate mixotrophic dinoflagellate Fragilidium mexicanum
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Feeding characteristics and molecular phylogeny of the thecate mixotrophic dinoflagellate Fragilidium mexicanum

机译：主题混合营养性鞭毛甲藻草莓的取食特性和分子系统发育

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摘要

Prey spectrum and feeding process of the mixotrophic thecate dinoflagellate Fragilidium mexicanum strain Fm-LOHABE01 were examined using a culture isolated from Masan Bay, Korea in 2011 during a summer bloom of the toxic dinoflagellate Alexandrium pacificum. The novel 18S and 28S rDNA sequences for F. mexicanum were also used to explore inter-species relationships within the genus Fragilidium. The F. mexicanum fed on species belonging to four dinoflagellate genera (i.e., Alexandrium, Ceratium, Heterocapsa, and Scrippsiella) when separately offered a variety of prey, including dinoflagellates, raphidophytes, cryptophytes, and a ciliate. In addition, F. mexicanum displayed different levels of feeding frequency for prey species of Alexandrium. While F. mexicanum consistently fed on A. catenella and A. pacificum, feeding on A. affine was rarely observed. The F. mexicanum ingested prey by direct engulfment through the sulcus, after capturing the prey by a tow filament. Phylogenetic analyses of 18S and 28S rDNA datasets demonstrated that Fragilidium sequences formed a monophyletic group with high statistical supports and diverged into four distinct clades. The F mexicanum formed a separate Glade with Fragilidium sp. EUSK D from Angola and Korean isolate of F. fissile with very strong supports. (C) 2017 Elsevier B.V. All rights reserved.
机译：在2011年夏季有毒的鞭毛鞭毛亚历山大藻的夏季开花期间，使用从韩国马山湾分离出的培养物，检查了混合营养的主题鞭毛鞭毛鞭形藻Fragilidium mexicanum菌株Fm-LOHABE01的猎物光谱和摄食过程。墨西哥镰刀菌的新颖的18S和28S rDNA序列也被用于探索Fragilidium属中的种间关系。饲喂属于四个鞭毛藻属的物种的墨西哥镰刀菌（即亚历山大藻，Ceratium，Heterocapsa和Scrippsiella），当分别提供各种猎物时，包括鞭毛藻，鳞翅目植物，隐孢子虫和纤毛虫。此外，墨西哥镰刀菌对亚历山大种类的猎物表现出不同的摄食频率。尽管墨西哥镰刀菌始终以卡特纳链霉菌和太平洋曲霉为食，但很少观察到以仿射曲霉为食。在用细丝捕获猎物后，墨西哥镰刀通过沟直接吞食猎物。对18S和28S rDNA数据集的系统进化分析表明，Fragilidium序列形成了具有高统计支持的单系统群体，并分为四个不同的进化枝。墨西哥F与Fragilidium sp形成了单独的Glade。来自安哥拉的EUSK D和韩国分离的裂变假丝酵母具有非常强大的支持。 （C）2017 Elsevier B.V.保留所有权利。

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