Gonyaulax geomunensis sp. nov. and two allied species (Gonyaulacales, Dinophyceae) from Korean coastal waters and East China Sea: morphology, phylogeny and growth response to changes in temperature and salinity

IF 1.5 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY
Hyun Jung Kim, Zhun Li, H. Gu, K. Mertens, Joo Yeon Youn, Kyeong Yoon Kwak, S. Oh, K. Shin, Y. Yoo, Wonchoel Lee, H. Shin
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引用次数: 0

Abstract

ABSTRACT Six strains of three different Gonyaulax species were established by isolating cells from the Korean coastal area and the East China Sea, and their morphologies and molecular phylogenies based on SSU and LSU rRNA gene sequences were examined. In addition, the growth responses of the Gonyaulax species to changes in temperature and salinity were investigated. Based on morphological features and phylogenetic positions, Gonyaulax whaseongensis and G. polygramma were identified, and G. geomunensis sp. nov. is proposed in this study. These species displayed the plate formula typical for Gonyaulax, but G. polygramma and G. geomunensis sometimes showed a small intercalary plate (1a) surrounded by plates 2’, *3’ and 3’’. G. geomunensis was morphologically characterized by an S-type ventral organization, descending with a displacement of one cingulum width and bearing one, two or three prominent antapical spines of similar size. The cell surface, which was distinct from other Gonyaulax species, was thick and heavily reticulated into numerous polygonal areas. The reticulation was deeply excavated. The phylogenetics revealed that G. geomunensis and G. whaseongensis belong to different clades, and that there are two ribotypes of G. polygramma, which were morphologically indistinguishable. These species had a close phylogenetic relationship to G. hyalina, and all of them were characterized by dextral torsion. G. whaseongensis, G. polygramma and G. geomunensis had different growth responses to changes of temperature and salinity, respectively, indicating that morphological and phylogenetic identification of Gonyaulax species can be supported by ecological niches.
朝鲜近海和东海的Gonyaulax geomunensis sp.nov.和两个亲缘物种(Gonyaulacales,Dinophyceae):形态、系统发育和生长对温度和盐度变化的响应
摘要通过分离韩国沿海和东海3个不同Gonyaulax物种的细胞,建立了6株Gonyaulax菌株,并基于SSU和LSU rRNA基因序列对其形态和分子系统发育进行了分析。此外,还研究了Gonyaulax物种对温度和盐度变化的生长响应。根据形态特征和系统发育位置,鉴定了Gonyaulax whaseongensis和G. polygramma,并提出了G. geomunensis sp. 11 .。这些物种显示出Gonyaulax的典型板型,但G. polygramma和G. geomunensis有时显示一个由2 ',*3 '和3 "板包围的小板间板(1a)。在形态学上,滇桂树具有s型腹侧组织的特征,以一个带带宽度的位移下降,并具有一个,两个或三个类似大小的突出的顶尖刺。与其他Gonyaulax物种不同的是,它的细胞表面很厚,呈网状,形成许多多边形区域。网状物被深深地挖掘出来了。系统发育结果表明,北棘棘猴和华森棘猴属于不同的进化支,多棘棘猴有两种核型,在形态上难以区分。这些种与G. hyalina有密切的亲缘关系,均以右旋扭转为特征。G. whasongensis、G. polygramma和G. geomunensis分别对温度和盐度变化表现出不同的生长响应,表明Gonyaulax物种的形态和系统发育鉴定可以通过生态位支持。
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来源期刊
Phycologia
Phycologia 生物-海洋与淡水生物学
CiteScore
3.10
自引率
18.80%
发文量
54
审稿时长
3 months
期刊介绍: Phycologia is published bimonthly by the International Phycological Society and serves as a publishing medium for information about any aspect of phycology. Membership in the Society is not necessary for publication. Submitted manuscripts cannot be previously published or submitted elsewhere. Copyright ownership of all accepted papers is held by the International Phycological Society.
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