Morphology and molecular phylogeny of Gonyaulax kunsanensis sp. nov. (Gonyaulacales, Dinophyceae) from Korean coastal waters

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-06-20 DOI:10.1515/bot-2023-0106

Hyeon Ho Shin, Zhun Li, Kenneth Neil Mertens, Yeong Du Yoo, Joo Yeon Youn, Minji Lee, Haifeng Gu

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Abstract

Two Gonyaulax-like strains were established by isolating cells from Korean coastal waters, and their morphologies and molecular phylogenies based on SSU and LSU rRNA gene sequences were examined. The motile cells displayed neutral torsion and a plate formula typical for the genus Gonyaulax, and were characterized by a reticulated surface with many pores, and a marked antapical flange on the boundary between 1″″ and 2p or two prominent spines. The reticulate ornamentation was sometimes absent on the plate margin or on the entire plate. Pronounced rows of pores on the margins of precingular, cingular and postcingular plates were observed, and especially a distinct pore was always present on the margin of the anterior sulcal plate contacting with 1″. A spiniferate resting cyst had a red body, gonal and intergonal processes, and an antapical flange. In the phylogenetic tree, the Korean isolates had a close relationship to Gonyaulax membranacea and were clearly divergent from other Gonyaulax species. These species can be distinguished by the presence or absence of a distinct pore on the margin of the anterior sulcal plate in touch with 1″, and different process types in cyst morphology. Based on these morpho-molecular data, Gonyaulax kunsanensis sp. nov. is proposed.

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韩国沿海水域 Gonyaulax kunsanensis sp.

通过从韩国沿海水域分离细胞建立了两株 Gonyaulax 样株，并研究了它们的形态以及基于 SSU 和 LSU rRNA 基因序列的分子系统进化。运动细胞显示出中性扭转和典型的 Gonyaulax 属板式，其特征是表面呈网状，有许多孔隙，在 1″″ 和 2p 之间的边界上有明显的反尖凸缘或两个突出的刺。板缘或整个板面有时没有网状装饰。在前星状板、星状板和后星状板的边缘观察到一排明显的孔，特别是在与 1″接触的前沟状板边缘总是有一个明显的孔。一个刺状静止囊肿有一个红色的囊体、冠状突起和冠状突起间突起，以及一个顶端凸缘。在系统发生树中，韩国分离物与 Gonyaulax membranacea 关系密切，与其他 Gonyaulax 种类明显不同。这些物种的区别在于前沟板边缘是否有与 1 英寸接触的明显孔隙，以及包囊形态中不同的突起类型。根据这些形态-分子数据，提出了 Gonyaulax kunsanensis sp.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.