First record of a cylindrical Dipterocladia (Ceramiales, Delesseriaceae), D. cylindrica sp. nov., from Korea based on morphological and molecular analyses

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-01-09 DOI:10.1515/bot-2023-0067

Jeong Chan Kang, Mi Yeon Yang, Yeo Kyeong Oh, Myung Sook Kim

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引用次数: 0

Abstract

Abstract We describe a new species, Dipterocladia cylindrica, found in the subtidal zone of the eastern and southern coasts of Korea. This species has cylindrical branches with numerous sub-dichotomously branching monosiphonous determinate branchlets without adventitious filaments, heavy cortication throughout the thallus, and alternating clockwise periaxial cell formation. The external features of the new species are closer to those of the genus Dasya than to those of Dipterocladia, which have flattened thalli with pairwise distichously arranged monosiphonous pseudolateral and polysiphonous determinate laterals. However, based on the combined results of plastid rbcL and mitochondrial COI–5P sequences, the molecular phylogenetic relationships clearly indicate that our specimens belong to the genus Dipterocladia. We also detected more meaningful morphological characters for delineating the genus within the subfamily Dasyoideae by comparing the morphology and phylogeny, but we could not find unique characters for each clade. Further studies based on reproductive morphology and molecular phylogeny for delimiting the generic boundaries are needed.

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基于形态学和分子分析首次记录来自韩国的圆筒状双角藻（角藻纲，Delesseriaceae），D. cylindrica sp.

摘要我们描述了在韩国东部和南部海岸潮下带发现的一个新物种--圆筒状蝶形花属（Dipterocladia cylindrica）。该物种具有圆柱形枝条，枝条上有许多近二歧分枝的单虹吸决定性小枝，无不定生丝，整个菌丝体有严重的皮质化，顺时针方向交替形成轴周细胞。新种的外部特征更接近于 Dasya 属，而不是 Dipterocladia，后者的叶片扁平，具有成对排列的单虹吸假侧枝和多虹吸决定性侧枝。然而，根据质粒 rbcL 和线粒体 COI-5P 序列的综合结果，分子系统进化关系清楚地表明我们的标本属于 Dipterocladia 属。通过比较形态和系统进化关系，我们还发现了更多有意义的形态特征，可用于在 Dasyoideae 亚科中划分该属，但我们无法为每个支系找到独特的特征。我们需要进一步研究基于生殖形态学和分子系统发生学的划分属界的方法。

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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.