生物多样性

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链带藻属系统发育研究及其中国物种名录修订

王清华1,2, 李芳1, 刘美3, 任佳瑶1, 刘国祥4, 谢树莲3, 胡征宇3,4, 刘旭东3*   

  1. 1.太原师范学院生物科学与技术学院, 山西晋中 030619; 2.太原师范学院汾河流域地表过程与资源生态安全山西省重点实验室, 山西晋中 030619; 3.山西大学生命科学学院特色植物资源研究与利用山西省重点实验室, 太原 030031; 4.中国科学院水生生物研究所藻类生物学重点实验室, 武汉 430072
  • 收稿日期:2026-07-02 修回日期:2026-08-26 接受日期:2026-09-11
  • 通讯作者: 刘旭东

Phylogenetic study of the genus Desmodesmus and revision of its species checklist in China

Qinghua Wang1,2, Fang Li1,2, Mei Liu3, Guoxiang Liu4, Shulian Xie3, Zhengyu Hu3,4, Xudong Liu3*   

  1. 1 College of Biological Sciences and Technology, Taiyuan Normal University, Jinzhong, Shanxi 030619, China 

    2 Shanxi Key Laboratory of Earth Surface Processes and Resource Ecology Security in Fenhe River Basin, Taiyuan Normal University, Jinzhong, Shanxi 030619, China 

    3 School of Life Science, Shanxi Key Laboratory for Research and Development of Regional Plants, Shanxi University, Taiyuan 030031, China 

    4 Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China

  • Received:2026-07-02 Revised:2026-08-26 Accepted:2026-09-11
  • Contact: Xudong Liu

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摘要： 链带藻属（Desmodesmus）是淡水生态系统中最为常见的小型绿藻类群之一，在水环境监测与生态评价中具有重要指示意义。同时，该属成员易于培养、高附加值产物多，在生物能源、食品、饲料、医药、环保等领域具有广泛的应用价值。然而，该属类群间基础的系统发育关系仍不明确，我国的分类系统也亟待修订。本研究基于中国不同地理区域采集的链带藻属样本，整合形态学观察及分子标记扩增等方法，对该属的系统发育关系进行研究。在此基础上，结合历史记录和参照最新分类学研究进展，对我国链带藻属的物种多样性进行了修订。结果表明：（1）目前中国记录的链带藻属经分类学修订的物种共41种4变种，其中包含8个中国新记录种，另有26种8变种和变型形态符合链带藻属特征，但尚未正式修订，目前分类地位仍位于栅藻属（Scenedesmus）中。（2）新增该类群ITS1及tufA分子标记，并基于此构建了该属新的系统发育树，首次识别该属9个演化分支，并揭示每个分支的核心形态类型。本研究系统梳理了我国链带藻属的物种多样性及系统发育关系，为相关水体生物多样性监测与水生态健康评价提供了基础的分类学参照，也为该属在资源开发与产业化利用方面奠定了分类学基础。

关键词: 链带藻属, 系统发育, 分子系统学, 淡水藻类

Abstract

Aim: The genus Desmodesmus is one of the most common green microalgae in freshwater ecosystems and serves as an important indicator of water quality monitoring and ecological assessment. Meanwhile, species of this genus are easily cultured and synthesize a variety of high-value metabolites, endowing them with broad application potential in bioenergy, food, feed, pharmaceuticals, and environmental remediation. However, the phylogenetic relationships among infrageneric groups remain poorly elucidated, and the taxonomic system of this genus in China is in urgent need of systematic revision. 

Methods: This study collected Desmodesmus samples from diverse regions across China, and integrated morphological observations with molecular marker amplification to reconstruct the phylogeny of the genus. At the same time, combining historical records and the latest advances in taxonomic research, a comprehensive revision of the species diversity of the genus Desmodesmus in China was conducted. 

Results: (1) Currently, 41 species and 4 varieties of the genus Desmodesmus recorded in China have been revised based on molecular data. Additionally, 26 species and 8 varieties and forms, although morphologically consistent with the characteristics of Desmodesmus, have not yet undergone revision and remain taxonomically classified within Scenedesmus. (2) The ITS1 and tufA markers were newly applied to reconstruct the phylogeny of the genus, identifying nine stable evolutionary clades for the first time and revealing the core morphotype of each clade. 

Conclusion: This study systematically clarified the species diversity and phylogenetic relationships of Desmodesmus in China, providing a fundamental taxonomic reference for aquatic biodiversity monitoring and ecosystem health assessment. It also established a taxonomic foundation for the resource development and industrial utilization of this genus.

Key words: Desmodesmus, phylogeny, molecular systematics, freshwater algae

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