我国西沙群岛仙掌藻属Halimeda(绿藻门钙扇藻科)的分类学研究  

Taxonomical study on genus Halimeda(Chlorophyta,Udoteaceae)from Xisha Islands,China

作　　者：丁兰平[1,2] 王雨昕 刘金梅 鲍时翔[3] 黄冰心[1,2] DING Lanping;WANG Yuxin;LIU Jinmei;BAO Shixiang;HUANG Bingxin(Collage of Life Sciences,Tianjin Normal University,Tianjin 300387,China;Tianjin Key Laboratory of Animal and Plant Resistance Tianjin Normal University,Tianjin 300387,China;Institute of Tropical Biotechnology,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101,China)

机构地区：[1]天津师范大学生命科学学院,天津300387 [2]天津师范大学天津市动植物抗性重点实验室,天津300387 [3]中国热带农业科学院热带生物技术研究所,海口571101

出　　处：《天津师范大学学报（自然科学版）》2024年第3期28-36,共9页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家自然科学基金面上资助项目(31970216,32270219)。

摘　　要：为了探究仙掌藻属(Halimeda)在我国的分布及其分类,利用形态学、解剖学以及分子系统发育学方法,对2019年6月采集于西沙群岛的仙掌藻属样品进行形态学观察和分子系统发育分析.基于形态特征和rbcL基因序列的系统发育分析结果,共鉴定出了4个物种,即大叶仙掌藻(Halimeda macroloba)、仙掌藻(H. opuntia)、厚节仙掌藻(H. incrassata)和裂圆仙掌藻(新拟名)(H. monile).其中,H. monile为我国新纪录种,其主要特征为藻体节片分枝三裂,节片呈圆柱状,外层囊胞脱钙后不分离.在此基础上,分析仙掌藻属的属内组级系统以及属内其他相关物种间的关系,基于rbcL序列的分析结果显示,仙掌藻属物种(几乎涵盖了该属内的所有物种)形成了5个具有较好支持率的进化支.In order to explore the distribution and taxonomy of Halimeda in China,based on the morphological,anatomical and molecular phylogenetic methods,the morphological observation and molecular phylogenetic analysis were carried out on the samples of the genus Halimeda collected from Xisha Islands,China in June 2019.The result showed that four species were identified,i.e.Halimeda macroloba,H.opuntia,H.incrassata and H.monile.H.monile was the first recorded in China.Its main characteristics included trilobate branches,cylindrical segments and unseparated outer cortical utricles after decalcifica-tion.In the meantime,the intragenus section level and relationship with other related species in this genus were discussed.Based on the rbcL sequence analysis,the species of Halimeda formed five evolutionary branches with good support rate,which induded almost lthe species in the genus.

关 键 词：仙掌藻属 Halimeda monile RBCL 分类学 形态 西沙群岛 

分 类 号：Q949[生物学—植物学]