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| 中国新记录定鞭藻物种冠状棕囊藻的遗传进化分析 |
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宋会银1,2,3,4, 王一奇1,3,4,5, 张梦佳1,3,4,5, 陈楠生1,3,4
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1.中国科学院海洋研究所 海洋生态与环境科学重点实验室 山东青岛 266071;2.江汉大学生命科学学院 湖北武汉 430056;3.青岛海洋科学与技术试点国家实验室 海洋生态与环境科学功能实验室 山东青岛 266237;4.中国科学院海洋大科学研究中心 山东青岛 266071;5.中国科学院大学 北京 100049
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| 摘要: |
| 棕囊藻属（Phaeocystis）分类学上位于定鞭藻门（Haptophyta）定鞭藻纲（Haptophyceae）棕囊藻目（Phaeocystales）棕囊藻科（Phaeocystaceae）。迄今在我国海域仅分离鉴定到一种棕囊藻属物种，即自1997年以来在我国海域频繁形成有害藻华的球形棕囊藻（Phaeocystis globosa）。作者从中国南海分离到一个单细胞鞭毛类株系CNS01077，结合形态特征观察及基于18S rDNA序列的系统发育分析，将其鉴定为冠状棕囊藻（Phaeocystis rex）。这是该棕囊藻物种在我国海域的首次报道。该研究构建了该物种的首个叶绿体基因组序列和首个线粒体基因组序列。与球形棕囊藻和南极棕囊藻的细胞器基因组比较分析发现冠状棕囊藻的细胞器基因组发生了显著的结构重排和序列变异。该物种在我国海域的发现及细胞器基因组的构建，将为棕囊藻的生物多样性组成和地理分布研究提供支撑。 |
| 关键词: 棕囊藻 定鞭藻门 系统发育 细胞器基因组 |
| DOI：10.11693/hyhz20220700180 |
| 分类号:Q949.2 |
| 基金项目:国家自然科学基金项目，42176162号；中国科学院战略性先导科技专项（B类），XDB42000000号；中国科学院率先行动“百人计划”；泰山学者特聘专家计划；源头创新计划（人才发展专项-第五批创业创新领军人才研发补助（19-3-2-16-zhc）。 |
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| GENETIC EVOLUTION OF A NEW RECORD OF PHAEOCYSTIS REX IN CHINA |
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SONG Hui-Yin1,2,3,4, WANG Yi-Qi1,3,4,5, ZHANG Meng-Jia1,3,4,5, CHEN Nan-Sheng1,3,4
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1.CAS Key Laboratory of Marine Ecology and Environmental science, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2.School of Life Sciences, Jianghan University, Wuhan 430056;3.Functional Laboratory for Marine Ecology and Environmental science, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China;4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;5.University of Chinese Academy of Sciences, Beijing 100049, China
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| Abstract: |
| The genus Phaeocystis is a member of the Phylum Haptophyta, Class Prymnesiophyceae, Order Phaeocystales, and Family Phaeocystaceae. Phaeocystis globosa, which is a species that frequently causes harmful algal blooms, is the only species in the genus Phaeocystis that has been isolated and characterized in coastal waters in China. The strain CNS01077, which was isolated from the South China Sea, was identified as Phaeocystis rex, according to morphological characterization and 18S rDNA-based phylogenetic analysis. This is the first record of the species P. rex in China. We assembled and analyzed the chloroplast genome (cpDNA) and the mitochondrial genome (mtDNA) of P. rex for the first time in this study. Comparative analysis showed that the cpDNA and the mtDNA of P. rex are substantially rearranged compared to those of P. globosa and P. antarctica. The isolation and characterization of Phaeocystis species in China provide a support to studies on biological and geographical distribution of genus Phaeocystis. |
| Key words: Phaeocystis haptophyte phylogeny organelle genome |