A re-investigation of the bloom-forming unarmored dinoflagellate Karenia longicanalis (syn. Karenia umbella) from Chinese coastal waters
文献类型： 外文期刊
作者： Wang Jianyan 1 ; Cen Jingyi 2 ; Li Si 2 ; Lu Songhui 2 ; Moestrup Ojvind 4 ; Chan Kin-Ka 5 ; Jiang Tao 6 ; Lei Xiangdong 7 ;
作者机构： 1.Beijing Museum Nat Hist, Dept Sci Res, Beijing 100050, Peoples R China
2.Jinan Univ, Coll Life Sci & Technol, Guangzhou 510632, Guangdong, Peoples R China
3.Jinan Univ, Key Lab Eutrophicat & Red Tide Prevent, Guangdong Higher Educ Inst, Guangzhou 510632, Guangdong, Peoples R China
4.Univ Copenhagen, Dept Biol, Marine Biol Sect, Univ Pk 4, DK-2100 Copenhagen O, Denmark
5.Open Univ Hong Kong, Sch Sci & Technol, Kowloon, Hong Kong 999077, Peoples R China
6.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Minist Agr, Key Lab Sustainable Dev Marine Fisheries, Qingdao 266071, Peoples R China
7.State Oce
关键词： harmful algal blooms (HABs); phytoplankton; morphology; phylogeny; large subunit (LSU) rRNA; internal transcribed spacer (ITS)
期刊名称：JOURNAL OF OCEANOLOGY AND LIMNOLOGY （ 影响因子：1.265； 五年影响因子：1.276 ）
ISSN： 2096-5508
年卷期： 2018 年 36 卷 6 期
页码：
收录情况： SCI
摘要： The dinoflagellate genus Karenia is known for recurrent harmful blooms worldwide. However, species diversity of the genus is generally overlooked owing to the difficulty of identifying small unarmored dinoflagellates. We have established four clonal cultures of Karenia longicanalis isolated from the type locality, Hong Kong harbor (strain HK01) and other three locations along the Chinese coasts (strains YB01, DT01, and NJ01). The morphology of the strain was studied by light and scanning electron microscopy (LM and SEM) and the pigment composition analyzed by high-performance liquid chromatography. We provide the first molecular data of K. longicanalis based on the large subunit (LSU) rRNA gene sequence and internal transcribed spacer (ITS). The four strains showed identical LSU rDNA sequences with a similarity of 99.4% to the holotype of Karenia umbella (strain KUTN05) from Australia. In the ITS phylogeny, the sequence of K. umbella branched between the Chinese strains of K. longicanalis. A careful comparison of the morphology of K. longicanalis and K. umbella reveals the similarity in the diagnostic characters. Differences may appear due to the sample treatment for SEM. We conclude that K. umbella is a junior synonym of K. longicanalis.
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