The morphological and phylogenetic characterization for the dinoflagellate Margalefidinium fulvescens (=Cochlodinium fulvescens) isolated from the Jiaozhou Bay, China

doi:10.1007/s13131-018-1295-0

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	The morphological and phylogenetic characterization for the dinoflagellate Margalefidinium fulvescens (=Cochlodinium fulvescens) isolated from the Jiaozhou Bay, China
	Hu Zhangxi1,2 ; Deng Yunyan 1,2; Li Yuhang 3; Tang Ying Zhong 1,2
刊名	ACTA OCEANOLOGICA SINICA
	2018-10-01
卷号	37 期号:10 页码:11-17
关键词	Margalefidinium fulvescens morphology phylogeny pumpkin-like structure Jiaozhou Bay China
ISSN号	0253-505X
DOI	10.1007/s13131-018-1295-0
文献子类	Article
英文摘要	The dinoflagellate genus Margalefidinium has been split from Cochlodinium as a new genus recently and Margalefidinium fulvescens is one of the five Margalefidinium species. Margalefidinium fulvescens is toxic and has been reported from the coastal waters of USA, Canada, Mexico, China, Japan, Indonesia, Korea, Pakistan and Spain. Here we provide the morphological and phylogenetic characterization for an isolate of it from the Jiaozhou Bay, Qingdao, China. Our results showed that the vegetative cells were subspherical to ellipsoidal, 34-60 m in length, and 19-41 m in width. Both single cell forms and colonies in chains of 2, 4, or 8 cells were observed in cultures, but chain forms with 2 or 4 cells were observed more often in the field samples. The cingulum was rather deep, encircling the cell approximately twice, but the sulcus was rather narrow, surrounding the cell about one turn. The nucleus was spherical and located at the central epicone. The chloroplasts were granular, brownish, and scattered peripherally. An orange pigmented body also appeared in the epicone. The apical groove appeared vase-like as previously described. Under epi-fluorescence microscopy, a pumpkin-like structure was clearly observed, in which cells were embedded. Cells were observed to exit from the structure, which led us to a hypothesis that the structure may provide cells a shelter to avoid predation or to respond to other stresses. The phylogenetic analyses based on partial LSU rDNA sequences indicated that M. fulvescens from the Jiaozhou Bay was grouped with M. fulvescens populations from other origins and closely related to the clade of M. polykrikoides. Our morphological observations and phylogenetic analyses together confirmed the presence of M. fulvescens in China and our monitoring has also observed the species dominant in the dinoflagellate community of the Jiaozhou Bay in the early autumn of 2015, which alerted us to continually monitor this bloom-forming species in the region.
学科主题	Oceanography
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000450463200003
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/157527]
专题	海洋研究所_海洋生态与环境科学重点实验室
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Ecol & Environm Sci, Qingdao 266237, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Dept Marine Organism Taxon & Phylogeny, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Hu Zhangxi,Deng Yunyan,Li Yuhang,et al. The morphological and phylogenetic characterization for the dinoflagellate Margalefidinium fulvescens (=Cochlodinium fulvescens) isolated from the Jiaozhou Bay, China[J]. ACTA OCEANOLOGICA SINICA,2018,37(10):11-17.
APA	Hu Zhangxi,Deng Yunyan,Li Yuhang,&Tang Ying Zhong.(2018).The morphological and phylogenetic characterization for the dinoflagellate Margalefidinium fulvescens (=Cochlodinium fulvescens) isolated from the Jiaozhou Bay, China.ACTA OCEANOLOGICA SINICA,37(10),11-17.
MLA	Hu Zhangxi,et al."The morphological and phylogenetic characterization for the dinoflagellate Margalefidinium fulvescens (=Cochlodinium fulvescens) isolated from the Jiaozhou Bay, China".ACTA OCEANOLOGICA SINICA 37.10(2018):11-17.