The morphological and phylogenetic characterization for the dinoflagellate Margalefidinium fulvescens (=Cochlodinium fulvescens) isolated from the Jiaozhou Bay, China
文献类型：CNKI期刊论文
| 作者 | HU Zhangxi ; DENG Yunyan; LI Yuhang; TANG Ying Zhong
|
| 发表日期 | 2018-10-15 |
| 出处 | Acta Oceanologica Sinica
 |
| 关键词 | Margalefidinium fulvescens morphology phylogeny pumpkin-like structure Jiaozhou Bay China |
| 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 μm in length, and 19–41 μm 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. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | The National Natural Science Foundation of China under contract No.41506143 ; the NSFC-Shandong Joint Fund for Marine Ecology and Environmental Sciences under contract No.U1606404 ; the National Natural Science Foundation of China under contract Nos 41476142,61533011 and 41776125 ; the Scientific and Technological Innovation Project supported by the Qingdao National Laboratory for Marine Science under contract No.2016ASKJ02 ; the Creative Team Project of the Laboratory for Marine Ecology and Environmental Science,Qingdao National Laboratory for Marine Science and Technology under contract No.LMEESCTSP-2018-1 |
| 卷 | v.37期:10页:17-23 |
| 语种 | 英文; |
| 分类号 | Q949.2 |
| ISSN号 | 0253-505X |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/188767]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.CASKeyLaboratoryofMarineEcologyandEnvironmentalSciences,InstituteofOceanology,ChineseAcademyofSciences 2.LaboratoryforMarineEcologyandEnvironmentalScience,PilotNationalLaboratoryforMarineScienceandTechnology(Qingdao) 3.CenterforOceanMega-Science,ChineseAcademyofSciences 4.DepartmentofMarineOrganismTaxonomyandPhylogeny,InstituteofOceanology,ChineseAcademyofSciences |
| 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. 2018. |
入库方式： OAI收割
来源：海洋研究所
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