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High throughput sequencing of 18S rRNA and its gene to characterize a Prorocentrum shikokuense (Dinophyceae) bloom

文献类型: 外文期刊

作者: Zhang, Yaqun 1 ; Lin, Xin 1 ; Li, Tangcheng 1 ; Li, Hengde 2 ; Lin, Lingxiao 1 ; Luo, Hao 1 ; Li, Ling 1 ; Ji, Nanjing 1 ; L 1 ;

作者机构: 1.Xiamen Univ, Coll Ocean & Earth Sci, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China

2.Chinese Acad Fishery Sci, Key Lab Aquat Genom, Beijing Key Lab Fishery Biotechnol, Minist Agr & Rural Affairs, Beijing 100141, Peoples R China

3.Xiamen Univ, Xiamen Key Lab Urban Sea Ecol Conservat & Restora, Xiamen 361102, Peoples R China

4.Univ Connecticut, Dept Marine Sci, Groton, CT 06405 USA

关键词: rRNA gene; rRNA:rRNA gene ratio; Dinoflagellate bloom; Community diversity; East China Sea, Prorocentrum shikokuense

期刊名称:HARMFUL ALGAE ( 影响因子:4.273; 五年影响因子:5.824 )

ISSN: 1568-9883

年卷期: 2020 年 94 卷

页码:

收录情况: SCI

摘要: Comparing phytoplankton non-bloom and bloom communities using rRNA and its coding gene can help understand the shift of dominant species and its driving processes (e.g., intrinsic growth or grazing). Here we conducted high-throughput sequencing of 18S rRNA and its coding gene for studying non-bloom and bloom plankton communities in East China Sea. The non-bloom community was dominated by diatoms whereas during the bloom it was dominated by the dinoflagellate Prorocentrum shikokuense (formerly P. donghaiense). P. shikokuense rRNA abundance and rRNA:rRNA gene ratio both increased markedly in the bloom, indicating that the bloom arose from active growth. In contrast, some non-bloom species showed low DNA abundances during the bloom albeit high rRNA:rRNA gene ratios, suggesting that cell loss processes such as grazing might have prevented these species from blooming or that these species might be at an early stage of bloom development. Furthermore, Pearson's correlation analysis showed that dinoflagellate abundance was positively correlated with temperature and negatively related to dissolved inorganic phosphate (DIP) concentrations, suggesting warm and DIP-poor environment as a niche space for P. shikokuense. Our results demonstrate the usefulness of combined analysis of rRNA and its gene in characterizing phytoplankton bloom development to shed light on the complex phytoplankton dynamics and regulating mechanisms in the course of bloom development.

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