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首页> 外文期刊>Marine ecology >Pyrosequencing reveals specific associations of bacterial clades Roseobacter and Flavobacterium with the harmful dinoflagellate Cochlodinium polykrikoides growing in culture
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Pyrosequencing reveals specific associations of bacterial clades Roseobacter and Flavobacterium with the harmful dinoflagellate Cochlodinium polykrikoides growing in culture

机译：焦磷酸测序揭示细菌进化枝玫瑰支杆菌和黄杆菌与培养物中生长的有害鞭毛鞭毛多球菌的特定关联

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摘要

Harmful algal blooms of the dinoflagellate Cochlodinium polykrikoides are of worldwide environmental concern. Previous field studies have demonstrated the association of such algal blooms with free-living bacteria (FLB) and particle-associated bacteria (PAB). In the present study, we report evidence for bacterial association with C.polykrikoides in laboratory culture. Sampling was performed at different growth stages (lag, exponential and stationary) and pyrosequencing was used to identify taxa. As a result, the community structures of FLB and PAB were elucidated and significant differences between FLB and PAB were identified by hierarchical cluster analysis and the similarity profiles test (p=.05). The relative abundances of bacterial operational taxonomic units distinctly changed in response to the different phases of C.polykrikoides growth. The Roseobacter genus Marivita and the Flavobacterium genus Winogradskyella were dominant in the FLB and PAB associated with C.polykrikoides, respectively. The Roseobacter clade, which has also exhibited associations with C.polykrikoides blooms in field samples, may influence host cell growth through the provision of vitamins.
机译：鞭毛鞭毛藻的有害藻华是全世界关注的环境。先前的田间研究已经证明了此类藻华与自由生活细菌（FLB）和颗粒相关细菌（PAB）的关联。在本研究中，我们报告了在实验室培养中细菌与C.polykrikoides关联的证据。在不同的生长阶段（滞后，指数和固定）进行采样，并使用焦磷酸测序来鉴定分类群。结果，阐明了FLB和PAB的群落结构，并通过层次聚类分析和相似性分布检验（p = .05）识别了FLB和PAB之间的显着差异。细菌操作分类单位的相对丰度明显不同，以响应多形衣藻生长的不同阶段。玫瑰杆菌属Marivita和黄杆菌属Winogradskyella在与多角衣原体相关的FLB和PAB中分别占优势。在野外样品中，玫瑰杆菌属也表现出与多核衣藻的开花有关，可能通过提供维生素影响宿主细胞的生长。

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