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海洋浮游古菌MGII的研究进展
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国家自然科学基金(41906136,41530105,91851210);广东省自然科学基金(2018B030311016);科技部国家重点研发计划全球变化及应对专项(2018YFA0605800);南方科技大学深圳海洋地球古菌组学重点实验室项目(ZDSYS201802081843490)


Advances in marine group II archaea research
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    摘要:

    海洋浮游古菌MGII是海洋表层水体中最丰富的古菌类群。自1992年被发现以来,如今依然没有被成功分离纯化。前人基于16S rRNA基因的研究认为MGII可以被分为MGIIa、MGIIb和MGIIc三个亚类。近年来,对大量的宏基因组测序数据的分析表明,MGII在分类学上属于广古菌门热源体纲下的一个目,包含MGIIa和MGIIb两个科。以前通过16S rRNA基因高通量测序结果得出的少量MGIIc,在宏基因组测序的数据中并没有找到,因此最近两年的研究认为MGII主要由MGIIa和MGIIb组成。本文综述了海洋浮游古菌MGII的丰度和多样性分布特征、潜在的生态功能、生态关系以及培养等方面的研究进展,比较了MGIIa和MGIIb的异同点,并对当前的研究热点和趋势进行了讨论和展望。

    Abstract:

    Marine Group II (MGII) is the most abundant archaeal group in surface ocean waters. At present, no pure culture of the group has been isolated successfully since they were discovered in 1992. Analysis of the 16S rRNA genes has revealed that MGII mainly consist of two groups, MGIIa and MGIIb, which perform photoheterotrophy and potentially play an important role in marine carbon cycle. Phylogenetic classification based on the 16S rRNA gene assigned MGIIa and MGIIb as two families within an order-level lineage under Thermoplasmata. The phylogenetic position of a third group, MGIIc, is ambiguous due to the lack of their 16S rRNA gene sequences and absence in the metagenome data. This mini-review aims to provide the latest information on the distribution, abundance and diversity, metabolic capabilities and potential ecological functions, as well as efforts being made in enrichment and isotope labeling studies of MGII. Insights on future research directions are also provided.

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刘浩东,闫荣曼,张传伦. 海洋浮游古菌MGII的研究进展. 微生物学报, 2020, 60(9): 1834-1851

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  • 收稿日期:2020-02-29
  • 最后修改日期:2020-05-19
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  • 在线发布日期: 2020-09-16
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