在冷水珊瑚中揭开微生物组 (Symbiodiniaceae和细菌) 的秘密
Sanqiang Gong1,2, Jiayuan Liang2, Xujie Jin1
1Key Laboratory of Tropical Marine Bio-resources and Ecology & Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences , Guangzhou, China.
Microbiology spectrum
|September 20, 2023
概括
这项研究表明,冷水珊瑚是各种细菌和Symbiodiniaceae的宿主,细菌积极固定碳并循环/硫. 这些微生物功能对于冷水珊瑚在深海环境中的生存至关重要.
科学领域:
- 海洋生物学 海洋生物学
- 微生物生态学 微生物生态学
- 深海科学 深海科学
背景情况:
- 冷水珊瑚 (CWC) 在深海中普遍存在,但它们的微生物关联在分子层面上尚不清楚.
- 研究CWC的微生物组对于了解它们的生态角色和生存策略至关重要.
研究的目的:
- 在分子水平上研究冷水珊瑚物种的微生物群 (Symbiodiniaceae和细菌).
- 为了比较冷水珊瑚和温水珊瑚之间的微生物群落及其功能.
主要方法:
- 使用了元编码 (16S rRNA基因测序) 和元转录组学.
- 观察到组织截面可以定位微生物共生体.
- 冷水珊瑚物种 (Narella versluysi,Heterogorgia uatumani,Muriceides sp.) 在这些珊瑚物种中 与温水珊瑚对照一起进行了分析.
主要成果:
- 冷水珊瑚是各种细菌和Symbiodiniaceae的宿主,后者在内皮中发现.
- 在CWC中丰富的细菌类包括Actinobacteria和Proteobacteria;新的候选类被确定.
- 交生菌表现出低光合作用基因转录,而细菌表现出高转录非光合作用碳固定 (伍德-利容达尔通路),SCFA生产和/硫循环.
结论:
- 交生菌可以在CWC中生存并积极转录基因,这表明它具有共生或寄生作用.
- 在CWC中的细菌拥有完整的非光合作用二氧化碳固定通路,对碳,和硫循环至关重要.
- 这些细菌功能可能对冷水珊瑚在深海环境中的生存至关重要.
相关概念视频
Bacterial Flora of the Large Intestine
508
The gut microbiome is formed by a vast and diverse community of bacteria that colonizes our large intestine. These bacteria start residing in the gut from birth and continue diversifying throughout life, influenced by factors such as diet, lifestyle, and stress. The gut bacterial community also includes bacteria from food and those that enter the colon through the anus.
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
508
Other Unique Bacteria
35
Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
35
Bacterial Phylum Verrucomicrobiota
35
The phylum Verrucomicrobiota comprises at least four characterized orders, with most species classified within the order Verrucomicrobiotales. Members of this phylum are either aerobic or facultatively aerobic, with the ability to ferment sugars. A notable exception is the genus Methylacidiphilum, which consists of aerobic methanotrophs. Additionally, some Verrucomicrobiota establish symbiotic relationships with protists. These bacteria are widely distributed across various environments,...
35
Bacterial Phylum Firmicutes
42
Firmicutes is a diverse phylum of Gram-positive bacteria characterized by a low GC content in their genomes. This phylum includes organisms with monoderm or diderm cell envelopes, highlighting a complex evolutionary history. Firmicutes comprises several major orders, including Lactobacillales, Clostridiales, and Bacillales, which exhibit remarkable diversity in their morphology, metabolism, and ecological roles.The order Lactobacillales includes lactic acid bacteria, which are fermentative...
42
Diversity of Protists III
47
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
47
Bacterial Phylum Planctomycetes
31
Planctomycetes are a group of morphologically distinct bacteria predominantly classified into two orders: Planctomycetales and Brocadiales. These gram-negative bacteria exhibit unique features, including division by budding and the presence of stalks or appendages. Their cells are often found in rosette arrangements, and they are notable for possessing an S-layer in their cell envelope, which is relatively uncommon among bacteria. Additionally, Planctomycetes frequently exhibit intracellular...
31


