SAR11 bacteria linked to ocean anoxia and nitrogen loss

Tsementzi Despina; Wu Jieying; Deutsch Samuel; Nath Sangeeta; Rodriguez-R Luis M.; Burns Andrew S.; Ranjan Piyush; Sarode Neha; Malmstrom Rex R.; Padilla Cory C.; Stone Benjamin K.; Bristow Laura A.; Larsen Morten; Glass Jennifer B.; Thamdrup Bo; Woyke Tanja; Konstantinidis Konstantinos T.; Stewart Frank J.

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SAR11 bacteria linked to ocean anoxia and nitrogen loss

机译：SAR11细菌与海洋缺氧和氮损失有关

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Bacteria of the SAR11 clade constitute up to one half of all microbial cells in the oxygen-rich surface ocean. SAR11 bacteria are also abundant in oxygen minimum zones (OMZs), where oxygen falls below detection and anaerobic microbes have vital roles in converting bioavailable nitrogen to N-2 gas. Anaerobic metabolism has not yet been observed in SAR11, and it remains unknown how these bacteria contribute to OMZ biogeochemical cycling. Here, genomic analysis of single cells from the world's largest OMZ revealed previously uncharacterized SAR11 lineages with adaptations for life without oxygen, including genes for respiratory nitrate reductases (Nar). SAR11 nar genes were experimentally verified to encode proteins catalysing the nitrite-producing first step of denitrification and constituted similar to 40% of OMZ nar transcripts, with transcription peaking in the anoxic zone of maximum nitrate reduction activity. These results link SAR11 to pathways of ocean nitrogen loss, redefining the ecological niche of Earth's most abundant organismal group.

机译：SAR11进化枝中的细菌最多占富氧表面海洋中所有微生物细胞的一半。 SAR11细菌在最低氧区域（OMZ）中也很丰富，在该区域中氧降至检测不到的水平，厌氧微生物在将可利用的氮转化为N-2气体方面起着至关重要的作用。尚未在SAR11中观察到厌氧代谢，这些细菌如何促进OMZ生物地球化学循环仍是未知的。在这里，对来自世界上最大的OMZ的单个细胞的基因组分析揭示了以前未表征的SAR11谱系，这些谱系可以适应无氧生命，包括呼吸硝酸盐还原酶（Nar）的基因。 SAR11 nar基因经过实验验证，可以编码催化亚硝酸盐生成反硝化第一步的蛋白质，其结构类似于OMZ nar转录物的40％，转录在最大硝酸盐还原活性的缺氧区域达到峰值。这些结果将SAR11与海洋氮损失的路径联系起来，重新定义了地球上最丰富的生物群的生态位。

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《Nature》 |2016年第7615期|179-183|共5页
作者
Tsementzi Despina; Wu Jieying; Deutsch Samuel; Nath Sangeeta; Rodriguez-R Luis M.; Burns Andrew S.; Ranjan Piyush; Sarode Neha; Malmstrom Rex R.; Padilla Cory C.; Stone Benjamin K.; Bristow Laura A.; Larsen Morten; Glass Jennifer B.; Thamdrup Bo; Woyke Tanja; Konstantinidis Konstantinos T.; Stewart Frank J.;
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作者单位

Georgia Inst Technol, Sch Civil & Environm Engn, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

Georgia Inst Technol, Sch Biol Sci, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

Dept Energy Joint Genome Inst, 2800 Mitchell Dr, Walnut Creek, CA 94598 USA;

Dept Energy Joint Genome Inst, 2800 Mitchell Dr, Walnut Creek, CA 94598 USA;

Georgia Inst Technol, Sch Biol Sci, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

Georgia Inst Technol, Sch Biol Sci, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

Georgia Inst Technol, Sch Biol Sci, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

Georgia Inst Technol, Sch Biol Sci, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

Dept Energy Joint Genome Inst, 2800 Mitchell Dr, Walnut Creek, CA 94598 USA;

Georgia Inst Technol, Sch Biol Sci, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

Bowdoin Coll, Dept Biol, 255 Maine St, Brunswick, ME 04011 USA;

Max Planck Inst Marine Microbiol, Biochem Grp, D-28359 Bremen, Germany;

Univ Southern Denmark, Dept Biol, Campusvej 55, DK-5230 Odense M, Denmark|Univ Southern Denmark, Nord Ctr Earth Evolut NordCEE, Campusvej 55, DK-5230 Odense M, Denmark;

Georgia Inst Technol, Sch Earth & Atmospher Sci, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

Univ Southern Denmark, Dept Biol, Campusvej 55, DK-5230 Odense M, Denmark|Univ Southern Denmark, Nord Ctr Earth Evolut NordCEE, Campusvej 55, DK-5230 Odense M, Denmark;

Dept Energy Joint Genome Inst, 2800 Mitchell Dr, Walnut Creek, CA 94598 USA;

Georgia Inst Technol, Sch Civil & Environm Engn, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA|Georgia Inst Technol, Sch Biol Sci, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

Georgia Inst Technol, Sch Biol Sci, Ford Environm Sci & Technol Bldg,311 Ferst Dr, Atlanta, GA 30332 USA;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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1. SAR11 Bacteria: The Most Abundant Plankton in the Oceans [J] . Stephen J. Giovannoni Annual review of marine science . 2017,第1期

机译：SAR11细菌：海洋中最丰富的浮游生物
2. Resilience of SAR11 bacteria to rapid acidification in the high-latitude open ocean [J] . Hartmann Manuela, Hill Polly G., Tynan Eithne, FEMS Microbiology Ecology . 2016,第2期

机译：SAR11细菌的复原力在高纬度开阔的海洋中快速酸化
3. Biomass Production and Assimilation of Dissolved Organic Matter by SAR11 Bacteria in the Northwest Atlantic Ocean [J] . Rex R. Malmstrom, Matthew T. Cottrell, Hila Elifantz, Applied and Environmental Microbiology . 2005,第6期

机译：SAR11细菌在西北大西洋的生物量生产和溶解有机物的吸收
4. Linking the Nitrogen and One-Carbon Cycles - The Impact of Inorganic Carbon Limitation on Ammonia Oxidation and Nitrogen Oxide Emission Rates in Ammonia Oxidizing Bacteria [C] . W. O. Khunjar, D. Jiang, S. Murthy, WEFTEC 2011;Annual Water Environment Federation technical exhibition and conference . 2011

机译：链接氮和一碳循环-无机碳限制对氨氧化细菌中氨氧化和氮氧化物排放速率的影响
5. Nitrogen biogeochemistry and ancient oceanic anoxia [D] . Junium, Christopher K. 2010

机译：氮生物地球化学与古代海洋缺氧
6. SAR11 bacteria linked to ocean anoxia and nitrogen loss [O] . Despina Tsementzi, Jieying Wu, Samuel Deutsch, -1

机译：SAR11细菌与海洋缺氧和氮损失有关
7. SAR11 bacteria linked to ocean anoxia and nitrogen loss [O] . Tsementzi, Despina, Wu, Jieying, Deutsch, Samuel, 2016

机译：SAR11细菌与海洋缺氧和氮损失有关

SAR11 bacteria linked to ocean anoxia and nitrogen loss

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