Globally Distributed Uncultivated Oceanic N2-Fixing Cyanobacteria Lack Oxygenic Photosystem II

被引：254

作者：

Zehr, Jonathan P. ^{[1
]}

Bench, Shellie R. ^{[1
]}

Carter, Brandon J. ^{[1
]}

Hewson, Ian ^{[1
]}

Niazi, Faheem ^{[2
]}

Shi, Tuo ^{[1
]}

Tripp, H. James ^{[1
]}

Affourtit, Jason P. ^{[2
]}

机构：

[1] Univ Calif Santa Cruz, Ocean Sci Dept, Santa Cruz, CA 95064 USA

[2] Life Sci 454, Branford, CT 06405 USA

来源：

SCIENCE | 2008年 / 322卷 / 5904期

关键词：

D O I：

10.1126/science.1165340

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Biological nitrogen (N2) fixation is important in controlling biological productivity and carbon flux in the oceans. Unicellular N 2-fixing cyanobacteria have only recently been discovered and are widely distributed in tropical and subtropical seas. Metagenomic analysis of flow cytometry - sorted cells shows that unicellular N2-fixing cyanobacteria in "group A" (UCYN-A) lack genes for the oxygen-evolving photosystem II and for carbon fixation, which has implications for oceanic carbon and nitrogen cycling and raises questions regarding the evolution of photosynthesis and N2 fixation on Earth.

引用

页码：1110 / 1112

页数：3

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