气候变化领域集成服务门户(CCPortal): Marine Synechococcus picocyanobacteria: Light utilization across latitudes

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DOI	10.1073/pnas.2111300118
	Marine Synechococcus picocyanobacteria: Light utilization across latitudes
	Six C.; Ratin M.; Marie D.; Corre E.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:38
英文摘要	The most ubiquitous cyanobacteria, Synechococcus, have colonized different marine thermal niches through the evolutionary specialization of lineages adapted to different ranges of temperature seawater. We used the strains of Synechococcus temperature ecotypes to study how light utilization has evolved in the function of temperature. The tropical Synechococcus (clade II) was unable to grow under 16 °C but, at temperatures >25 °C, induced very high growth rates that relied on a strong synthesis of the components of the photosynthetic machinery, leading to a large increase in photosystem cross-section and electron flux. By contrast, the Synechococcus adapted to subpolar habitats (clade I) grew more slowly but was able to cope with temperatures <10 °C. We show that growth at such temperatures was accompanied by a large increase of the photoprotection capacities using the orange carotenoid protein (OCP). Metagenomic analyzes revealed that Synechococcus natural communities show the highest prevalence of the ocp genes in low-temperature niches, whereas most tropical clade II Synechococcus have lost the gene. Moreover, bioinformatic analyzes suggested that the OCP variants of the two cold-adapted Synechococcus clades I and IV have undergone evolutionary convergence through the adaptation of the molecular flexibility. Our study points to an important role of temperature in the evolution of the OCP. We, furthermore, discuss the implications of the different metabolic cost of these physiological strategies on the competitiveness of Synechococcus in a warming ocean. This study can help improve the current hypotheses and models aimed at predicting the changes in ocean carbon fluxes in response to global warming. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Cyanobacteria; Orange carotenoid protein; Photosynthesis; Synechococcus; Temperature
语种	英语
scopus关键词	carbon; carotenoid; Article; bacterial gene; bacterial growth; bioinformatics; cold; controlled study; convergent evolution; electron transport; genetic variability; greenhouse effect; latitude; marine bacterium; metagenomics; molecular dynamics; nonhuman; ocp gene; photosynthesis; prevalence; sea; species habitat; Synechococcus; temperature sensitivity
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238381
作者单位	Centre National de la Recherche Scientifique, Sorbonne Université, UMR 7144, Adaptation et Diversité en Milieu Marin, Group Ecology of Marine Plankton, Station Biologique de Roscoff, Roscoff, 29680, France; Department Analysis and Bioinformatics for Marine Science, Fédération de Recherche 2424, Roscoff, 29680, France
推荐引用方式 GB/T 7714	Six C.,Ratin M.,Marie D.,et al. Marine Synechococcus picocyanobacteria: Light utilization across latitudes[J],2021,118(38).
APA	Six C.,Ratin M.,Marie D.,&Corre E..(2021).Marine Synechococcus picocyanobacteria: Light utilization across latitudes.Proceedings of the National Academy of Sciences of the United States of America,118(38).
MLA	Six C.,et al."Marine Synechococcus picocyanobacteria: Light utilization across latitudes".Proceedings of the National Academy of Sciences of the United States of America 118.38(2021).