气候变化领域集成服务门户(CCPortal): The cyanobacterium Prochlorococcus has divergent light-harvesting antennae and may have evolved in a low-oxygen ocean

CCPortal

DOI	10.1073/PNAS.2025638118
	The cyanobacterium Prochlorococcus has divergent light-harvesting antennae and may have evolved in a low-oxygen ocean
	Ulloa O.; Henríquez-Castillo C.; Ramírez-Flandes S.; Plominsky A.M.; Murillo A.A.; Morgan-Lang C.; Hallam S.J.; Stepanauskas R.
发表日期	2021
ISSN	00278424
卷号	118 期号:11
英文摘要	Marine picocyanobacteria of the genus Prochlorococcus are the most abundant photosynthetic organisms in the modern ocean, where they exert a profound influence on elemental cycling and energy flow. The use of transmembrane chlorophyll complexes instead of phycobilisomes as light-harvesting antennae is considered a defining attribute of Prochlorococcus. Its ecology and evolution are understood in terms of light, temperature, and nutrients. Here, we report single-cell genomic information on previously uncharacterized phylogenetic lineages of this genus from nutrient-rich anoxic waters of the eastern tropical North and South Pacific Ocean. The most basal lineages exhibit optical and genotypic properties of phycobilisome-containing cyanobacteria, indicating that the characteristic light-harvesting antenna of the group is not an ancestral attribute. Additionally, we found that all the indigenous lineages analyzed encode genes for pigment biosynthesis under oxygen-limited conditions, a trait shared with other freshwater and coastal marine cyanobacteria. Our findings thus suggest that Prochlorococcus diverged from other cyanobacteria under low-oxygen conditions before transitioning from phycobilisomes to transmembrane chlorophyll complexes and may have contributed to the oxidation of the ancient ocean. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Anoxia; Cyanobacteria; Genomics; Microbiology; Oceanography
语种	英语
scopus关键词	oxygen; pigment; anoxia; antenna (organ); Article; evolution; gene expression; genotype; light harvesting system; nonhuman; oceanography; oxidation; Pacific Ocean; phycobilisome; phylogeny; priority journal; Prochlorococcus; sea
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/181184
作者单位	Departamento de Oceanografía, Universidad de Concepción, Concepción, 4070386, Chile; Instituto Milenio de Oceanografía, Concepción, 4070386, Chile; Department of Microbiology and Immunology, University of British Columbia, Vancouver, BC V6T 1Z1, Canada; Graduate Program in Bioinformatics, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Genome Science and Technology Program, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada; ECOSCOPE Training Program, University of British Columbia, Vancouver, BC V6T 1Z3, Canada; Bigelow Laboratory for Ocean Sciences, East Boothbay, ME 04544-0380, United States; Laboratorio de Fisiología y Genética Marina, Centro de Estudios Avanzados en Zonas Áridas, La Serena, 1781421, Chile; Marine Biology Research Division, Scripps Institution of Oceanography, University of California, San Diego, CA 92093-0202, United States; Centro de Estudios de Algas Nocivas, Ins...
推荐引用方式 GB/T 7714	Ulloa O.,Henríquez-Castillo C.,Ramírez-Flandes S.,et al. The cyanobacterium Prochlorococcus has divergent light-harvesting antennae and may have evolved in a low-oxygen ocean[J],2021,118(11).
APA	Ulloa O..,Henríquez-Castillo C..,Ramírez-Flandes S..,Plominsky A.M..,Murillo A.A..,...&Stepanauskas R..(2021).The cyanobacterium Prochlorococcus has divergent light-harvesting antennae and may have evolved in a low-oxygen ocean.Proceedings of the National Academy of Sciences of the United States of America,118(11).
MLA	Ulloa O.,et al."The cyanobacterium Prochlorococcus has divergent light-harvesting antennae and may have evolved in a low-oxygen ocean".Proceedings of the National Academy of Sciences of the United States of America 118.11(2021).