Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.2025638118 |
The cyanobacterium Prochlorococcus has divergent light-harvesting antennae and may have evolved in a low-oxygen ocean | |
Osvaldo Ulloa; Carlos Henríquez-Castillo; Salvador Ramírez-Flandes; Alvaro M. Plominsky; Alejandro A. Murillo; Connor Morgan-Lang; Steven J. Hallam; Ramunas Stepanauskas | |
2021-03-16 | |
发表期刊 | Proceedings of the National Academy of Sciences
![]() |
出版年 | 2021 |
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. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/318647 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Osvaldo Ulloa,Carlos Henríquez-Castillo,Salvador Ramírez-Flandes,et al. The cyanobacterium Prochlorococcus has divergent light-harvesting antennae and may have evolved in a low-oxygen ocean[J]. Proceedings of the National Academy of Sciences,2021. |
APA | Osvaldo Ulloa.,Carlos Henríquez-Castillo.,Salvador Ramírez-Flandes.,Alvaro M. Plominsky.,Alejandro A. Murillo.,...&Ramunas Stepanauskas.(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. |
MLA | Osvaldo Ulloa,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 (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论