Comparative genomics reveals insights into cyanobacterial evolution and habitat adaptation

Chen, Meng-Yun1; Teng, Wen-Kai2; Zhao, Liang1; Hu, Chun-Xiang3; Zhou, Yang-Kai4,5; Han, Bo-Ping6,7; Song, Li-Rong3; Shu, Wen-Sheng1

2020-09-17

10.1038/s41396-020-00775-z

ISME Journal   影响因子和分区

1751-7362

1751-7370

Cyanobacteria are photosynthetic prokaryotes that inhabit diverse aquatic and terrestrial environments. However, the evolutionary mechanisms involved in the cyanobacterial habitat adaptation remain poorly understood. Here, based on phylogenetic and comparative genomic analyses of 650 cyanobacterial genomes, we investigated the genetic basis of cyanobacterial habitat adaptation (marine, freshwater, and terrestrial). We show: (1) the expansion of gene families is a common strategy whereby terrestrial cyanobacteria cope with fluctuating environments, whereas the genomes of many marine strains have undergone contraction to adapt to nutrient-poor conditions. (2) Hundreds of genes are strongly associated with specific habitats. Genes that are differentially abundant in genomes of marine, freshwater, and terrestrial cyanobacteria were found to be involved in light sensing and absorption, chemotaxis, nutrient transporters, responses to osmotic stress, etc., indicating the importance of these genes in the survival and adaptation of organisms in specific habitats. (3) A substantial fraction of genes that facilitate the adaptation of Cyanobacteria to specific habitats are contributed by horizontal gene transfer, and such genetic exchanges are more frequent in terrestrial cyanobacteria. Collectively, our results further our understandings of the adaptations of Cyanobacteria to different environments, highlighting the importance of ecological constraints imposed by the environment in shaping the evolution of Cyanobacteria.

SCI

英语

NI期刊 ; NI论文

其他

National Natural Science Foundation of China (NSFC)[31900002][41830318]

Environmental Sciences & Ecology ; Microbiology

Ecology ; Microbiology

WOS:000570454700001

NATURE PUBLISHING GROUP

Web of Science

1.South China Normal Univ, Sch Life Sci, Guangzhou 510631, Peoples R China
2.Sun Yat Sen Univ, State Key Lab Biocontrol, Guangdong Key Lab Plant Resources, Sch Life Sci, Guangzhou 510275, Peoples R China
3.Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Hubei, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen Key Lab Marine Archaea Geoom, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China
6.Jinan Univ, Dept Ecol, Guangzhou 510632, Peoples R China
7.Jinan Univ, Inst Hydrobiol, Guangzhou 510632, Peoples R China

Chen, Meng-Yun,Teng, Wen-Kai,Zhao, Liang,et al. Comparative genomics reveals insights into cyanobacterial evolution and habitat adaptation[J]. ISME Journal,2020,15(1).

Chen, Meng-Yun.,Teng, Wen-Kai.,Zhao, Liang.,Hu, Chun-Xiang.,Zhou, Yang-Kai.,...&Shu, Wen-Sheng.(2020).Comparative genomics reveals insights into cyanobacterial evolution and habitat adaptation.ISME Journal,15(1).

Chen, Meng-Yun,et al."Comparative genomics reveals insights into cyanobacterial evolution and habitat adaptation".ISME Journal 15.1(2020).