The genome of a vestimentiferan tubeworm (Ridgeia piscesae) provides insights into its adaptation to a deep-sea environment

BMC Genomics

Research

Meng Liu¹  Hong Shi²  Lingwei Ruan²  Feng Yang²  Runying Zeng²  Mingliang Chen²  Jianming Chen³  Yuanyuan Wang⁴  Zixuan Liu⁴  Long Zhang⁴  Changjun Guo⁵  Jianguo He⁵  Jian He⁵  Muhua Wang⁵ 

[1] Novogene Bioinformatics Institute, 100083, Beijing, China;State Key Laboratory Breeding Base of Marine Genetic Resources, Key Laboratory of Marine Genetic Resources of Ministry of Natural Resources, Fujian Key Laboratory of Marine Genetic Resources, Ministry of Natural Resources, Third Institute of Oceanography, 361005, Xiamen, China;State Key Laboratory Breeding Base of Marine Genetic Resources, Key Laboratory of Marine Genetic Resources of Ministry of Natural Resources, Fujian Key Laboratory of Marine Genetic Resources, Ministry of Natural Resources, Third Institute of Oceanography, 361005, Xiamen, China;Fujian Key Laboratory On Conservation and Sustainable Utilization of Marine Biodiversity, Fuzhou Institute of Oceanography, Minjiang University, 350108, Fuzhou, China;State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine Sciences, Sun Yat-Sen University, 519082, Zhuhai, China;State Key Laboratory for Biocontrol, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Marine Sciences, Sun Yat-Sen University, 519082, Zhuhai, China;China-ASEAN Belt and Road Joint Laboratory On Mariculture Technology, Guangdong Province Key Laboratory for Aquatic Economic Animals, School of Life Sciences, Sun Yat-Sen University, 510275, Guangzhou, China;

关键词: Vestimentiferan tubeworm;    Ridgeia piscesae;    Hydrothermal vent;    Genome evolution;    Deep-sea adaptation;   

DOI  :  10.1186/s12864-023-09166-y

 received in 2022-10-11, accepted in 2023-02-03,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundVestimentifera (Polychaeta, Siboglinidae) is a taxon of deep-sea worm-like animals living in deep-sea hydrothermal vents, cold seeps, and organic falls. The morphology and lifespan of Ridgeia piscesae, which is the only vestimentiferan tubeworm species found in the hydrothermal vents on the Juan de Fuca Ridge, vary greatly according to endemic environment. Recent analyses have revealed the genomic basis of adaptation in three vent- and seep-dwelling vestimentiferan tubeworms. However, the evolutionary history and mechanism of adaptation in R. piscesae, a unique species in the family Siboglinidae, remain to be investigated.ResultWe assembled a draft genome of R. piscesae collected at the Cathedral vent of the Juan de Fuca Ridge. Comparative genomic analysis showed that vent-dwelling tubeworms with a higher growth rate had smaller genome sizes than seep-dwelling tubeworms that grew much slower. A strong positive correlation between repeat content and genome size but not intron size and the number of protein-coding genes was identified in these deep-sea tubeworm species. Evolutionary analysis revealed that Ridgeia pachyptila and R. piscesae, the two tubeworm species that are endemic to hydrothermal vents of the eastern Pacific, started to diverge between 28.5 and 35 million years ago. Four genes involved in cell proliferation were found to be subject to positive selection in the genome of R. piscesae.ConclusionRidgeia pachyptila and R. piscesae started to diverge after the formation of the Gorda/Juan de Fuca/Explorer ridge systems and the East Pacific Rise. The high growth rates of vent-dwelling tubeworms might be derived from their small genome sizes. Cell proliferation is important for regulating the growth rate in R. piscesae.

【 授权许可】

CC BY   
© The Author(s) 2023

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