Metagenomic analysis reveals wide distribution of phototrophic bacteria in hydrothermal vents on the ultraslow-spreading Southwest Indian Ridge  

作　　者：Hong Chen Deng Hui Li Ai Jun Jiang Xue Gong Li Shi Jun Wu Jian Wei Chen Meng Jie Qu Xiao Qing Qi Jie Dai Rui Zhao Wei-Jia Zhang Shan Shan Liu Long-Fei Wu 

机构地区：[1]Laboratory of Deep Sea Microbial Cell Biology,Institute of Deep Sea Science and Engineering,Chinese Academy of Sciences,Sanya,572000,China [2]University of Chinese Academy of Sciences,Beijing,100864,China [3]France-China Joint Laboratory for Evolution and Development of Magnetotactic Multicellular Organisms(LIA-MagMC),Marseille,France/Sanya,China [4]Institution of Deep-Sea Life Sciences,IDSSE-BGI,IDSTI-CAS/Hainan Deep-Sea Technology Laboratory,Sanya/Shenzhen,China [5]BGI-Qingdao,BGI-Shenzhen,Qingdao,266555,China [6]Zhejiang University,Hangzhou,310027,China [7]BGI-Shenzhen,Shenzhen,518083,China [8]Qingdao-Europe Advanced Institute for Life Sciences,BGI-Shenzhen,Qingdao,266555,China [9]Aix Marseille University,Centre national de la recherche scientifique,Laboratoire de Chimie Bactérienne,Institut de Microbiologie de la Méditerranée,L’Institut Microbiologie,Bioénergies et Biotechnologie,13402,Marseille,France

出　　处：《Marine Life Science & Technology》2022年第2期255-267,共13页海洋生命科学与技术（英文）

基　　金：supported by the National Key Research and Development Program of China(No.2018YFC0309904);the National Natural Science Foundation of China(Nos.91751202,41806174,91751108);the Key Research and Development Program of Hainan Province(No.ZDKJ2019011);Grant Y9719105 from the Institute of Deep-sea Technology Innovation,Chinese Academy of Sciences(IDSTI-CAS);Grant 2019YD16 from Sanya City and Grant INSB-DBM2021;support to LIA-MagMC from Centre National de la Recherche Scientifique.

摘　　要：Deep-sea hydrothermal vents are known as chemosynthetic ecosystems.However,high temperature vents emit light that hypothetically can drive photosynthesis in this habitat.Metagenomic studies have sporadically reported the occurrence of phototrophic populations such as cyanobacteria in hydrothermal vents.To determine how geographically and taxonomically widespread phototrophs are in deep-sea hydrothermal vents,we collected samples from three niches in a hydrothermal vent on the Southwest Indian Ridge and carried out an integrated metagenomic analysis.We determined the typical community structures of microorganisms found in active venting fields and identified populations of known potential chlorophototrophs and retinalophototrophs.Complete chlorophyll biosynthetic pathways were identified in all samples.By contrast,proteorhodopsins were only found in active beehive smoker diffusers.Taxonomic groups possessing potential phototrophy dependent on semiconductors present in hydrothermal vents were also found in these samples.This systematic comparative metagenomic study reveals the widespread distribution of phototrophic bacteria in hydrothermal vent fields.Our results support the hypothesis that the ocean is a seed bank of diverse microorganisms.Geothermal vent light may provide energy and confer a competitive advantage on phototrophs to proliferate in hydrothermal vent ecosystems.

关 键 词：CHLOROPHYLL RHODOPSIN Phototrophic bacteria Hydrothermal vent Southwest Indian Ridge 

分 类 号：X17[环境科学与工程—环境科学]