Characterization and diversity of magnetotactic bacteria from sediments of Caroline Seamount in the Western Pacific Ocean

作     者：Kaixuan CUI Wenyan ZHANG Jia LIU Cong XU Yicong ZHAO Si CHEN Hongmiao PAN Tian XIAO Long-Fei WU Kaixuan CUI;Wenyan ZHANG;Jia LIU;Cong XU;Yicong ZHAO;Si CHEN;Hongmiao PAN;Tian XIAO;Long-Fei WU

作者机构：CAS Key Laboratory of Marine Ecology and Environmental SciencesInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Ecology and Environmental SciencePilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy of SciencesBeijing 100049China Center for Ocean Mega-ScienceChinese Academy of SciencesQingdao 266071China International Associated Laboratory of Evolution and Development of Magnetotactic Multicellular Organisms(LIA-MagMC)CNRS-CASQingdao 266071China Aix Marseille UnivCNRSLCBIM2BIMMMarseille 13009France National Oceanographic CenterQingdao 266071China 

出 版 物：《Journal of Oceanology and Limnology》 (海洋湖沼学报（英文）)

年 卷 期：2021年第39卷第6期

页      面：2027-2043页

核心收录：

学科分类：0710[理学-生物学] 1007[医学-药学(可授医学、理学学位)] 100705[医学-微生物与生化药学] 07[理学] 071005[理学-微生物学] 10[医学] 

基　　金：Supported by the National Natural Science Foundation of China(Nos.41776130,41776131) the National Natural Science Foundation of China,Shandong Joint Fund(No.U1706208) the Youth Talent Support Program of the Laboratory for Marine Ecology and Environmental Science,Pilot National Laboratory for Marine Science and Technology(Qingdao)(No.LMEES-YTSP-2018-01-07) the Science&Technology Basic Resources Investigation Program of China(No.2017FY100803) 

主　　题：magnetotactic bacteria Caroline Seamount abundance diversity magnetosome 

摘      要：Magnetotactic bacteria(MTB)are a group of microorganisms capable of orientating and swimming along magnetic fields because they contain intracellular biomineralized magnetosomes composed of magnetite(Fe 3 O 4)or/and greigite(Fe_(3)S_(4)).They are ubiquitous in freshwater,brackish,and marine habitats,and are cosmopolitan in ***,knowledge of their occurrence and distribution in seamount ecosystems is *** investigated the diversity and distribution of MTB in the Caroline Seamount(CM4).The abundance of living MTB in 12 stations in depth varying from 90 to 1545 m was 1.1×10^(3)-43.7×10^(3) inds./dm *** diverse shapes of MTB observed,magnetotactic cocci were the dominant morphotype and could be categorized into two types:1)typical cocci that appeared to have peritrichous fl agella;and 2)those characterized by having a drop-shaped form and one bundle of fl agella located at the thin/narrow end of the *** electron microscopy(TEM)analysis revealed that the magnetosomes formed by those magnetotactic cocci are magnetite(Fe 3 O 4)with octahedral crystal habit.A total of 41 operational taxonomic units(OTUs)of putative MTB(2702 reads)were acquired from nine stations,based on high-throughput *** these,40 OTUs belonged to the Proteobacteria phylum and one belonged to the Nitrospirae *** found apparent connectivity between the MTB populations on the Caroline and Kexue(Science in Chinese)seamounts,although the diversity of MTB on Caroline was much richer than on the Kexue *** results imply that the unique topography of seamounts and other as-yet unclear environmental factors could lead to evolution of different fl agella arrangements in magnetotactic cocci,and the occurrence of octahedral magnetite magnetosomes.