Characterization of Mediterranean Magnetotactic Bacteria

作     者：Lefevre Christopher Bemadac Alain Pradel Nathalie WU Longfei Yu-Zhang Kui XIAO Tian Yonnet Jean-Paul Lebouc Afef SONG Tao Fukumori Yoshihiro 

作者机构：Laboratoire de Chimie Bactkrienne UPR 9043 CNRS Marseille France Service de Microscopic Electronique lnstitut de Biologic Structurale et Microbiologie CNRS Marseille France Laboratoire de Microscopies et d＇Etude de Nanostructures （LMEN） Universite de Reims Champagne-Ardenne 51687 Reims cedex 2 France Key Laboratory of Marine Ecology and Environmental Sciences Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 P. R. China Laboratoire d＇Electrotechnique de Grenoble Institut National Polytechniques de Grenoble F-38402 Saint Martin d＇eres Cedex France Institute of Electrical Engineering Chinese Academy of Science Beijing 100080 P. R. China Department of Life Science Graduate School of Nataral Science and Technology Kanazawa University Kanazawa Japan 

出 版 物：《Journal of Ocean University of China》 (中国海洋大学学报（英文版）)

年 卷 期：2007年第6卷第4期

页      面：355-359页

学科分类：0710[理学-生物学] 070702[理学-海洋化学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 0815[工学-水利工程] 0824[工学-船舶与海洋工程] 

基　　金：2006-1-15 2006CB400604 Ocean University of China,OUC 

主　　题：Magnetotactic bacteria Mediterranean Sea geomagnetism biogeochemical cycling ecology magnetosome crystals 

摘      要：Magnetotactic bacteria are a diverse group of motile prokaryotes that are ubiquitous in aquatic habitats and cosmopolitan in distribution. In this study, we collected magnetotactic bacteria from the Mediterranean Sea. A remarkable diversity of morphotypes was observed, including multicellular types that seemed to differ from those previously found in North and South America. Another interesting organism was one with magnetosomes arranged in a six-stranded bundle which occupied one third of the cell width. The magnetosome bundle was evident even under optic microscopy. These cells were connected together and swam as a linear entire unit. Magnetosomes did not always align up to form a straight linear chain. A chain composed of rectangle magnetosomes bent at a posi- tion with an oval crystal. High resolution transmission electron microscopy analysis of the crystal at the pivotal position suggested uncompleted formation of the crystal. This is the first report of Mediterranean magnetotactic bacteria, which should be useful for studies of biogeochemical cycling and geohistory of the Mediterranean Sea.