生物谷：美國黃石國家公園是一片神奇的土地,。研究人員在這里發(fā)現(xiàn)了一種罕見細(xì)菌,，它們能像綠色植物一樣把光能轉(zhuǎn)化成維持自身生存的生物能,。在能源問題日益突出的今天，這種細(xì)菌的發(fā)現(xiàn)有助于人們更好地開發(fā)利用光能,。
賓夕法尼亞州立大學(xué)生物技術(shù)教授唐·布賴恩特及其研究小組說,，這種細(xì)菌嗜熱，屬于酸桿菌。相關(guān)研究報(bào)告發(fā)表在27日出版的《科學(xué)》雜志上,。
研究人員說,，目前雖然人們已知還有其他能夠生成葉綠素的細(xì)菌，但新發(fā)現(xiàn)的細(xì)菌與它們有很大不同,。
這種細(xì)菌長有許多觸角,，叫做集光綠色體。每個觸角含有大量葉綠素,。正是這些葉綠素使得細(xì)菌能夠在菌苔上同其他細(xì)菌爭奪陽光,，維持生存。這種細(xì)菌是人們迄今發(fā)現(xiàn)的第一種含有集光綠色體的喜氧微生物,。
研究人員在分析這種細(xì)菌的基因序列時發(fā)現(xiàn),，與它親緣關(guān)系最近的是生活在黃石公園猛犸溫泉以及中國西藏和泰國的溫泉中的一些嗜熱細(xì)菌。（人民網(wǎng)）
原始出處:
Science 27 July 2007:
Vol. 317. no. 5837, pp. 523 - 526
DOI: 10.1126/science.1143236
Candidatus Chloracidobacterium thermophilum: An Aerobic Phototrophic Acidobacterium
Donald A. Bryant,1* Amaya M. Garcia Costas,1 Julia A. Maresca,1 Aline Gomez Maqueo Chew,1 Christian G. Klatt,2 Mary M. Bateson,2 Luke J. Tallon,3 Jessica Hostetler,3 William C. Nelson,3 John F. Heidelberg,3,4 David M. Ward2
Only five bacterial phyla with members capable of chlorophyll (Chl)–based phototrophy are presently known. Metagenomic data from the phototrophic microbial mats of alkaline siliceous hot springs in Yellowstone National Park revealed the existence of a distinctive bacteriochlorophyll (BChl)–synthesizing, phototrophic bacterium. A highly enriched culture of this bacterium grew photoheterotrophically, synthesized BChls a and c under oxic conditions, and had chlorosomes and type 1 reaction centers. "Candidatus Chloracidobacterium thermophilum" is a BChl-producing member of the poorly characterized phylum Acidobacteria.
1 Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802, USA.
2 Department of Land Resources and Environmental Sciences, Montana State University, Post Office Box 173120, Bozeman, MT 59717–3120, USA.
3 The Institute for Genomic Research, 9712 Medical Center Drive, Rockville, MD 20850, USA.
4 Department of Biology, University of Southern California, Wrigley Marine Science Center, Post Office Box 5069, Avalon, CA 90704, USA.
Present address: Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Present address: Department of Microbiology, Ohio State University, Columbus, OH 43210, USA.
* To whom correspondence should be addressed. E-mail: [email protected]
