看板Biology
标 题Re: [问题]问一篇研究的重要性
发信站KKCITY (Sat Oct 21 02:38:24 2006)
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※ 引述《[email protected] (六百)》之铭言:
> http://udn.com/NEWS/NATIONAL/NAT5/3567269.shtml
> 还没抓到全文
> 偷懒上来问一下有没有人已经看过了?
> 就媒体的介绍来说实在看不太出个所以然
> 以硫化物为能量来源的生物不是早被发现了吗? 课本里都有了...
> 这篇的突破又在哪里呢?
> 是因为另一个不同的代谢路径 或者是说因为整个生物群系都如此
> 或者是因为是一个几乎封闭的环境?
Hyperthermophile吗? Pyrolobus fumarii吗? 有兴趣的人可以比较一下以下两篇
(第一篇为本期Science的摘要, 也就是新闻里所述的文章)
http://www.sciencemag.org/cgi/content/abstract/314/5798/479
Science 20 October 2006: Vol. 314. no. 5798, pp. 479 - 482
Long-Term Sustainability of a High-Energy, Low-Diversity Crustal Biome
Li-Hung Lin,1,2* Pei-Ling Wang,3 Douglas Rumble,4 Johanna Lippmann-Pipke,5
Erik Boice,6 Lisa M. Pratt,6 Barbara Sherwood Lollar,7 Eoin L. Brodie,8 Terry
C. Hazen,8 Gary L. Andersen,8 Todd Z. DeSantis,8 Duane P. Moser,9 Dave
Kershaw,10 T. C. Onstott1
Geochemical, microbiological, and molecular analyses of alkaline saline
groundwater at 2.8 kilometers depth in Archaean metabasalt revealed a
microbial biome dominated by a single phylotype affiliated with thermophilic
sulfate reducers belonging to Firmicutes. These sulfate reducers were
sustained by geologically produced sulfate and hydrogen at concentrations
sufficient to maintain activities for millions of years with no apparent
reliance on photosynthetically derived substrates.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=search&term=10376671
FEBS Lett. 1999 Jun 4;452(1-2):22-5
Minireview: Extremophiles and their adaptation to hot environments.
Stetter KO.
Water-containing terrestrial, subterranean and submarine high temperature
areas harbor a variety of hyperthermophilic bacteria and archaea which are
able to grow optimally above 80 degrees C. Hyperthermophiles are adapted to
hot environments by their physiological and nutritional requirements. As a
consequence, cell components like proteins, nucleic acids and membranes have
to be stable and even function best at temperatures around 100 degrees C. The
chemolithoautotrophic archaeon Pyrolobus fumarii is able to grow at 113
degrees C and, therefore, represents the upper temperature border of life.
For the first time, (vegetative) cultures of Pyrolobus and Pyrodictium are
able to survive autoclaving.
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