生命的上限温度——我们如何界定？

The upper temperature of life--where do we draw the line?

作者信息

Cowen D A

机构信息

Department of Biotechnology, University of Western Cape, Bellville, Cape Town, South Africa.

出版信息

Trends Microbiol. 2004 Feb;12(2):58-60. doi: 10.1016/j.tim.2003.12.002.

DOI:10.1016/j.tim.2003.12.002

PMID:15040324

Abstract

A new archaeal isolate has been reported that is capable of growing at up to 121 degrees C. The hyperthermophile, dubbed strain 121, grows chemoautotrophically using formate as an electron donor and FeIII as an electron acceptor and is closely related to members of the archaeal genera Pyrodictium and Pyrobaculum. Although the reported maximum growth temperature of strain 121 is 8 degrees C higher than the previous record holder (Pyrolobus fumarii; Tmax = 113 degrees C), the two organisms have virtually the same optimal growth temperatures.

摘要

据报道，一种新的古菌分离株能够在高达121摄氏度的环境中生长。这种嗜热菌被命名为121菌株，它以甲酸盐作为电子供体、以FeIII作为电子受体进行化学自养生长，并且与古菌属嗜热栖热菌和嗜热栖芽孢杆菌的成员密切相关。尽管报道的121菌株的最高生长温度比之前的纪录保持者（嗜热栖热菌；最高温度 = 113摄氏度）高8摄氏度，但这两种生物的最佳生长温度几乎相同。