温度、氯化物和高氯酸盐浓度对放射球菌代谢活动的影响。

IF 2.6 3区 生物学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY
Eftychia Symeonidou, Uffe Gråe Jørgensen, Morten Bo Madsen, Anders Priemé
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引用次数: 0

摘要

嗜极细菌辐射球菌(Deinococcus radiodurans)的特点是能够在高辐射水平下存活并维持其活性,因此被认为是一种可能在地外环境中存活的生物。在本研究中,我们研究了温度和含氯盐类(重点是在火星沉积岩中检测到的高浓度高氯酸盐)对放射球菌活性(二氧化碳产生率)和在液体培养物中培养长达 30 天后的存活率的综合影响。在 0 ℃ 或 25 ℃ 条件下培养期间,当高氯酸盐浓度(高达 10% w/v)较高时,可观察到 Diodurans 产生二氧化碳的能力和存活率降低。随着高氯酸盐和氯盐浓度的增加以及温度的降低,代谢活性和存活率都降低了,而且发现温度和盐浓度对代谢活性有交互影响。这些结果表明,D. radiodurans 能够在富含高氯酸盐的低温环境中保持代谢活性并存活下来。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effects of temperature, chloride and perchlorate salt concentration on the metabolic activity of Deinococcus radiodurans.

Effects of temperature, chloride and perchlorate salt concentration on the metabolic activity of Deinococcus radiodurans.

The extremophile bacterium Deinococcus radiodurans is characterized by its ability to survive and sustain its activity at high levels of radiation and is considered an organism that might survive in extraterrestrial environments. In the present work, we studied the combined effects of temperature and chlorine-containing salts, with focus on perchlorate salts which have been detected at high concentrations in Martian regolith, on D. radiodurans activity (CO2 production rates) and viability after incubation in liquid cultures for up to 30 days. Reduced CO2 production capacity and viability was observed at high perchlorate concentrations (up to 10% w/v) during incubation at 0 or 25 °C. Both the metabolic activity and viability were reduced as the perchlorate and chloride salt concentration increased and temperature decreased, and an interactive effect of temperature and salt concentration on the metabolic activity was found. These results indicate the ability of D. radiodurans to remain metabolically active and survive in low temperature environments rich in perchlorate.

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来源期刊
Extremophiles
Extremophiles 生物-生化与分子生物学
CiteScore
6.80
自引率
6.90%
发文量
28
审稿时长
2 months
期刊介绍: Extremophiles features original research articles, reviews, and method papers on the biology, molecular biology, structure, function, and applications of microbial life at high or low temperature, pressure, acidity, alkalinity, salinity, or desiccation; or in the presence of organic solvents, heavy metals, normally toxic substances, or radiation.
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