Survival strategies of Rhinocladiella similis in perchlorate-rich Mars like environments.

IF 4.4 1区 物理与天体物理 Q1 MULTIDISCIPLINARY SCIENCES
Alef Dos Santos, Júnia Schultz, Felipe Oliveira Souza, Lucas Rodrigues Ribeiro, Thiago Verano Braga, Eduardo Jorge Pilau, Edson Rodrigues-Filho, Alexandre Soares Rosado
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Abstract

Studying the survival of terrestrial microorganisms under Martian conditions, particularly in the presence of perchlorates, provides crucial insights for astrobiology. This research investigates the resilience of the extremophile black fungus Rhinocladiella similis to magnesium perchlorate and UV-C radiation. Results show R. similis, known for its tolerance to acidic conditions, exhibits remarkable resistance to UV-C radiation combined with perchlorate, as well as to high concentrations of magnesium perchlorate, surpassing Exophiala sp. strain 15Lv1, a eukaryotic model organism for Mars-like conditions. Growth curve analyses revealed both strains can thrive in perchlorate concentrations mimicking Martian perchlorate-rich environments, with R. similis adapting better to higher concentrations. Morphological and protein production changes were investigated, and mass spectrometry identified perchlorate-induced proteins, advancing molecular understanding of potential microbial life on Mars. These findings advance knowledge of extremophile capabilities, contributing to the search for life beyond Earth and informing the design of future Martian rovers equipped for biosignature detection.

类似鼻枝菌在高氯酸盐丰富的火星环境中的生存策略。
研究火星条件下陆地微生物的生存,特别是在高氯酸盐存在的情况下,为天体生物学提供了至关重要的见解。本研究探讨了嗜极真菌黑菌对高氯酸镁和UV-C辐射的恢复能力。结果表明,以耐酸性环境而闻名的相似弧菌(r.s similis)对高氯酸盐和高浓度高氯酸镁的UV-C辐射表现出了显著的抗性,超过了Exophiala sp.菌株15Lv1,这是一种在类似火星环境下生存的真核模式生物。生长曲线分析显示,这两种菌株都可以在模拟火星高氯酸盐丰富环境的高氯酸盐浓度下茁壮成长,相似弧菌更适应更高的浓度。研究了形态和蛋白质生产的变化,质谱鉴定了高氯酸盐诱导的蛋白质,促进了对火星上潜在微生物生命的分子认识。这些发现推进了对极端微生物能力的认识,有助于寻找地外生命,并为未来配备生物特征探测设备的火星探测器的设计提供信息。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
npj Microgravity
npj Microgravity Physics and Astronomy-Physics and Astronomy (miscellaneous)
CiteScore
7.30
自引率
7.80%
发文量
50
审稿时长
9 weeks
期刊介绍: A new open access, online-only, multidisciplinary research journal, npj Microgravity is dedicated to publishing the most important scientific advances in the life sciences, physical sciences, and engineering fields that are facilitated by spaceflight and analogue platforms.
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