geomatrix辅助激光解吸/电离质谱法分析火星全球模拟物（MGS-1）上沉积的微生物脂质

IF 1.7 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

International Journal of Astrobiology Pub Date : 2021-04-07 DOI:10.1017/S1473550421000100

Alef dos Santos, E. Rodrigues-Filho, M. Homem

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引用次数: 1

摘要

脂质是一种有机物质，可以作为生物信号，指示环境中的生命。我们提出了一项实验研究，通过geomatrix辅助激光解吸/电离质谱法（GALDI-MS）分析沉积在火星全球模拟物（MGS-1）风化层上的微生物来源的脂质。我们的研究结果表明，在这些火星土壤模拟样本中可以检测到来自黑酵母菌株完整微生物细胞的脂质。这些脂质分子主要与GALDI-MS光谱中加合物的出现有关。研究结果有助于规划未来的行星任务。

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Analysis of microbial lipids deposited on Mars Global Simulant (MGS-1) by geomatrix-assisted laser desorption/ionization-mass spectrometry

Lipids are among the organic substances that can work as biosignatures, indicating life in an environment. We present an experimental investigation concerning analysis of lipids from a microbial source deposited on the Mars Global Simulant (MGS-1) regolith by geomatrix-assisted laser desorption/ionization-mass spectrometry (GALDI-MS). Our results indicate that lipids from intact microbial cells of a black yeast strain can be detected in these mimetic samples of Martian soil. These lipid molecules are predominantly associated with the occurrence of adducts in the GALDI-MS spectra. The results can be helpful in the planning of future planetary missions.

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来源期刊

International Journal of Astrobiology 地学天文-地球科学综合

CiteScore

3.70

自引率

11.80%

发文量

审稿时长

>12 weeks

期刊介绍： International Journal of Astrobiology is the peer-reviewed forum for practitioners in this exciting interdisciplinary field. Coverage includes cosmic prebiotic chemistry, planetary evolution, the search for planetary systems and habitable zones, extremophile biology and experimental simulation of extraterrestrial environments, Mars as an abode of life, life detection in our solar system and beyond, the search for extraterrestrial intelligence, the history of the science of astrobiology, as well as societal and educational aspects of astrobiology. Occasionally an issue of the journal is devoted to the keynote plenary research papers from an international meeting. A notable feature of the journal is the global distribution of its authors.