Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1006/icar.1999.6307 |
Proximal analysis of regolith habitats and protective biomolecules in situ by laser Raman spectroscopy: Overview of terrestrial Antarctic habitats and Mars analogs | |
Wynn-Williams, DD; Edwards, HGM | |
来源期刊 | ICARUS |
ISSN | 0019-1035 |
EISSN | 1090-2643 |
出版年 | 2000 |
卷号 | 144期号:2页码:486-503 |
英文摘要 | Fourier-transform laser Raman spectroscopy in the near infrared (1064 nm) has been used to characterize a variety of key pigments and biomolecules produced by cyanobacteria and other stress-tolerant microbes in material from extreme Antarctic cold deserts analogous to martian habitats. These compounds include photosynthetic pigments and sunscreens to protect against harmful UV radiation in the light zone (chlorophyll, scytonemin, beta-carotene) and photoprotective minerals, such as silica containing iron (III) oxide. Calcium oxalate mono- and dihydrate produced as a result of the biological weathering processes and stress-protective compounds, necessary to protect organisms against desiccation, freezing temperatures, and hypersalinity, such as water-replacement molecules (trehalose), are also monitored. From the results obtained using Antarctic samples, it is shown that a laser-based system can be used to characterize biomolecules in their natural state within their mineral microhabitats. Because of the similarities between the Antarctic cold desert ecosystems, which represent some of the most extreme terrestrial environmental habitats, and putative martian analogs, the laser-Raman spectrosocopic approach is proposed for the detection of former life on Mars analogs to terrestrial cyanobacteria under stress, such as stromatolites, evaporites, and endolithic communities. To this end, the spectral database that is being accumulated from laser-Raman studies of these Antarctic communities will provide a resource of potential biomarkers for future remote laser-Raman analysis on future Mars missions. (C) 2000 Academic Press. |
英文关键词 | exobiology Mars surface organic chemistry spectroscopy regolith |
类型 | Article ; Proceedings Paper |
语种 | 英语 |
收录类别 | SCI-E ; CPCI-S |
WOS记录号 | WOS:000086494000023 |
WOS关键词 | CHROOCOCCIDIOPSIS SP CHROOCOCCALES ; CYANOBACTERIUM NOSTOC COMMUNE ; ULTRAVIOLET-RADIATION ; CRYPTOENDOLITHIC CYANOBACTERIA ; MINERAL IDENTIFICATION ; MARTIAN SURFACE ; MICROBIAL MATS ; VICTORIA-LAND ; WATER-STRESS ; COLD DESERT |
WOS类目 | Astronomy & Astrophysics |
WOS研究方向 | Astronomy & Astrophysics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/139106 |
推荐引用方式 GB/T 7714 | Wynn-Williams, DD,Edwards, HGM. Proximal analysis of regolith habitats and protective biomolecules in situ by laser Raman spectroscopy: Overview of terrestrial Antarctic habitats and Mars analogs[J],2000,144(2):486-503. |
APA | Wynn-Williams, DD,&Edwards, HGM.(2000).Proximal analysis of regolith habitats and protective biomolecules in situ by laser Raman spectroscopy: Overview of terrestrial Antarctic habitats and Mars analogs.ICARUS,144(2),486-503. |
MLA | Wynn-Williams, DD,et al."Proximal analysis of regolith habitats and protective biomolecules in situ by laser Raman spectroscopy: Overview of terrestrial Antarctic habitats and Mars analogs".ICARUS 144.2(2000):486-503. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。