Arid
DOI10.1089/ast.2009.0351
Laser-Induced Fluorescence Emission (LIFE): In Situ Nondestructive Detection of Microbial Life in the Ice Covers of Antarctic Lakes
Storrie-Lombardi, Michael C.1; Sattler, Birgit2
通讯作者Storrie-Lombardi, Michael C.
来源期刊ASTROBIOLOGY
ISSN1531-1074
EISSN1557-8070
出版年2009
卷号9期号:7页码:659-672
英文摘要

Laser-induced fluorescence emission (L.I.F.E.) images were obtained in situ following 532 nm excitation of cryoconite assemblages in the ice covers of annual and perennially frozen Antarctic lakes during the 2008 Tawani International Expedition to Schirmacher Oasis and Lake Untersee in Dronning Maud Land, Antarctica. Laser targeting of a single millimeter-scale cryoconite results in multiple neighboring excitation events secondary to ice/air interface reflection and refraction in the bubbles surrounding the primary target. Laser excitation at 532 nm of cyanobacteria-dominated assemblages produced red and infrared autofluorescence activity attributed to the presence of phycoerythrin photosynthetic pigments. The method avoids destruction of individual target organisms and does not require the disruption of either the structure of the microbial community or the surrounding ice matrix. L. I. F. E. survey strategies described may be of interest for orbital monitoring of photosynthetic primary productivity in polar and alpine glaciers, ice sheets, snow, and lake ice of Earth’s cryosphere. The findings open up the possibility of searching from either a rover or from orbit for signs of life in the polar regions of Mars and the frozen regions of exoplanets in neighboring star systems.


英文关键词Cryosphere Ice Mars Photosynthesis Psychrophiles
类型Article
语种英语
国家USA ; Austria
收录类别SCI-E
WOS记录号WOS:000270134600006
WOS关键词BIOLOGICAL-MATERIALS ; RAMAN-SPECTROSCOPY ; CRYOCONITE HOLES ; EAST ANTARCTICA ; SNOWBALL EARTH ; FRESH-WATER ; GLACIER ; SYNECHOCOCCUS ; CYANOBACTERIA ; COMMUNITIES
WOS类目Astronomy & Astrophysics ; Biology ; Geosciences, Multidisciplinary
WOS研究方向Astronomy & Astrophysics ; Life Sciences & Biomedicine - Other Topics ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/159844
作者单位1.Kinohi Inst, Pasadena, CA 91101 USA;
2.Univ Innsbruck, Inst Ecol, A-6020 Innsbruck, Austria
推荐引用方式
GB/T 7714
Storrie-Lombardi, Michael C.,Sattler, Birgit. Laser-Induced Fluorescence Emission (LIFE): In Situ Nondestructive Detection of Microbial Life in the Ice Covers of Antarctic Lakes[J],2009,9(7):659-672.
APA Storrie-Lombardi, Michael C.,&Sattler, Birgit.(2009).Laser-Induced Fluorescence Emission (LIFE): In Situ Nondestructive Detection of Microbial Life in the Ice Covers of Antarctic Lakes.ASTROBIOLOGY,9(7),659-672.
MLA Storrie-Lombardi, Michael C.,et al."Laser-Induced Fluorescence Emission (LIFE): In Situ Nondestructive Detection of Microbial Life in the Ice Covers of Antarctic Lakes".ASTROBIOLOGY 9.7(2009):659-672.
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