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  4. Selection of Anabaena sp. PCC 7938 as a Cyanobacterium Model for Biological ISRU on Mars
 
Zitierlink DOI
10.26092/elib/3172
Verlagslink DOI
10.1128/aem.00594-22

Selection of Anabaena sp. PCC 7938 as a Cyanobacterium Model for Biological ISRU on Mars

Veröffentlichungsdatum
2022-07-12
Autoren
Ramalho, Tiago P.  
Chopin, Guillaume  
Pérez Carrascal, Olga Maria  
Tromas, Nicolas  
Verseux, Cyprien  
Zusammenfassung
Crewed missions to Mars are expected to take place in the coming decades. After short-term stays, a permanent presence will be desirable to enable a wealth of scientific discoveries. This will require providing crews with life-support consumables in amounts that are too large to be imported from Earth. Part of these consumables could be produced on site with bioprocesses, but the feedstock should not have to be imported. A solution under consideration lies in using diazotrophic, rock-weathering cyanobacteria as primary producers: fed with materials naturally available on site, they would provide the nutrients required by other organisms. This concept has recently gained momentum but progress is slowed by a lack of consistency across contributing teams, and notably of a shared model organism. With the hope to address this issue, we present the work performed to select our current model. We started with preselected strains from the Nostocaceae family. After sequencing the genome of Anabaena sp. PCC 7938—the only one not yet available—we compared the strains’ genomic data to determine their relatedness and provide insights into their physiology. We then assessed and compared relevant features: chiefly, their abilities to utilize nutrients from Martian regolith, their resistance to perchlorates (toxic compounds present in the regolith), and their suitability as feedstock for secondary producers (here a heterotrophic bacterium and a higher plant). This led to the selection of Anabaena sp. PCC 7938, which we propose as a model cyanobacterium for the development of bioprocesses based on Mars’s natural resources.
Schlagwörter
Space exploration

; 

Biological life-support systems

; 

Perchlorate resistance

; 

Geomicrobiology

; 

In situ resource utilization
Verlag
American Society for Microbiology
Institution
Universität Bremen  
Fachbereich
Zentrum für angewandte Raumfahrttechnologie und Mikrogravitation (ZARM)  
Dokumenttyp
Artikel/Aufsatz
Zeitschrift/Sammelwerk
Applied and Environmental Microbiology  
Band
88
Heft
15
Zweitveröffentlichung
Ja
Dokumentversion
Postprint
Lizenz
https://creativecommons.org/licenses/by/4.0/
Sprache
Englisch
Dateien
Lade...
Vorschaubild
Name

Ramalho_Verseux_et al_Selection of Anabaena sp PCC 7938 as a Cyanobacterium Model_2022_accepted-version.pdf

Size

2.33 MB

Format

Adobe PDF

Checksum

(MD5):8970f2144dfbdf2e93fd519557f89bef

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