Survival of Akinetes (Resting-State Cells of Cyanobacteria) in Low Earth Orbit and Simulated Extraterrestrial Conditions

@article{OlssonFrancis2009SurvivalOA,
  title={Survival of Akinetes (Resting-State Cells of Cyanobacteria) in Low Earth Orbit and Simulated Extraterrestrial Conditions},
  author={Karen Olsson-Francis and R. de la Torre and Martin C. Towner and Charles S. Cockell},
  journal={Origins of Life and Evolution of Biospheres},
  year={2009},
  volume={39},
  pages={565-579}
}
Cyanobacteria are photosynthetic organisms that have been considered for space applications, such as oxygen production in bioregenerative life support systems, and can be used as a model organism for understanding microbial survival in space. Akinetes are resting-state cells of cyanobacteria that are produced by certain genera of heterocystous cyanobacteria to survive extreme environmental conditions. Although they are similar in nature to endospores, there have been no investigations into the… 
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References

SHOWING 1-10 OF 37 REFERENCES
Akinetes of the Cyanobacterium Nostoc PCC 7524: Macromolecular Composition, Structure and Control of Differentiation
Summary: Synchronized akinete differentiation occurred following the transition from exponential to non-exponential (linear) growth, the major trigger being energy limitation. Young akinetes first
On the germination of the akinete-forming cyanobacterium Gloeotrichia echinulata, in Lake Erken, Sweden
TLDR
Prolonged recruitment from the sediment strongly promoted establishment of the species in the water, especially G. echinulata, implying that processes of growth and division in theWater are important for the maximum size of the pelagic population.
Mechanisms of desiccation tolerance in cyanobacteria
TLDR
Drying of cells leads to damage resulting from crowding of cytoplasmic components, condensation of the nucleoid, increases in the Tm of membrane phase transitions, and imposition of stress upon cell walls, which restricts many organisms to aqueous environments, some, including many cyanobacteria, can tolerate the air-dried state for prolonged periods.
AKINETE PRODUCTION OF ANABAENA LEMMERMANNII AND A. CYLINDRICA (CYANOPHYCEAE) IN NATURAL POPULATIONS OF N‐ AND P‐LIMITED COASTAL MESOCOSMS 1
A strong biomass increase of two Anabaena species was observed in natural plankton community enclosed into nine large mesocosms (51 m3) and manipulated with mineral nutrients and an organic carbon
Effects of nitrogen limitation and starvation on Chroococcidiopsis sp. (Chroococcales)
TLDR
N-limited and N-starved cells recovered their cellular organization and physiological activities upon N repletion and had a spore-like form, and were functionally comparable to akinetes.
Algae and Cyanobacteria in Extreme Environments
TLDR
This book discusses phototrophs in hot alkaline and acidic environments and non-thermal acidic habitats, as well as the potential role of cyanobacteria in restoration and afforestation in mangrove ecosystems.
PHOTOSYNTHETIC CHARACTERIZATION OF DEVELOPING AND MATURE AKINETES OF APHANIZOMENON OVALISPORUM (CYANOPROKARYOTA) 1
Akinetes, differentiated resting cells produced by many species of filamentous, heterocystous cyanobacteria, enable the organism to survive adverse conditions, such as cold winters and dry seasons,
From the deep sea to the stars: human life support through minimal communities.
Effect of Shadowing on Survival of Bacteria under Conditions Simulating the Martian Atmosphere and UV Radiation
TLDR
The survival of soil-associated wild-type spores under Martian conditions could have repercussions for forward contamination of extraterrestrial environments, especially Mars.
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