Avoidance of protein oxidation correlates with the desiccation and radiation resistance of hot and cold desert strains of the cyanobacterium Chroococcidiopsis

Fagliarone, Claudia; Mosca, Claudia; Ubaldi, Ilaria; Verseux, Cyprien; Baqué, Mickaël; Wilmotte, Annick; Billi, Daniela

doi:10.1007/s00792-017-0957-8

Cited by 51 publications

(57 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, strains with high resistance (up to 15%) to sodium chloride were found. It was previously shown that the same physiological mechanism provides resistance for both desiccation and salinization, which could explains the obtained result [77,78].…”

Section: Discussionsupporting

confidence: 62%

Stress-Tolerance and Taxonomy of Culturable Bacterial Communities Isolated from a Central Mojave Desert Soil Sample

et al. 2019

View full text Add to dashboard Cite

The arid Mojave Desert is one of the most significant terrestrial analogue objects for astrobiological research due to its genesis, mineralogy, and climate. However, the knowledge of culturable bacterial communities found in this extreme ecotope’s soil is yet insufficient. Therefore, our research has been aimed to fulfil this lack of knowledge and improve the understanding of functioning of edaphic bacterial communities of the Central Mojave Desert soil. We characterized aerobic heterotrophic soil bacterial communities of the central region of the Mojave Desert. A high total number of prokaryotic cells and a high proportion of culturable forms in the soil studied were observed. Prevalence of Actinobacteria, Proteobacteria, and Firmicutes was discovered. The dominance of pigmented strains in culturable communities and high proportion of thermotolerant and pH-tolerant bacteria were detected. Resistance to a number of salts, including the ones found in Martian regolith, as well as antibiotic resistance, were also estimated.

show abstract

Section: Discussionsupporting

confidence: 62%

Stress-Tolerance and Taxonomy of Culturable Bacterial Communities Isolated from a Central Mojave Desert Soil Sample

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The correlation between radiation and desiccation tolerance is also seen in the gram negative pathogenic bacterium, Acinetobacter radioresistans, which can reportedly tolerate gamma radiation as high as 25 kGy and desiccation stress as long as 157 days at 31% relative humidity [119]. Recently, a tight correlation is reported between desiccation, radiation tolerance, and avoidance of protein oxidation in desert strains of Chrococcidiopsis, where the protein oxidation damage was low when long term desiccated cells were exposed to H 2 O 2 or gamma radiation stress [161]. The radioresistance of these microbes may therefore to be incidental, that is, a consequence of acquired desiccation tolerance.…”

Section: Radiation and Desiccation Stress Responsementioning

confidence: 99%

Desiccation and radiation stress tolerance in cyanobacteria

Singh

2018

J Basic Microbiol

View full text Add to dashboard Cite

Cyanobacteria are among the oldest living organisms on this planet, existing since more than 3 billion years. They are ideal organisms for investigating biological processes such as photosynthesis, respiration, circadian rhythm, photoregulation of gene expression, developmental gene rearrangements, and specialized cell differentiation. They are nearly ubiquitous in distribution, have colonized a wide range of ecosystems including soil, air, dry rock, and aquatic systems, and even occupy extreme niches that are inaccessible to other organisms. Such wide ecological distribution reflects their capacity to acclimate to extreme environments. They show great adaptive abilities and have survived various adverse physiological growth conditions like desiccation, high temperatures, extreme pH, cold, osmosis, salt, light, nitrogen, and high salinity. Their ancient origin and surviving through numerous stresses during evolution indicates their remarkable capabilities to survive and prevail under different environmental and man-made stresses. It has been hypothesized that similar and overlap stress response mechanisms help them to survive different stresses. It has been stated that responses against stresses like radiation has been accidental-exhibited because of similar response against desiccation stress, which has prevailed more during evolution. These overlaps and similarities in stress responses have been instrumental in making these organisms a large class of biological entities today. Present review discuss about stress tolerance in cyanobacteria against two extreme stresses - desiccation and gamma radiation. It also discuss the commonality and underlying molecular mechanisms in these two stress responses.

show abstract

“…In nature they occur in extremely hot and cold deserts, considered the closest analogs of Mars , there forming hypolithic or endolithic biofilms at the soil-rock interface or inside porous rocks (Friedmann and Ocampo, 1976;Friedmann, 1980;Grilli Caiola and Billi, 2007). Under laboratory conditions, these desert cyanobacteria survive years of airdrying (Billi, 2009;Fagliarone et al, 2017) and, when irradiated in the dried state, can tolerate up to 24 kGy of gamma rays and 30 kJ/m 2 of Marslike UV flux (Cockell et al, 2005). These features make desert strains of Chroococcidiopsis ideal candidates for investigating life endurance under space and Mars-like conditions in LEO by using the ESA EXPOSE facility, a platform that allows passive exposure to space conditions of dried samples subsequently analyzed after retrieval back on Earth .…”

Section: Introductionmentioning

confidence: 99%

Dried Biofilms of Desert Strains of Chroococcidiopsis Survived Prolonged Exposure to Space and Mars-like Conditions in Low Earth Orbit

et al. 2019

Self Cite

View full text Add to dashboard Cite

Dried biofilms and dried multilayered planktonic counterparts obtained from three desert strains of Chroococcidiopsis were exposed to low Earth conditions by using the EXPOSE-R2 facility outside the International Space Station. During the space mission, samples in Tray 1 (space vacuum and solar radiation, from l & 110 nm) and Tray 2 (Mars-like UV flux, l > 200 nm and Mars-like atmosphere) received total UV (200-400 nm) fluences of about 4.58 · 10 2 kJ/m 2 and 4.92 · 10 2 kJ/m 2 , respectively, and 0.5 Gy of cosmic ionizing radiation. Postflight analyses were performed on 2.5-year-old samples due to the space mission duration, from launch to sample return to the lab. The occurrence of survivors was determined by evaluating cell division upon rehydration and damage to the genome and photosynthetic apparatus by polymerase chain reaction-stop assays and confocal laser scanning microscopy.Biofilms recovered better than their planktonic counterparts, accumulating less damage not only when exposed to UV radiation under space and Mars-like conditions but also when exposed in dark conditions to low Earth conditions and laboratory control conditions. This suggests that, despite the shielding provided by top-cell layers being sufficient for a certain degree of survival of the multilayered planktonic samples, the enhanced survival of biofilms was due to the presence of abundant extracellular polymeric substances and to additional features acquired upon drying.

show abstract

Avoidance of protein oxidation correlates with the desiccation and radiation resistance of hot and cold desert strains of the cyanobacterium Chroococcidiopsis

Cited by 51 publications

References 36 publications

Stress-Tolerance and Taxonomy of Culturable Bacterial Communities Isolated from a Central Mojave Desert Soil Sample

Stress-Tolerance and Taxonomy of Culturable Bacterial Communities Isolated from a Central Mojave Desert Soil Sample

Desiccation and radiation stress tolerance in cyanobacteria

Dried Biofilms of Desert Strains of Chroococcidiopsis Survived Prolonged Exposure to Space and Mars-like Conditions in Low Earth Orbit

Contact Info

Product

Resources

About