Adaptive Strategies in a Poly-Extreme Environment: Differentiation of Vegetative Cells in Serratia ureilytica and Resistance to Extreme Conditions

Frontiers in Microbiology
Sevasti FilippidouPilar Junier

Abstract

Poly-extreme terrestrial habitats are often used as analogs to extra-terrestrial environments. Understanding the adaptive strategies allowing bacteria to thrive and survive under these conditions could help in our quest for extra-terrestrial planets suitable for life and understanding how life evolved in the harsh early earth conditions. A prime example of such a survival strategy is the modification of vegetative cells into resistant resting structures. These differentiated cells are often observed in response to harsh environmental conditions. The environmental strain (strain Lr5/4) belonging to Serratia ureilytica was isolated from a geothermal spring in Lirima, Atacama Desert, Chile. The Atacama Desert is the driest habitat on Earth and furthermore, due to its high altitude, it is exposed to an increased amount of UV radiation. The geothermal spring from which the strain was isolated is oligotrophic and the temperature of 54°C exceeds mesophilic conditions (15 to 45°C). Although the vegetative cells were tolerant to various environmental insults (desiccation, extreme pH, glycerol), a modified cell type was formed in response to nutrient deprivation, UV radiation and thermal shock. Scanning (SEM) and Transmission Electron Mi...Continue Reading

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Citations

Oct 19, 2019·The ISME Journal·Eva SpieckJennifer Hüpeden
Jul 30, 2019·Frontiers in Microbiology·Carolina F CubillosCristina Dorador
Jan 20, 2022·Archives of Microbiology·Atif Khurshid WaniJuliana Heloisa Pinê Américo-Pinheiro

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Datasets Mentioned

BETA
GM4R
PRJNA260750

Methods Mentioned

BETA
PCR
Assay
electron microscopy
Phase
Scanning electron microscopy
Transmission electron microscopy

Software Mentioned

BLASTX
EDGAR
Mafft
BLAST
PHYLIP
BLASTn
PhyML
DNAplotter
R package
GBLOCKS

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