Carotenoids dispersed in gypsum rock as a result of algae adaptation to the extreme conditions of the Atacama Desert.
Astrobiology
Biomarkers
Extremophiles
Geomicrobiology
Photopigments
Raman imaging
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
13 Oct 2024
13 Oct 2024
Historique:
received:
20
06
2024
accepted:
07
10
2024
medline:
14
10
2024
pubmed:
14
10
2024
entrez:
13
10
2024
Statut:
epublish
Résumé
The high-altitude pre-Andean region of the Atacama Desert is characterized by its stark volcanic rock formations and unique hydrothermal gypsum outcrops (gypcrete) that it hosts. This study delves into the biomolecular composition of the endolithic phototrophic microbes that thrive within these gypcretes. Using advanced Raman spectroscopy techniques, including Raman imaging (complemented by microscopic and 3D microscopic observations), herein we unveil new insights into the adaptive strategies of these gypsum-inhabiting algae. Our Raman imaging results provide a detailed chemical map of carotenoids associated with microbial colonization. This map reveals a significant gradient in pigment content, highlighting a critical survival mechanism for algae and cyanobacteria in this polyextreme environment. Intriguingly, we detected signals for carotenoids not only in the algae-colonized layer, but also deeper within the gypsum matrix - indicating pigment migration following cell disruption. In addition, we conducted an in-depth analysis of individual algal cells from the Trebouxiaceae family, noting their color variations from green to orange, plus describing the spectral differences in detail. This investigation identified in-vivo pigments (carotenoids, chlorophyll) and lipids at the cellular level, offering a comprehensive view of the molecular adaptations enabling life in one of the Earth's most extreme habitats.
Identifiants
pubmed: 39397059
doi: 10.1038/s41598-024-75526-7
pii: 10.1038/s41598-024-75526-7
doi:
Substances chimiques
Calcium Sulfate
WAT0DDB505
Carotenoids
36-88-4
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
23939Subventions
Organisme : Grantová Agentura České Republiky
ID : 22-29315S
Organisme : Ministerstvo Školství, Mládeže a Tělovýchovy
ID : CZ.02.01.01/00/22_008/0004635
Organisme : MCIN/AEI/10.13039/501100011033/FEDER, UE
ID : PID2021-124362NB-I00
Organisme : MCIN/AEI/10.13039/501100011033/FEDER, UE
ID : PID2021-124362NB-I00
Organisme : MCIN/AEI/10.13039/501100011033/FEDER, UE
ID : PID2021-124362NB-I00
Organisme : MCIN/AEI/10.13039/501100011033/FEDER, UE
ID : PID2021-124362NB-I00
Informations de copyright
© 2024. The Author(s).
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