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Título

Prokaryotic and viral community of the sulfate‐rich crust from Peñahueca ephemeral lake, an astrobiology analogue

AutorMartin‐Cuadrado, Ana‐Belen; Senel, Ece; Martínez-García, Manuel; Cifuentes, Ana CSIC; Santos, Fernando; Almansa, Cristina; Moreno-Paz, Mercedes CSIC ORCID; Blanco, Yolanda; García-Villadangos, Miriam CSIC ORCID; García del Cura, M. Ángeles CSIC ORCID; Sanz-Montero, María Esther; Rodríguez-Aranda, Juan Pablo; Rosselló-Mora, Ramón CSIC ORCID; Antón, Josefa; Parro-García, Víctor CSIC ORCID
Fecha de publicaciónoct-2019
EditorJohn Wiley & Sons
CitaciónEnvironmental Microbiology 21(19): 3577-3600 (2019)
ResumenPeñahueca is an athalassohaline hypersaline inland ephemeral lake originated under semiarid conditions in the central Iberian Peninsula (Spain). Its chemical composition makes it extreme for microbial life as well as a terrestrial analogue of other planetary environments. To investigate the persistence of microbial life associated with sulfate‐rich crusts, we applied cultivation‐independent methods (optical and electron microscopy, 16S rRNA gene profiling and metagenomics) to describe the prokaryotic community and its associated viruses. The diversity for Bacteria was very low and was vastly dominated by endospore formers related to Pontibacillus marinus of the Firmicutes phylum. The archaeal assemblage was more diverse and included taxa related to those normally found in hypersaline environments. Several ‘metagenome assembled genomes’ were recovered, corresponding to new species of Pontibacillus, several species from the Halobacteria and one new member of the Nanohaloarchaeota. The viral assemblage, although composed of the morphotypes typical of high salt systems, showed little similarity to previously isolated/reconstructed halophages. Several putative prophages of Pontibacillus and haloarchaeal hosts were identified. Remarkably, the Peñahueca sulfate‐rich metagenome contained CRISPR‐associated proteins and repetitions which were over 10‐fold higher than in most hypersaline systems analysed so far.
Versión del editorhttps://doi.org/10.1111/1462-2920.14680
URIhttp://hdl.handle.net/10261/202751
DOI10.1111/1462-2920.14680
ISSN1462-2912
E-ISSN1462-2920
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