Temporal dynamics of microbial transcription in wetted hyperarid desert soils

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dc.contributor.authorLeon-Sobrino, Carlos
dc.contributor.authorRamond, Jean-Baptiste
dc.contributor.authorCoclet, Clement
dc.contributor.authorKapitango, Ritha-Meriam
dc.contributor.authorMaggs-Kolling, Gillian
dc.contributor.authorCowan, Don A.
dc.date.accessioned2025-01-20T17:07:47Z
dc.date.available2025-01-20T17:07:47Z
dc.date.issued2024
dc.description.abstractRainfall is rare in hyperarid deserts but, when it occurs, it triggers large biological responses essential for the long-term maintenance of the ecosystem. In drylands, microbes play major roles in nutrient cycling, but their responses to short-lived opportunity windows are poorly understood. Due to its ephemeral nature, mRNA is ideally suited to study microbiome dynamics upon abrupt changes in the environment. We analyzed microbial community transcriptomes after simulated rainfall in a Namib Desert soil over 7 days. Using total mRNA from dry and watered plots we infer short-term functional responses in the microbiome. A rapid two-phase cycle of activation and return to basal state was completed in a short period. Motility systems activated immediately, whereas competition-toxicity increased in parallel to predator taxa and the drying of soils. Carbon fixation systems were downregulated, and reactivated upon return to a near-dry state. The chaperone HSP20 was markedly regulated by watering across all major bacteria, suggesting a particularly important role in adaptation to desiccated ecosystems. We show that transcriptomes provide consistent and high resolution information on microbiome processes in a low-biomass environment, revealing shared patterns across taxa. We propose a structured dispersal-predation dynamic as a central driver of desert microbial responses to rainfall.
dc.description.abstractStructured and rapid microbiome response to watering in a Namib Desert soil using metatranscriptomics.
dc.fuente.origenWOS
dc.identifier.doi10.1093/femsec/fiae009
dc.identifier.eissn1574-6941
dc.identifier.issn0168-6496
dc.identifier.urihttps://doi.org/10.1093/femsec/fiae009
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90894
dc.identifier.wosidWOS:001178255700002
dc.issue.numero3
dc.language.isoen
dc.revistaFems microbiology ecology
dc.rightsacceso restringido
dc.subject.ods13 Climate Action
dc.subject.ods02 Zero Hunger
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa02 Hambre cero
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleTemporal dynamics of microbial transcription in wetted hyperarid desert soils
dc.typeartículo
dc.volumen100
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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