DMC-ReaDy
Financiado
Dormant Microbial Communities Reactivation Dynamics in Lake Sediments
In aquatic sediments microorganisms are gradually buried by newly deposited layers and cut off from their main energy source, organic matter from overlying water or adjacent land. Yet, large populations of microorganisms are found...
In aquatic sediments microorganisms are gradually buried by newly deposited layers and cut off from their main energy source, organic matter from overlying water or adjacent land. Yet, large populations of microorganisms are found in buried sediments, living in a state of strongly reduced metabolic activity. The evolutionary advantages of survival in this dormancy-like state remain unclear and may be related to rare events where buried microorganisms are returned to energy-replete conditions after centuries or millennia of starvation.
The aim of this project is to observe how fast different sediment-inhabiting microbes are able to reactivate their metabolism and resume growth, and to determine the physiological changes and molecular mechanisms associated with the process. To initiate reactivation of starved microorganisms in a natural setting, deep layers of lake sediment will be transplanted to energy-rich surface sediments in diffusion chambers allowing nutrients to enter the chamber while preventing invasion of other microbes. Changes in gene expression of individual populations, combined with monitoring of cell size, shape, and biomass production will reveal molecular, physiological, and morphological responses involved in exiting starvation. The hypotheses on preferential substrate utilization and interdependencies between different populations derived from results of this in-situ experiment will be tested in controlled laboratory experiments, where targeted reactivation of selected community members will be triggered by addition of predicted preferred substrate.
The uncovered mechanisms of microbial starvation survival and reactivation will have implications for the carbon cycling performed by sediment microbial communities, an essential part of the global cycle of carbon sequestration and remineralization. With dormancy being wide-spread in the microbial world, the results will also be relevant for other areas of microbiology and environmental sciences.
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Duración del proyecto: 25 meses
Fecha Inicio: 2021-03-09
Fecha Fin: 2023-04-28
Fecha Fin: 2023-04-28
Línea de financiación: concedida
El organismo H2020 notifico la concesión del proyecto el día 2023-04-28
Línea de financiación objetivo
El proyecto se financió a través de la siguiente ayuda:
MSCA-IF-2020:
Individual Fellowships
Cerrada
hace 4 años
Presupuesto
El presupuesto total del proyecto asciende a
191K€
Líder del proyecto
EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH
No se ha especificado una descripción o un objeto social para esta compañía.
557.58K€ |
Participante