Data/hora: 12/06/2024 14:51:16

Provedor de dados: | 5
País: | France
Título: | Adaptative responses of E-coli to marine environmental stresses. a modelling approach based on viability and dormancy concepts
Autores: | Martin, Y; Troussellier, Marc; Bonnefont, Jl.
Data: | 1998-11
Ano: | 1998
Palavras-chave: | Escherichia coli; Eau de mer; Stress; États cellulaires; Modélisation; Escherichia coli; Seawater; Stress; Cellular states; Modelling.
Resumo: | In an attempt to synthesize conceptual and experimental information on the behaviour of enteric bacteria in seawater, a mathematical model has been developed. This model is based on changes in intracellular metabolisable components depending an physiological responses of the cell when subjected to nutrient starvation, salinity stress and solar radiation. Following a strategy which takes into account short- and mid-term physiological adaptation and reversal processes, the cells can develop in different states: culturable (B-1), viable and definitively nonculturable (B-2), and reversibly dormant (B-3) cells. Model parameters were deduced either from original microcosm experiments, from literature data or calibration procedures. Validation of the model was performed through specific data on the patterns of change in culturable cell abundances when Escherichia coli populations were subjected to separate or simultaneous experimental stresses. It was shown that model simulations fit these data satisfactorily. Simulation results clearly show the effectiveness of the antistress response and the importance of dormancy which confers higher resistance properties. The model also makes it possible to test the effect of the different stresses, and the role of pre-adaptation with regard to the dynamics of the different cellular states.
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00325/43646/43224.pdf

DOI:10.1016/S0399-1784(99)80018-8

http://archimer.ifremer.fr/doc/00325/43646/

Editor: | Gauthier-villars/editions Elsevier
Formato: | application/pdf
Fonte: | Oceanologica Acta (0399-1784) (Gauthier-villars/editions Elsevier), 1998-11 , Vol. 21 , N. 6 , P. 951-964

Fonte:

Elsevier, Paris

info:eu-repo/semantics/openAccess

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