Air-drying kinetics affect yeast membrane organization and survival.

Guillaume Lemetais 1 Sébastien Dupont 2 Laurent Beney 2 Patrick Gervais 2, *
* Auteur correspondant
2 PMB - Procédés Microbiologiques et Biotechnologiques
PAM - Procédés Alimentaires et Microbiologiques, PAM - Procédés Alimentaires et Microbiologiques [Dijon]
Abstract : The plasma membrane (PM) is a key structure for the survival of cells during dehydration. In this study, we focused on the concomitant changes in survival and in the lateral organization of the PM in yeast strains during desiccation, a natural or technological environmental perturbation that involves transition from a liquid to a solid medium. To evaluate the role of the PM in survival during air-drying, a wild-type yeast strain and an osmotically fragile mutant (erg6Δ) were used. The lateral organization of the PM (microdomain distribution) was observed using a fluorescent marker related to a specific green fluorescent protein-labeled membrane protein (Sur7-GFP) after progressive or rapid desiccation. We also evaluated yeast behavior during a model dehydration experiment performed in liquid medium (osmotic stress). For both strains, we observed similar behavior after osmotic and desiccation stresses. In particular, the same lethal magnitude of dehydration and the same lethal kinetic effect were found for both dehydration methods. Thus, yeast survival after progressive air-drying was related to PM reorganization, suggesting the positive contribution of passive lateral rearrangements of the membrane components. This study also showed that the use of glycerol solutions is an efficient means to simulate air-drying desiccation.
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Contributeur : Sébastien Dupont <>
Soumis le : vendredi 18 mai 2012 - 10:30:11
Dernière modification le : jeudi 19 septembre 2019 - 13:58:28

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Guillaume Lemetais, Sébastien Dupont, Laurent Beney, Patrick Gervais. Air-drying kinetics affect yeast membrane organization and survival.. Applied Microbiology and Biotechnology, Springer Verlag, 2012, 96 (2), pp.471-481. ⟨10.1007/s00253-012-4014-3⟩. ⟨hal-00698901⟩

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