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Biotechnological applications of biofilms formed by osmotolerant and halotolerant yeasts

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Abstract

Many microorganisms are capable of developing biofilms under adverse conditions usually related to nutrient limitation. They are complex structures in which cells (in many cases of different species) are embedded in the material that they secrete, the extracellular matrix (ECM), which is composed of proteins, carbohydrates, lipids, and nucleic acids. The ECM has several functions including adhesion, cellular communication, nutrient distribution, and increased community resistance, this being the main drawback when these microorganisms are pathogenic. However, these structures have also proven useful in many biotechnological applications. Until now, the most interest shown in these regards has focused on bacterial biofilms, and the literature describing yeast biofilms is scarce, except for pathological strains. Oceans and other saline reservoirs are full of microorganisms adapted to extreme conditions, and the discovery and knowledge of their properties can be very interesting to explore new uses. Halotolerant and osmotolerant biofilm-forming yeasts have been employed for many years in the food and wine industry, with very few applications in other areas. The experience gained in bioremediation, food production and biocatalysis with bacterial biofilms can be inspiring to find new uses for halotolerant yeast biofilms. In this review, we focus on the biofilms formed by halotolerant and osmotolerant yeasts such as those belonging to Candida, Saccharomyces flor yeasts, Schwannyomyces or Debaryomyces, and their actual or potential biotechnological applications.

Key points

• Biofilm formation by halotolerant and osmotolerant yeasts is reviewed.

• Yeasts biofilms have been widely used in food and wine production.

• The use of bacterial biofilms in bioremediation can be expanded to halotolerant yeast counterparts.

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Funding

This work was supported by the Universitat de València (UV-INV-AE-1560151).

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CA and MDO designed and wrote the manuscript. Both authors approved the manuscript.

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Correspondence to Marcel·lí del Olmo.

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This article does not contain any studies conducted with animals performed by any of the authors.

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The authors declare no competing interests.

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Andreu, C., del Olmo, M. Biotechnological applications of biofilms formed by osmotolerant and halotolerant yeasts. Appl Microbiol Biotechnol 107, 4409–4427 (2023). https://doi.org/10.1007/s00253-023-12589-y

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  • DOI: https://doi.org/10.1007/s00253-023-12589-y

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