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Updated: Mar 29, 2026

Light-Controlled Fermentations for Microbial Chemical and Protein Production
Published on: March 22, 2022
Ultraviolet Technologies for Yeast Control and Functional Modulation in the Food Industry: Mechanisms, Resistance and
Agustín Zavala1, Oscar Cavieres1, Mariela Labbé1
1Laboratorio de Fermentaciones Industriales (IFELAB), Escuela de Alimentos, Facultad de Ciencias Agronómicas y de los Alimentos, Pontificia Universidad Católica de Valparaíso, Av. Waddington 716, Valparaíso 2360100, Chile.
Ultraviolet (UV) light can control or alter yeast behavior in food fermentation. Controlled UV exposure may enhance yeast functionality without genetic modification, offering new processing opportunities.
Area of Science:
- Food Microbiology
- Biotechnology
- Food Processing
Background:
- Yeasts are crucial for food fermentation, impacting quality and efficiency.
- Controlling yeast behavior is challenging, especially with non-thermal methods.
- Ultraviolet (UV) technology is used for microbial control but also affects yeast physiology.
Purpose of the Study:
- To review yeast-UV interactions in food matrices.
- To explore how UV treatments influence yeast physiology and functionality.
- To discuss UV's potential for yeast functional modulation.
Main Methods:
- Literature review of yeast-UV interactions.
- Analysis of UV effects on yeast viability, stress response, and DNA repair.
- Examination of UV-induced phenotypic changes and genetic alterations.
Main Results:
- UV exposure can inactivate, reduce viability, or induce stable phenotypic changes in yeasts.
- UV treatments impact yeast physiology, stress responses, and Deoxyribonucleic Acid (DNA) processing.
- Controlled UV can lead to yeast diversification and functional modulation.
Conclusions:
- UV technology offers a dual role in yeast management: control and functional enhancement.
- UV-induced genetic alterations present opportunities for yeast modulation without genetic modification.
- Further research is needed to optimize UV applications in food processing.
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