Related Experiment Videos
Interaction between Saccharomyces cerevisiae and chrysotile
F Cassiola1, M Silveira, S Jericó
1Department of Physical Chemistry, Instituto de Química, Universidade de Campinas, Caixa Postal 6154-13083-970, Campinas, SP, Brazil.
European Cells & Materials
|October 17, 2003
Summary
Saccharomyces cerevisiae yeast cells strongly adhere to chrysotile fibers, forming a protective layer. These yeast cells maintain metabolic activity and fermentation capabilities even after a year, demonstrating resilience.
Area of Science:
- Microbiology
- Materials Science
- Biotechnology
Background:
- Investigating the interaction between biological organisms and mineral fibers is crucial for understanding cellular responses and potential applications.
- Chrysotile asbestos, a mineral fiber, presents unique surface properties that can influence biological interactions.
- Saccharomyces cerevisiae, a widely studied yeast, serves as a model organism for exploring cellular adhesion and behavior.
Purpose of the Study:
- To investigate the interaction between Saccharomyces cerevisiae and chrysotile fibers using advanced microscopy.
- To determine how yeast cells adhere to chrysotile fibrils and the structural consequences of this interaction.
- To assess the metabolic activity and fermentation capacity of yeast cells after prolonged interaction with chrysotile.
Main Methods:
- Scanning electron microscopy (SEM) was employed to visualize the interaction between yeast cells and chrysotile fibers.
- Quantitative analysis of cell adhesion, fibril breakage, and entrapment was performed.
- Metabolic activity and fermentation potential of yeast cells were evaluated over time.
Main Results:
- Yeast cells exhibited preferential adhesion to chrysotile fibrils, with some cases showing complete surface coverage due to fibril breakage.
- Chrysotile-covered yeast cells displayed reduced budding but retained significant metabolic functions.
- Adhesion and entrapment were dependent on contact time and the adhesion medium, with longer contact enhancing interaction.
- Cells adhered in water showed increased entrapment over time, while those in nutrient media had lower entrapment but higher growth.
Conclusions:
- Saccharomyces cerevisiae demonstrates a strong affinity for chrysotile fibers, leading to significant cellular interaction and potential structural changes.
- Despite physical interaction and altered morphology, yeast cells maintain viability and fermentation capabilities, suggesting robust cellular resilience.
- The nature of the adhesion medium and contact duration critically influence the degree of yeast-chrysotile interaction, impacting entrapment and growth patterns.