Related Experiment Videos
Factors affecting the morphogenetic switch in Yarrowia lipolytica
1Departamento de Microbiologia y Genética, Instituto de Microbiologia Bioquimica/CSIC, Universidad de Salamanca, 37071, Salamanca, Spain.
Current Microbiology
|October 31, 2001
Summary
Researchers developed a method to induce a consistent yeast-to-hypha transition in Yarrowia lipolytica by synchronizing cells and using specific carbon sources like N-acetylglucosamine or serum. This finding suggests multiple signaling pathways regulate this dimorphic switch.
Area of Science:
- Microbiology
- Cell Biology
- Biochemistry
Background:
- Yarrowia lipolytica is a dimorphic yeast commonly found in dairy products.
- Understanding the yeast-hypha transition is crucial for studying fungal morphology and pathogenicity.
Purpose of the Study:
- To describe methods for inducing a homogeneous yeast-hypha transition in Yarrowia lipolytica liquid cultures.
- To investigate the role of carbon sources and cell cycle synchronization in Y. lipolytica morphogenesis.
Main Methods:
- Cell synchronization in G1 phase via nitrogen starvation.
- Induction of yeast-hypha transition using N-acetylglucosamine (GlcNAc), serum, or bovine albumin as sole carbon sources.
- Assessment of morphogenetic switch under different conditions, including glucose addition and solid medium.
Main Results:
- Over 90% of Y. lipolytica cells formed hyphae within 4-6 hours when incubated with GlcNAc or serum.
- Glucose addition arrested the switch with GlcNAc but not with serum.
- Serum also induced invasive growth on solid medium, while pH, nitrogen starvation, and temperature had minor roles.
Conclusions:
- Established a reliable method for inducing dimorphic transition in Y. lipolytica.
- Identified specific carbon sources that trigger hyphal formation.
- Results suggest the existence of at least two distinct morphogenetic signaling pathways in Y. lipolytica, similar to Candida albicans.