Pseudohyphal variations of yeasts exposed to specific space flight parameters

Area of Science:

• Microbiology
• Space Biology
• Yeast Genetics

Background:

• Understanding yeast responses to spaceflight is crucial for astrobiology and potential extraterrestrial life.
• Phenotypic plasticity in microorganisms can be influenced by environmental stressors.

Purpose of the Study:

• To investigate the impact of spaceflight parameters and UV radiation on yeast morphology.
• To quantify variations in pseudohyphal formation in Saccharomyces cerevisiae and Rhodotorula rubra.

Main Methods:

• Exposure of yeast cultures to simulated spaceflight conditions.
• Controlled UV light treatments with varying wavelengths and energy levels.
• Quantitative and qualitative assessment of pseudohyphal formation.

Main Results:

• Significant variations in pseudohyphal formation were observed in both yeast species.
• UV light exposure modulated the length of parent and branch pseudohyphal filaments.
• Differences were noted when comparing space-flown or UV-exposed isolates to ground controls.

Conclusions:

• Spaceflight and specific UV light conditions induce phenotypic changes in yeast.
• UV light characteristics directly influence the extent of pseudohyphal development.
• These findings contribute to understanding microbial adaptation in extraterrestrial environments.