The Influence of Microgravity on Invasive Growth in Saccharomyces cerevisiae

• This study investigates the effects of microgravity on colony growth and the morphological transition from single cells to short invasive filaments in the model eukaryotic organism Saccharomyces cerevisiae. Two-dimensional spreading of the yeast colonies grown on semi-solid agar medium was reduced under microgravity in the Sigma 1278b laboratory strain but not in the CMBSESA1 industrial strain. This was supported by the Sigma 1278b proteome map under microgravity conditions, which revealed upregulation of proteins linked to anaerobic conditions. The Sigma 1278b strain showed a reduced invasive growth in the center of the yeast colony. Bud scar distribution was slightly affected, with a switch toward more random budding. Together, microgravity conditions disturb spatially programmed budding patterns and generate strain-dependent growth differences in yeast colonies on semi-solid medium.

Subject headings

NATURVETENSKAP  -- Biologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Keyword

yeast

Adhesion

shear modeled microgravity

escherichia-coli

international-space-station

candida-albicans

Budding

Microgravity

Invasive growth

cell-cell

immune-system

biofilm formation

Saccharomyces cerevisiae

stress-response

Proteomics

gene-expression

Publication and Content Type

art (subject category)

ref (subject category)