Effect of some aldoses on growth of Saccharomyces cerevisiae inhibited with molybdenum

Area of Science:

• Microbiology
• Biochemistry

Background:

• Molybdenum is an essential trace element for many organisms, but its effects on yeast growth can be inhibitory.
• Aldoses are simple sugars that may interact with metal ions, potentially modifying their biological activity.

Purpose of the Study:

• To investigate the inhibitory effect of molybdenum ions on yeast growth at a specific pH.
• To determine the influence of various aldoses on molybdenum's inhibitory effect.
• To observe morphological changes in yeast cells exposed to molybdenum.

Main Methods:

• Yeast cultures were grown at pH 5.5.
• The inhibitory effect of molybdenum ions was assessed in the presence of different aldoses.
• Yeast cell morphology was examined under varying molybdenum concentrations.

Main Results:

• The inhibitory effect of molybdenum ions on yeast growth was reduced by aldoses in a specific order: D-talose > L-mannose > L-ribose > D-lyxose > L-galactose > L-arabinose > L-glucose > L-xylose.
• Increased molybdenum concentrations led to significant morphological changes in yeast cells.
• Affected yeast cells were smaller, exhibited thicker cell walls, and tended to form clusters.

Conclusions:

• Aldoses can mitigate the inhibitory effects of molybdenum ions on yeast growth.
• Molybdenum ions induce distinct morphological alterations in yeast cells, suggesting a role in cell structure and division.