Unique morphogenesis in Saccharomyces cerevisiae strain GS1731

Area of Science:

• Cell biology
• Microbiology
• Yeast genetics

Background:

• Budding is a primary mode of cell division in Saccharomyces cerevisiae.
• Understanding the regulation of budding is crucial for cell cycle studies.

Purpose of the Study:

• To investigate the phenomenon of multiple budding in Saccharomyces cerevisiae.
• To characterize the cellular structures and processes involved in multiple budding.

Main Methods:

• Light and scanning electron microscopy to visualize bud formation.
• Immunofluorescence microscopy to study microtubule organization.
• DAPI staining to analyze nuclear content.
• Hydroxyurea treatment to induce synchronized growth.

Main Results:

• 50-60% of budded cells showed multiple buds during early growth phases.
• Mother cells could initiate up to three simultaneous bud developments.
• Multiple buds could develop concurrently or sequentially.
• Multiply budded cells exhibited multiple cytoplasmic microtubule bundles.
• Some unbudded mother cells were multinucleate and underwent normal cytokinesis.

Conclusions:

• Saccharomyces cerevisiae exhibits a capacity for multiple simultaneous bud formation.
• This process is associated with multiple microtubule organizing centers and nuclear division.
• The frequency of multiple budding varies with growth phase.