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Flow cytofluorometric analysis of the nuclear division cycle of Physarum polycephalum plasmodia
Abstract:
The nuclear cycle kinetics of Physarum polycephalum plasmodia were examined using flow cytofluorometry. The dyes Hoechst 33342 and propidium iodide were used to stain the DNA of isolated nuclei. In asynchronously growing microplasmodia. S phase consists of 13--15% of the nuclear division cycle time. Nuclei isolated from individual macroplasmodia, which have previously been demonstrated to divide in synchrony, were shown to be less synchronized during late S phase than during mitosis. The results obtained demonstrate the feasibility of flow cytometric measurement of the properties of nuclei isolated from a single cell.
Insights
Flow cytometry effectively measures nuclear properties in Physarum polycephalum. This study quantines S phase duration and synchronization in the organism
Area of Science:
- Cell Biology
- Biophysics
Background:
- The nuclear cycle of Physarum polycephalum is a model for eukaryotic cell division.
- Understanding nuclear cycle kinetics is crucial for cell biology research.
Purpose of the Study:
- To investigate the nuclear cycle kinetics of Physarum polycephalum plasmodia.
- To assess the feasibility of using flow cytometry for analyzing single-cell nuclei properties.
Main Methods:
- Utilized flow cytofluorometry to analyze isolated nuclei.
- Employed Hoechst 33342 and propidium iodide DNA staining.
- Examined asynchronously growing microplasmodia and synchronized macroplasmodia.
Main Results:
- S phase constitutes 13-15% of the nuclear division cycle time.
- Nuclei from synchronized macroplasmodia showed less synchrony in late S phase compared to mitosis.
- Demonstrated the feasibility of flow cytometric analysis of single-cell nuclei.
Conclusions:
- Flow cytometry is a viable method for studying nuclear properties in Physarum polycephalum.
- Nuclear cycle dynamics, including S phase duration and synchrony, can be quantitatively assessed.