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Generation and Isolation of Cell Cycle-arrested Cells with Complex Karyotypes
Published on: April 13, 2018
G1-phase arrest is not a prerequisite for encystment in Physarum
R W Anderson1, J Dee, J L Foxon
1Department of Molecular Biology and Biotechnology, University of Sheffield, United Kingdom. r.anderson@sheffield.ac.uk
Experimental Cell Research
|November 5, 1997
Summary
Physarum polycephalum amoebae encyst without a lengthy G1 phase. Flow cytometry revealed cells predominantly remain in G2 phase during growth and encystment, challenging prior assumptions.
Area of Science:
- Cell Biology
- Mycology
- Developmental Biology
Background:
- The slime mold *Physarum polycephalum* forms resistant cysts upon nutrient depletion.
- Vegetative amoebae typically lack a G1 phase, with most cells in G2.
- Previous studies suggested an obligatory 24-hour G1 phase precedes encystment.
Purpose of the Study:
- To investigate the cell cycle dynamics during encystment in *Physarum polycephalum*.
- To determine if a prolonged G1 phase is a prerequisite for cyst formation.
Main Methods:
- Utilized flow cytometry to analyze DNA content distribution.
- Monitored cell cycle phases during vegetative growth and induced encystment.
Main Results:
- *Physarum polycephalum* cultures predominantly exhibited cells in the G2 phase.
- A very low percentage of cells displayed G1 DNA content throughout the experiment.
- No extended G1 phase was detected preceding encystment.
Conclusions:
- An obligatory 24-hour G1 phase is not required for encystment in *Physarum polycephalum*.
- The vegetative cell cycle and encystment process primarily occur within the G2 phase.
