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[Periodic, metabolic and structural phenomena in a protist, Euglena gracilis]
The Journal of Protozoology
|November 1, 1979
Summary
Synchronous cell division in Euglena gracilis is achievable using lactate medium, independent of light. Macromolecule synthesis and organelle structure show cyclic variations throughout the cell cycle.
Area of Science:
- Cell Biology
- Microbiology
Context:
- Euglena gracilis strain Z exhibits synchronous cell division under specific culture conditions.
- Lactate as a sole carbon source induces synchronous divisions irrespective of illumination.
- Cell division phase is influenced by light-dark cycles.
Purpose:
- To investigate the molecular and structural events during the cell cycle of Euglena gracilis.
- To understand the regulation of macromolecule synthesis and organelle dynamics.
Summary:
- Macromolecule synthesis, including DNA and RNA, is discontinuous during the cell cycle.
- Cyclic structural variations occur in mitochondria and chloroplasts.
- Sequential metabolic processes and organelle modifications accompany cell cycle progression.
- Ribosome and RNA synthesis precedes organelle enlargement and DNA replication.
- Organelle division, starting with chondriome and plastids, occurs at the end of G1 phase.
Impact:
- Provides insights into the intricate regulation of cell division in eukaryotes.
- Highlights the interplay between metabolic processes, organelle dynamics, and cell cycle progression.
- Contributes to understanding fundamental biological processes in model organisms like Euglena.