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[Age changes in cells in Streptococcus diacetilactis cultures]
Mikrobiologiia
|July 1, 1976
Summary
Metabolism in Streptococcus diacetilactis cultures declines with aging, marked by reduced cell viability and altered metabolic products. Cell disintegration begins after 72 hours, leading to complete breakdown by 120 hours.
Area of Science:
- Microbiology
- Cell Biology
- Biochemistry
Context:
- Investigating the metabolic activity and cellular integrity of Streptococcus diacetilactis, strain Bogdan, over time.
- Observing changes in bacterial cultures as they age, focusing on physiological and structural alterations.
Purpose:
- To characterize the metabolic shifts and cellular degradation processes in aging Streptococcus diacetilactis cultures.
- To document the morphological changes and loss of metabolic functions in Streptococcus diacetilactis with prolonged incubation.
Summary:
- Metabolic activity in Streptococcus diacetilactis cultures significantly decreases with aging.
- Key metabolic functions, including oxygen evolution, C-4 compound production, and pH response, are impaired.
- Cellular integrity is compromised, with disintegration observed starting at 72 hours and complete breakdown by 120 hours, involving mesosome loss, decreased electron density, cell wall decomposition, and cytoplasmic membrane rupture.
Impact:
- Provides insights into the aging process of Streptococcus diacetilactis at both metabolic and cellular levels.
- Contributes to understanding bacterial senescence and the mechanisms of cell death in microbial cultures.
- Highlights the temporal changes in bacterial physiology relevant to food fermentation and microbial ecology.