Related Experiment Videos
Polyphosphate production by strains of Acinetobacter
G Vasiliadis1, A Duncan, R C Bayly
1Department of Microbiology, Monash University, Clayton, Victoria, Australia.
FEMS Microbiology Letters
|June 15, 1990
Summary
Two Acinetobacter strains showed high polyphosphate accumulation, but their variants did not. Enzyme levels did not correlate with polyphosphate content in these biological phosphate removal bacteria.
Area of Science:
- Microbiology
- Environmental Science
- Biochemistry
Background:
- Enhanced biological phosphate removal is crucial for wastewater treatment.
- Acinetobacter species are known for their role in nutrient cycling and potential in bioremediation.
- Polyphosphate accumulation in bacteria is a key mechanism for biological phosphate removal.
Purpose of the Study:
- To investigate polyphosphate accumulation in Acinetobacter strains isolated from a biological phosphate removal pilot plant.
- To characterize polyphosphate levels in different strains and their variants.
- To explore potential correlations between polyphosphate content and specific enzyme activities.
Main Methods:
- Isolation and culturing of Acinetobacter strains from a pilot plant.
- Quantification of intracellular polyphosphate levels in bacterial strains.
- Analysis of enzyme levels implicated in polyphosphate metabolism.
- Comparison of polyphosphate accumulation in parent strains and their isolated variants.
Main Results:
- Two Acinetobacter strains (RA3116 and RA3117) exhibited significantly higher polyphosphate accumulation (>10x) compared to two other strains (RA3114 and RA3123).
- Variants derived from the high-accumulating strains (RA3116, RA3117) demonstrated reduced polyphosphate levels, similar to the low-accumulating strains.
- No significant correlation was observed between the polyphosphate content of the strains and the activity of key enzymes involved in polyphosphate formation.
Conclusions:
- Bacterial strains with high polyphosphate accumulation capabilities were identified for enhanced biological phosphate removal.
- The high polyphosphate phenotype in certain Acinetobacter strains may be unstable or influenced by factors not directly related to the measured enzyme activities.
- Further research is needed to elucidate the genetic and metabolic factors governing polyphosphate accumulation in Acinetobacter for optimizing wastewater treatment processes.