Related Experiment Videos
Bacteria produce the volatile hydrocarbon isoprene
J Kuzma1, M Nemecek-Marshall, W H Pollock
1Department of Chemistry and Biochemistry, University of Colorado, Boulder 80309-0215.
Current Microbiology
|February 1, 1995
Summary
Bacteria, including Bacillus species, produce the volatile hydrocarbon isoprene. Production is enhanced in rich media and during log-phase growth, with optimal temperatures around 45°C, suggesting an enzymatic pathway.
Area of Science:
- Microbiology
- Biochemistry
- Environmental Science
Background:
- Isoprene (2-methyl-1,3-butadiene) is a volatile hydrocarbon.
- Bacterial production of isoprene has been previously suggested but not extensively characterized.
Purpose of the Study:
- To investigate the production of isoprene by various bacterial species.
- To identify factors influencing bacterial isoprene production, such as media composition, growth phase, and temperature.
Main Methods:
- Culturing of diverse Gram-negative and Gram-positive bacteria.
- Quantification of isoprene using gas chromatography-mass spectrometry (GC-MS).
- Analysis of isoprene production under varying media conditions, growth phases, and temperatures.
Main Results:
- Multiple bacterial species were confirmed to produce isoprene.
- Bacillus species exhibited the highest isoprene production rates.
- Isoprene production was significantly higher in rich media compared to minimal media.
- Peak isoprene emission rates occurred during the logarithmic growth phase.
- Bacterial isoprene production showed an optimal temperature of 45°C.
Conclusions:
- Bacteria are a significant source of atmospheric isoprene.
- Bacterial isoprene production is influenced by nutrient availability and growth stage.
- The temperature-dependent profile suggests an enzymatic mechanism for isoprene biosynthesis in bacteria.