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Source-Dependent Structuring of Hydrogen-Oxidising Bacterial Community Composition During Enrichment and Isolation
Emine Gozde Ozbayram1, Marcell Nikolausz2
1Department of Marine and Freshwater Resources Management, Faculty of Aquatic Sciences, Istanbul University, 34134 Istanbul, Türkiye.
Microorganisms
|June 26, 2026
Summary
Researchers explored hydrogen-oxidising bacteria (HOB) from freshwater environments for microbial protein. They identified shifts in bacterial communities and potential new HOB contributors, like Acinetobacter and Klebsiella.
Area of Science:
- Microbiology
- Environmental Science
- Biotechnology
Background:
- Hydrogen-oxidising bacteria (HOB) are crucial for microbial protein production.
- Understanding the influence of environmental sources on HOB diversity is key for optimizing cultivation strategies.
Purpose of the Study:
- To cultivate and isolate hydrogen-oxidising bacteria (HOB) for microbial protein production.
- To assess the impact of different environmental sources on HOB enrichment culture and strain diversity.
Main Methods:
- Enrichment of HOB from freshwater lake and stream samples.
- Isolation of novel HOB strains.
- Analysis of microbial community composition shifts.
Main Results:
- Significant shifts in bacterial community composition were observed, driven by Pseudomonadota and Bacteroidota.
- Sample-specific variations in microbial communities reflected distinct ecological functions.
- Common HOB genus *Hydrogenophaga* proliferated, alongside potentially novel contributors like *Acinetobacter* and *Klebsiella*.
Conclusions:
- Environmental sources significantly influence HOB enrichment culture and strain diversity.
- Novel genera, previously unrecognized for hydrogen-oxidation, were enriched, expanding the known HOB community.
- Findings support the potential for diverse HOB for microbial protein applications.
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