Eco-evolutionary Dynamics Linked to Horizontal Gene Transfer in Vibrios

Area of Science:

• Microbiology
• Ecology
• Genomics

Background:

• Vibrio are ubiquitous heterotrophic bacteria in aquatic environments, playing roles in biogeochemical processes and substance degradation.
• They exist in various states: free-living, particle-attached, or associated with other organisms (mutualistic, commensal, pathogenic).
• Vibrio populations can dominate during blooms despite being a small fraction of total bacteria.

Purpose of the Study:

• To review the ecology of Vibrio bacteria.
• To examine the role of genome plasticity and horizontal gene transfer (HGT) in Vibrio adaptation and pathogen emergence.
• To synthesize findings from genomic, molecular, and ecological studies.

Main Methods:

• Review of existing literature on Vibrio ecology and genomics.
• Analysis of genomic studies comparing environmental and pathogenic Vibrio strains.
• Examination of mobile genetic elements encoding virulence factors.
• Discussion of mechanistic studies on horizontal gene transfer (HGT) modes.

Main Results:

• Genome plasticity, significantly influenced by HGT, enables Vibrio to adapt to diverse ecological niches.
• Horizontal gene transfer (HGT) is a key driver in the emergence of pathogenic Vibrio strains.
• Genomic data reveal mobile genetic elements carrying virulence factors that contribute to Vibrio pathogenicity.

Conclusions:

• Vibrio's ecological adaptability is strongly linked to their genome plasticity, facilitated by horizontal gene transfer (HGT).
• Understanding HGT mechanisms is crucial for predicting and managing the emergence of Vibrio-related diseases.
• The interplay between Vibrio ecology and horizontal gene transfer (HGT) shapes their evolutionary trajectory and pathogenic potential.