Increased biofilm formation due to high-temperature adaptation in marine Roseobacter.
Alyssa G KentCatherine A GarciaAdam C MartinyPublished in: Nature microbiology (2018)
Ocean temperatures will increase significantly over the next 100 years due to global climate change1. As temperatures increase beyond current ranges, it is unclear how adaptation will impact the distribution and ecological role of marine microorganisms2. To address this major unknown, we imposed a stressful high-temperature regime for 500 generations on a strain from the abundant marine Roseobacter clade. High-temperature-adapted isolates significantly improved their fitness but also increased biofilm formation at the air-liquid interface. Furthermore, this altered lifestyle was coupled with genomic changes linked to biofilm formation in individual isolates, and was also dominant in evolved populations. We hypothesize that the increasing biofilm formation was driven by lower oxygen availability at elevated temperature, and we observe a relative fitness increase at lower oxygen. The response is uniquely different from that of Escherichia coli adapted to high temperature3 (only 3% of mutated genes were shared in both studies). Thus, future increased temperatures could have a direct effect on organismal physiology and an indirect effect via a decrease in ocean oxygen solubility, leading to an alteration in microbial lifestyle.
Keyphrases
- biofilm formation
- high temperature
- escherichia coli
- pseudomonas aeruginosa
- staphylococcus aureus
- climate change
- candida albicans
- physical activity
- metabolic syndrome
- body composition
- cardiovascular disease
- genetic diversity
- weight loss
- cystic fibrosis
- genome wide
- klebsiella pneumoniae
- risk assessment
- current status
- multidrug resistant
- genome wide analysis