Algal Betaine Triggers Bacterial Hydrogen Peroxide Production that Promotes Algal Demise
Narvaez-Barragan, D. A.; Yuda, L.; Lipsman, V.; Yahalomi, D.; Malitsky, S.; Segev, E.
Show abstract
Hydrogen peroxide (H2O2) plays various roles in the ocean, acting as a signaling molecule at low concentrations and causing oxidative stress when accumulated. While many marine microbes produce H2O2, its role in microbial interactions remains unclear. Here, we used transcriptomics, genetics, and metabolomics to study H2O2 dynamics in the interaction between Emiliania huxleyi algae and Phaeobacter inhibens bacteria. We found that H2O2 levels rise during algal death and that bacterial H2O2 production triggers this demise. Manipulating H2O2 levels shifted the outcome of the interaction. We also uncovered a link between H2O2 and betaine metabolism: aging algae release betaine, which promotes bacterial H2O2 production and, in turn, accelerates algal death. Genes involved in H2O2 and betaine metabolism were upregulated in environmental samples from an algal bloom. Together, our findings identify H2O2 and betaine as key molecules that modulate algal-bacterial interactions, potentially impacting microbial dynamics in marine ecosystems.
Matching journals
The top 3 journals account for 50% of the predicted probability mass.
Similar papers in this journal
Similar papers in this journal
- Diurnal cycles drive rhythmic physiology and promote survival in facultative phototrophic bacteria 95%
- Recoding enhances the metabolic capabilities of two novel methylotrophic Asgardarchaeota lineages 94%
- B12-dependent virioplankton demonstrate interseasonal dynamics and associate with a diversity of pelagic bacterioplankton 94%
Similar papers in this journal
- The potential for polyphosphate metabolism in Archaea and anaerobic polyphosphate formation in Methanosarcina mazei. 96%
- Adaptations of endolithic communities to abrupt environmental changes in a hyper-arid desert 95%
- Engineering lithoheterotrophy in an obligate chemolithoautotrophic Fe(II) oxidizing bacterium 95%
Similar papers in this journal
- Metabolic exchange and energetic coupling between nutritionally stressed bacterial species, the possible role of QS molecules 96%
- Syntrophy via interspecies H2 transfer between Christensenella and Methanobrevibacter underlies their global co-occurrence in the human gut 95%
- Quorum sensing mediates morphology and motility transitions in the model archaeon Haloferax volcanii 95%
Similar papers in this journal
"Similar papers" are the closest papers from that journal in the model's embedding space. They show what the match is built on, but the ranking comes mostly from a classifier over the whole training set, not from these examples alone.