AI Article Synopsis
- Deep-sea hydrothermal vents, traditionally known for their chemosynthetic ecosystems, also potentially support phototrophic populations due to emitted light that may drive photosynthesis.
- Metagenomic analyses of samples from the Southwest Indian Ridge revealed widespread distribution of phototrophic bacteria, including known chlorophototrophs, and highlighted the presence of complete chlorophyll biosynthetic pathways.
- The findings suggest that geothermal vent light could provide energy that enhances the competitive advantage of phototrophs, supporting the idea of the ocean as a diverse microorganism seed bank.
Article Abstract
Unlabelled: Deep-sea hydrothermal vents are known as chemosynthetic ecosystems. However, high temperature vents emit light that hypothetically can drive photosynthesis in this habitat. Metagenomic studies have sporadically reported the occurrence of phototrophic populations such as cyanobacteria in hydrothermal vents. To determine how geographically and taxonomically widespread phototrophs are in deep-sea hydrothermal vents, we collected samples from three niches in a hydrothermal vent on the Southwest Indian Ridge and carried out an integrated metagenomic analysis. We determined the typical community structures of microorganisms found in active venting fields and identified populations of known potential chlorophototrophs and retinalophototrophs. Complete chlorophyll biosynthetic pathways were identified in all samples. By contrast, proteorhodopsins were only found in active beehive smoker diffusers. Taxonomic groups possessing potential phototrophy dependent on semiconductors present in hydrothermal vents were also found in these samples. This systematic comparative metagenomic study reveals the widespread distribution of phototrophic bacteria in hydrothermal vent fields. Our results support the hypothesis that the ocean is a seed bank of diverse microorganisms. Geothermal vent light may provide energy and confer a competitive advantage on phototrophs to proliferate in hydrothermal vent ecosystems.
Supplementary Information: The online version contains supplementary material available at 10.1007/s42995-021-00121-y.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10077154 | PMC |
| http://dx.doi.org/10.1007/s42995-021-00121-y | DOI Listing |
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