Cryptic arsenic cycling controls oxygenic photosynthesis in Precambrian-analog microbial mats
A. Castillejos Sepulveda, D. R. Speth, C. Kerl, D. Doherty-Weason, F. A. Vignale, K. Santha, A. Chennu, W. Mohr, E. Merz, D. de Beer, M. E. Farias, J. Klatt
The paper shows cyanobacteria in microbial mats switch from oxygenic to arsenite-driven anoxygenic photosynthesis under high light, revealing a cryptic arsenic redox cycle that may have influenced early Earth oxygenation.
bioRxiv · Apr 27, 2024 · PreprintMicrobiology