Methanogenesis in the presence of oxygenic photosynthetic bacteria may contribute to global methane cycle.

ABSTRACT: Accumulating evidences are challenging the paradigm that methane in surface water primarily stems from the anaerobic transformation of organic matters. Yet, the contribution of oxygenic photosynthetic bacteria, a dominant species in surface water, to methane production remains unclear. Here we show methanogenesis triggered by the interaction between oxygenic photosynthetic bacteria and anaerobic methanogenic archaea. By introducing cyanobacterium Synechocystis PCC6803 and methanogenic archaea Methanosarcina barkeri with the redox cycling of iron, CH₄ production was induced in coculture biofilms through both syntrophic methanogenesis (under anoxic conditions in darkness) and abiotic methanogenesis (under oxic conditions in illumination) during the periodic dark-light cycles. We h

SUBMITTER: Ye J 

PROVIDER: S-EPMC11227571 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature