Environmental Studies and Forestry

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

J. Ye, M. Zhuang, et al.

This groundbreaking study reveals a novel mechanism for methane production in surface waters, highlighting the interaction between oxygenic photosynthetic bacteria and anaerobic methanogenic archaea. Conducted by Jie Ye and colleagues, the research implies that this light-driven methanogenesis could significantly influence the global methane cycle.

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Abstract

This study challenges the conventional understanding of methane production in surface water by demonstrating methanogenesis triggered by the interaction between oxygenic photosynthetic bacteria and anaerobic methanogenic archaea. Coculture biofilms of *Synechocystis* PCC6803 and *Methanosarcina barkeri*, in the presence of iron, produced CH₄ through syntrophic and abiotic methanogenesis during light-dark cycles. This light-driven methanogenesis was observed with other photosynthetic bacteria and methanogens, suggesting a potentially widespread phenomenon impacting the global CH₄ cycle.

Publisher

Nature Communications

Published On

Jul 06, 2024

Authors

Jie Ye, Minghan Zhuang, Mingqiu Hong, Dong Zhang, Guoping Ren, Andong Hu, Chaohui Yang, Zhen He, Shungui Zhou

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