Fig. 8: Proposed mechanism for the role of PSY rice genotypes in mitigating CH4 emissions. | Nature Communications

Fig. 8: Proposed mechanism for the role of PSY rice genotypes in mitigating CH4 emissions.

From: Reduced methane emissions in transgenic rice genotypes are associated with altered rhizosphere microbial hydrogen cycling

Fig. 8: Proposed mechanism for the role of PSY rice genotypes in mitigating CH4 emissions.

PSY rice genotypes have longer roots with more aerenchyma compared with Kitaake. O2 is transported from the atmosphere to the rhizosphere through aerenchyma. PSY rice roots secrete more gluconeogenic acids (white circles), mostly amino acids, that can facilitate the activities of H2-consuming bacteria (indicated by cell sizes), thus reducing the total H2 pool for H2-dependent methanogenesis. The produced CH4 was partially oxidized in situ by methanotrophic bacteria, and the rest was emitted into the atmosphere. Created in BioRender. Shi, L. (2026) https://BioRender.com/gq0748f.

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