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Change in gas partial pressures, concentrations, and Gibbs free energies of control (closed symbols) and CH3F (open symbols) rice root incubations: (A) CH4 (•, ○) and CH3F (□); (B) acetate (♦, ⋄) and propionate (▴, ▵); (C) Gibbs free energies of the conversion of CO2 and H2 to CH4 (▾, ▿) and of the conversion of acetate to CH4 and CO2 (♦, ⋄). Values are means ± standard errors; n = 3.
