Abram J W, Nedwell D B
Arch Microbiol. 1978 Apr 27;117(1):93-7. doi: 10.1007/BF00689357.
Hydrogen gas stimulated sulphate reduction in a saltmarsh sediment and the importance of H2 transferred from organotrophic bacteria to the sulphate-reducers is discussed. beta-fluorolactate inhibited sulphate reduction whether lactate, ethanol or hydrogen was being used as growth substrate. When added to sediment beta-fluorolactate inhibited sulphate reduction with a consequent increase in methane production. Addition of H2 stimulated methanogenesis in sediment and this stimulation was greater if CO2 was also present. Hydrogen availability was the primary limitation of methanogenesis but the low concentration of dissolved CO2 in seawater may limit methane production even if H2 is available. The removal of inhibition of methanogenesis by the use of fluorolactate to suppress sulphate reduction or by the provision of hydrogen indicates competitive inhibition of methanogens by sulphate reducers utilizing transferred hydrogen.
讨论了氢气对盐沼沉积物中硫酸盐还原的刺激作用，以及从有机营养细菌转移到硫酸盐还原菌的氢气的重要性。β-氟乳酸抑制硫酸盐还原，无论乳酸、乙醇或氢气是否用作生长底物。添加到沉积物中的β-氟乳酸抑制硫酸盐还原，从而导致甲烷产量增加。添加氢气刺激沉积物中的甲烷生成，如果同时存在二氧化碳，这种刺激作用会更大。氢气的可利用性是甲烷生成的主要限制因素，但即使有氢气，海水中溶解二氧化碳的低浓度也可能限制甲烷的生成。通过使用氟乳酸抑制硫酸盐还原或提供氢气来消除对甲烷生成的抑制，表明利用转移氢气的硫酸盐还原菌对产甲烷菌具有竞争性抑制作用。
