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首页> 外文期刊>Applied Microbiology >H2 Production by Selenomonas ruminantium in the Absence and Presence of Methanogenic Bacteria
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H2 Production by Selenomonas ruminantium in the Absence and Presence of Methanogenic Bacteria

机译：不存在有产甲烷菌的反刍动物反刍动物产生氢气

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Selenomonas ruminantium is a nonsporeforming anaerobe that ferments carbohydrates primarily to lactate, propionate, acetate and CO2. H2 production by this species has not been previously reported. We found, however, that some strains produce trace amounts of H2 which can be detected by sensitive gas chromatographic procedures. H2 production is increased markedly, in some cases almost 100-fold, when the selenomonads are co-cultured with methane-producing bacteria. Growth of the methane-producing bacteria depends on H2 production by the selenomonads and the subsequent use of H2 for the reduction of CO2 to CH4. Although no free H2 accumulates in the mixed cultures, the amount of H2 formed by the selenomonads can be calculated from the amount of methane produced. These studies indicate that the conventional methods for measuring H2 production by pure cultures do not provide an adequate estimate of an organism's potential for forming H2 in an anaerobic ecosystem where H2 is rapidly used, e.g., for formation of CH4.
机译：反刍动物硒杆菌是一种非孢子形成的厌氧菌，主要将碳水化合物发酵成乳酸，丙酸酯，乙酸酯和二氧化碳。以前尚未报道过该物种产生的H2。但是，我们发现某些菌株会产生痕量的H2，可以通过灵敏的气相色谱法检测到。当selenomonads与产甲烷细菌共培养时，H2的产量显着增加，在某些情况下几乎增加了100倍。产甲烷的细菌的生长取决于硒单核菌产生的H2以及随后将H2用于将CO2还原为CH4的方法。尽管混合培养物中没有游离的H2积累，但是可以从产生的甲烷量中计算硒代单核糖形成的H2量。这些研究表明，用于通过纯培养物测量H2产生的常规方法不能充分估计生物体在快速使用H2（例如形成CH4）的厌氧生态系统中形成H2的潜力。

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