Dissimilatory Nitrate Reduction to Ammonium in Soil

我们研究了(1)哪些微生物具有将土壤中的硝酸盐异化还原为铵(DNRA)的能力，以及(2)该反应在土壤中的重要性。首先，我们研究了从水稻和农田土壤中分离的大约100株细菌的DNRA活性。我们发现芽孢杆菌属、芽孢杆菌属、拟青霉属、肠杆菌属、拉氏杆菌属的细菌都有这种能力。我们还发现，葡萄糖或酒精作为电子供体可以提高酶的活性。然而，添加葡萄糖作为电子供体后，在水稻土中没有观察到显著的DNRA

We studied about (1) which microorganisms have the ability to dissimilatorily reduce nitrate to ammonium (DNRA) in soil and (2) how important the reaction is in soils. Firstly, we investigated the DNRA activity of about 100 bacterial strains which have been isolated from the paddy and cropland soils. We found that bacteria belonging to the genus, Bacillus, Paenibacillus, Enterobavter, Ralstonia have the ability. We also found that glucose or alcohol as the electron donor increase the activity. However, significant DNRA was not observed in the paddy soil after the addition of glucose as the electron donor