Missing lithotroph identified as new planctomycete
Missing lithotroph identified as new planctomycete
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DOI：
10.1038/22749
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发表时间：
1999-07-29
期刊：
影响因子：
64.8
通讯作者：
Jetten, MSM
中科院分区：
文献类型：
--
作者：
Strous, M;Fuerst, JA;Jetten, MSM
随着农业中化肥使用量的增加，许多人口稠密的国家面临着与高氨排放有关的环境问题。厌氧氨氧化（anammox）工艺是从废水中去除氨氮的最具创新性的技术进步之一（1,2）。这个新工艺将氨和亚硝酸盐直接结合成二氮气体。在此之前，能够厌氧氧化氨的细菌从未被发现过，它们被称为“自然界缺失的养石菌”(4)。在这里，我们报道了这种缺失的养石菌的发现，并将其鉴定为植物菌目的一个新的自养成员，植物菌目是细菌的主要不同分支之一(5)。新的植物菌生长极其缓慢，每两周才分裂一次。目前，它还不能通过传统的微生物技术进行培养。这种细菌作为负责氨厌氧氧化的细菌的鉴定对解决不可培养性问题作出了重要贡献。
With the increased use of chemical fertilizers in agriculture, many densely populated countries face environmental problems associated with high ammonia emissions. The process of anaerobic ammonia oxidation ('anammox') is one of the most innovative technological advances in the removal of ammonia nitrogen from waste water(1,2). This new process combines ammonia and nitrite directly into dinitrogen gas(3). Until now, bacteria capable of anaerobically oxidizing ammonia had never been found and were known as "lithotrophs missing from nature"(4). Here we report the discovery of this missing lithotroph and its identification as a new, autotrophic member of the order Planctomycetales, one of the major distinct divisions of the Bacteria(5). The new planctomycete grows extremely slowly, dividing only once every two weeks. At present, it cannot be cultivated by conventional microbiological techniques. The identification of this bacterium as the one responsible for anaerobic oxidation of ammonia makes an important contribution to the problem of unculturability.