Analysis of Ammonia Monooxygenase and Archaeal 16S rRNA Gene Fragments in Nitrifying Acid-Sulfate Soil Microcosms

作者：Nakaya Asami; Onodera Yuki; Nakagawa Tatsunori^*; Satoh Kazuo; Takahashi Reiji; Sasaki Satohiko; Tokuyama Tatsuaki

来源：Microbes and Environments, 2009, 24(2): 168-174.

DOI：10.1264/jsme2.ME09104

• ammonia-oxidizing archaea
• acid-sulfate soil
• nitrification
• low pH
• ammonia-oxidizing bacteria

The present study describes the occurrence of a unique archaeal ammonia monooxygenase alpha subunit (amoA) gene in nitrifying acid-sulfate soil microcosms at pH 3.5. The soil was collected from an abandoned paddy field in Thailand. Microcosms were incubated in the dark at 30 degrees C for 372 days with the following three treatments: addition of ammonium sulfate solution once a month (I) or once a week (II), and addition of only sterilized water (III). A quantitative PCR analysis revealed an increase in abundance of the archaeal amoA gene in microcosm soils in which nitrate concentrations increased after incubation. A phylogenetic analysis indicated a predominance of the novel gene, and a predominance of a betaproteobacterial amoA gene affiliated with the genus Nitrosospira. A 16S rRNA gene-based PCR assay revealed that crenarchaeotic Group I.1d was predominant among the Crenarchaeota in microcosms. These results suggest the presence of ammonia-oxidizing archaea corresponding to the unique amoA lineage in nitrifying acid-sulfate soil microcosms at pH 3.5.

• 出版日期2009