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Characterization and quantification of ammonia-oxidizing archaea (AOA) and bacteria (AOB) in a nitrogen-removing reactor using T-RFLP and qPCR
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Characterization and quantification of ammonia-oxidizing archaea (AOA) and bacteria (AOB) in a nitrogen-removing reactor using T-RFLP and qPCR
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Characterization and quantification of ammonia-oxidizing archaea (AOA) and bacteria (AOB) in a nitrogen-removing reactor using T-RFLP and qPCR
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Journal Article
Characterization and quantification of ammonia-oxidizing archaea (AOA) and bacteria (AOB) in a nitrogen-removing reactor using T-RFLP and qPCR
2010
Overview
Using ammonia monooxygenase α-subunit (amoA) gene and 16S rRNA gene, the community structure and abundance of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) in a nitrogen-removing reactor, which was operated for five phases, were characterized and quantified by cloning, terminal restriction fragment length polymorphism (T-RFLP), and quantitative polymerase chain reaction (qPCR). The results suggested that the dominant AOB in the reactor fell to the genus Nitrosomonas, while the dominant AOA belonged to Crenarchaeotal Group I.1a in phylum Crenarchaeota. Real-time PCR results demonstrated that the levels of AOB amoA varied from 2.9 × 10³ to 2.3 × 10⁵ copies per nanogram DNA, greatly (about 60 times) higher than those of AOA, which ranged from 1.7 × 10² to 3.8 × 10³ copies per nanogram DNA. This indicated the possible leading role of AOB in the nitrification process in this study. T-RFLP results showed that the AOB community structure significantly shifted in different phases while AOA only showed one major peak for all the phases. The analyses also suggested that the AOB community was more sensitive than that of AOA to operational conditions, such as ammonia loading and dissolved oxygen.
Publisher
Berlin/Heidelberg : Springer-Verlag,Springer-Verlag,Springer,Springer Nature B.V
Subject
/ Ammonia monooxygenase α-subunit (amoA) gene
/ Ammonia-oxidizing archaea (AOA)
/ Ammonia-oxidizing bacteria (AOB)
/ Archaea
/ Archaea - isolation & purification
/ Archaeal Proteins - genetics
/ Bacteria
/ Bacteria - isolation & purification
/ Bacterial Proteins - genetics
/ Biological and medical sciences
/ Biomedical and Life Sciences
/ Cloning
/ DNA
/ Enzymes
/ Fundamental and applied biological sciences. Psychology
/ Genes
/ genetics
/ Microbial Genetics and Genomics
/ Nitrogen
/ Phases
/ Polymorphism, Restriction Fragment Length
/ qPCR
/ quantitative polymerase chain reaction
/ Reactors
/ Restriction fragment length polymorphism
/ rRNA 16S
/ Salinity
/ Sludge
/ Studies
/ T-RFLP
