pH regulates ammonia-oxidizing bacteria and archaea in paddy soils in Southern China

Applied Microbiology and Biotechnology
Hu LiXiao-Ru Yang

Abstract

Ammonia-oxidizing archaea (AOA) and bacteria (AOB) play important roles in nitrogen cycling. However, the effects of environmental factors on the activity, abundance, and diversity of AOA and AOB and the relative contributions of these two groups to nitrification in paddy soils are not well explained. In this study, potential nitrification activity (PNA), abundance, and diversity of amoA genes from 12 paddy soils in Southern China were determined by potential nitrification assay, quantitative PCR, and cloning. The results showed that PNA was highly variable between paddy soils, ranging from 4.05 ± 0.21 to 9.81 ± 1.09 mg NOx-N kg(-1) dry soil day(-1), and no significant correlation with soil parameters was found. The abundance of AOA was predominant over AOB, indicating that AOA may be the major members in aerobic ammonia oxidation in these paddy soils. Community compositions of AOA and AOB were highly variable among samples, but the variations were best explained by pH. AOA sequences were affiliated to the Nitrosopumilus cluster and Nitrososphaera cluster, and AOB were classified into the lineages of Nitrosospira and Nitrosomonas, with Nitrosospira being predominant over Nitrosomonas, accounting for 83.6 % of the AOB community....Continue Reading

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Citations

Mar 11, 2016·Environmental Science and Pollution Research International·He SongZhaorong Dong
Jul 22, 2018·Applied Microbiology and Biotechnology·Dawen GaoHong Liang
Dec 2, 2020·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Chunyong WangYanshan Cui
Jul 27, 2021·The Science of the Total Environment·Xinying ZhangChuanhua Wang
Apr 13, 2019·Environmental Science & Technology·Hu LiYong-Guan Zhu

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