Abundance and diversity of ammonia-oxidizing archaea and bacteria in the rhizosphere soil of three plants in the Ebinur Lake wetland
Abundance and diversity of ammonia-oxidizing archaea and bacteria in the rhizosphere soil of three plants in the Ebinur Lake wetland
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DOI：
10.1139/cjm-2016-0492
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Yan Gao
中科院分区：
文献类型：
--
作者：
Yuan He;Wenge Hu;Decao Ma;Hongzhu Lan;Yang Yang;Yan Gao
Ammonia oxidation is carried out by ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA). The Ebinur Lake wetland is the best xample of a temperate arid zone wetland ecosystem in China.Soil samples were collected from rhizosphere and non-rhizosphere soil containing alocnemum strobilaceum (samples H and H=), Phragmites australis (samples R and R=), and Karelinia caspia (samples K and K=) to study the relationship between environmental factors and the community structure of AOB and AOA. Phylogenetic analysis showed that the AOA sequences belonged to the Nitrosopumilus and Nitrososphaera clusters. AOB were grouped into Nitrosospira sp. and Nitrosomonas sp. Quantitative polymerase chain reaction results showed that the AOA abundance ranged from 2.09 × 104 to 2.94 × 105 gene copies/g soil. The highest number of AOA was detected in sample K,.followed by samples R and H. AOB abundance varied between 2.91 × 105 and 1.05 × 106 gene copies/g soil, which was higher than that of AOA. Redundancy analysis indicated that electrical conductivity, pH, and NH4+-N might influence the community structure of AOA and AOB. AOB might play a more crucial role than AOA in ammonia oxidation based on AOB’s higher diversity and abundance in the Ebinur Lake wetland in Xinjiang.
