Comammox Nitrospira play an active role in nitrification of agricultural soils amended with nitrogen fertilizers
Chaoyu Li, Hang-Wei Hu, Qing-Lin Chen, Deli Chen, Ji-Zheng He
SOIL BIOLOGY & BIOCHEMISTRY | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2019
The recent discovery of complete ammonia oxidizers (comammox Nitrospira) challenged the paradigm of the two-step nitrification mediated by two distinct groups of nitrifiers, and raised fundamental questions regarding their niche specialization and relative contribution to nitrification in agricultural soils. Previous studies suggest that comammox Nitrospira have an oligotrophic lifestyle and would outcompete canonical ammonia oxidizers (ammonia-oxidizing bacteria and ammonia-oxidizing archaea) under ammonia-limited conditions. Here, we demonstrated that comammox Nitrospira clade A were significantly more abundant than canonical ammonia oxidizers and 13CO2-DNA-stable isotope probing revealed ..View full abstract
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Awarded by Australian Research Council
This work was finally supported by Australian Research Council (DP160101028, LP160101134). The authors would like to thank Ms Zhenzhen Yan and Dr Bing Han for their assistance with soil sampling and Mrs Qing Xie for her help during the incubation trial.