Production and Excretion of Polyamines To Tolerate High Ammonia, a Case Study on Soil Ammonia-Oxidizing Archaeon “
Candidatus
Nitrosocosmicus agrestis”
Ammonia tolerance of AOA is usually much lower than that of the AOB, which makes the AOB rather than AOA a predominant ammonia oxidizer in agricultural soils, contributing to global N
2
O emission. Recently, some AOA species from the genus “
Ca.
Nitrosocosmicus” were also found to have high ammonia tolerance.