So-Jeong Kim

TL;DR: It is found that α-keto acids functioned as chemical scavengers that detoxified intracellularly produced H2O2 during ammonia oxidation, and this indicates that AOA broadly feature strict autotrophic nutrition and implicate H 2O2 as an important factor determining the activity, evolution, and community ecology of AOA ecotypes.

TL;DR: A 15N-NH4+-labeling experiment indicated that N2O originated from two different production pathways (that is, ammonia oxidation and nitrifier denitrification), which suggests that the isotopic signatures of N 2O from AOA may be attributable to the relative contributions of these two processes.

TL;DR: Genes related to the utilization of various anaerobic electron acceptors, including iron, nitrate (to ammonia), sulfur and fumarate, were identified and a diverse array of genes for oxidative stress responses were detected in the TF genome, suggesting this metabolic versatility may be an adaptation to the fluctuating availability of electron acceptor and donors in tidal flats.

TL;DR: This study isolated and characterized an ammonia-oxidizing archaeon, strain MY3, from a coal tar-contaminated sediment, and found a strong potential for surface attachment by strain My3 may reflect an adaptation to the selective pressures in hydrophobic terrestrial environments.

TL;DR: The discovery of a chemolithoautotrophic ammonia oxidizer that belongs to a distinct clade of nonmarine thaumarchaeal group I.1a, which is widespread in terrestrial environments is reported and the name “Candidatus Nitrosotenuis chungbukensis” is proposed for the ammonia-oxidizing archaeal strain MY2.