Phylogenomic evidence for the Origin of Obligately Anaerobic Anammox Bacteria around the Great Oxidation Event

Liao, Tianhua; Wang, Sishuo; Luo, Haiwei

doi:10.1101/2021.07.07.451387

Cited by 2 publications

(1 citation statement)

References 130 publications

(244 reference statements)

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“…Bathyanammoxibiaceae is also consistent with the recent phylogenomic and molecular clock analysis of anammox bacteria [79]. In this work, anammox bacteria on Earth were inferred to emerge around the Great Oxidation Event [79], during ammonium is the dominant oceanic nitrogen species [1]. Ca .…”

Section: Resultssupporting

confidence: 82%

Nitrite accumulation and the associated anammox bacteria niche partitioning in marine sediments

Zhao

Babbin

Roerdink

et al. 2022

Preprint

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By consuming ammonium and nitrite, anammox bacteria form an important functional guild in nitrogen cycling in many environments including marine sediments. Recent studies have shown that anammox bacteria can consume most of the upwardly diffusing ammonium from deep anoxic sediments; however, their impact on the other important substrate nitrite has not been well characterized. Here we show niche partitioning of two anammox families emerges in a 2.4 m long mostly anoxic sediment core retrieved from the Nordic Seas. We document high abundances of anammox bacteria in most investigated sediment layers, with two distinct anammox abundance maxima in two nitrite consumption zones. Between the two anammox abundance maxima, nitrite accumulates as observed in other marine sediment sites and aquatic environments, indicating anammox bacteria play a fundamental role in modulating the nitrite distribution. Anammox bacteria in the upper nitrite consumption zone are dominated by the Candidatus Bathyanammoxibiaceae family, while Ca. Scalinduaceae family dominate at the lower zone. A high-quality representative Ca. Bathyanammoxibiaceae genome is recovered, which, comparing to Ca. Scalindua sediminis, the representative of Scalinduaceae in marine sediments, has fewer high affinity ammonium transporters and lacks the capacity to access alternative substrates or energy sources such as urea and cyanate. These features may restrict Ca. Bathyanammoxibiaceae to conditions of higher ammonium concentrations or fluxes, and therefore drive the observed niche partitioning. These findings improve our understanding about nitrogen cycling in marine sediments by revealing the association between nitrite accumulation and niche partitioning of anammox bacteria.

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Section: Resultssupporting

confidence: 82%

Nitrite accumulation and the associated anammox bacteria niche partitioning in marine sediments

Zhao

Babbin

Roerdink

et al. 2022

Preprint

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Introducing Candidatus Bathyanammoxibiaceae, a family of bacteria with the anammox potential present in both marine and terrestrial environments

Zhao

Biddle

Jørgensen

2022

ISME Communications

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Anaerobic ammonium oxidation (Anammox) bacteria are a group of extraordinary bacteria exerting a major impact on the global nitrogen cycle. Their phylogenetic breadth and diversity, however, are not well constrained. Here we describe a new, deep-branching family in the order of Candidatus Brocadiales, Candidatus Bathyanammoxibiaceae, members of which have genes encoding the key enzymes of the anammox metabolism. In marine sediment cores from the Arctic Mid-Ocean Ridge (AMOR), the presence of Ca. Bathyanammoxibiaceae was confined within the nitrate-ammonium transition zones with the counter gradients of nitrate and ammonium, coinciding with the predicted occurrence of the anammox process. Ca. Bathyanammoxibiaceae genomes encode the core genetic machinery for the anammox metabolism, including hydrazine synthase for converting nitric oxide and ammonium to hydrazine, and hydrazine dehydrogenase for hydrazine oxidation to dinitrogen gas, and hydroxylamine oxidoreductase for nitrite reduction to nitric oxide. Their occurrences assessed by genomes and 16S rRNA gene sequencings surveys indicate that they are present in both marine and terrestrial environments. By introducing the anammox potential of Ca. Bathyanammoxibiaceae and charactering their ideal niche in marine sediments, our findings suggest that the diversity and abundance of anammox bacteria may be higher than previously thought, and provide important insights on cultivating them in the future to not only assess their biogeochemical impacts but also constrain the emergence and evolutionary history of this functional guild on Earth.

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Phylogenomic evidence for the Origin of Obligately Anaerobic Anammox Bacteria around the Great Oxidation Event

Cited by 2 publications

References 130 publications

Nitrite accumulation and the associated anammox bacteria niche partitioning in marine sediments

Nitrite accumulation and the associated anammox bacteria niche partitioning in marine sediments

Introducing Candidatus Bathyanammoxibiaceae, a family of bacteria with the anammox potential present in both marine and terrestrial environments

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