A New Perspective on Microbes Formerly Known as Nitrite-Oxidizing Bacteria

Trends in Microbiology, Journal Year: 2016, Volume and Issue: 24(9), P. 699 - 712

Published: June 6, 2016

Language: Английский

---

Comammox—a newly discovered nitrification process in the terrestrial nitrogen cycle

Journal of Soils and Sediments, Journal Year: 2017, Volume and Issue: 17(12), P. 2709 - 2717

Published: Oct. 18, 2017

Language: Английский

---

Membrane inlet mass spectrometry method (REOX/MIMS) to measure 15N-nitrate in isotope-enrichment experiments

Ecological Indicators, Journal Year: 2021, Volume and Issue: 126, P. 107639 - 107639

Published: March 30, 2021

Using 15N stable isotope as a tracer to quantify N transformation rates in isotope-enrichment experiments improves understanding of the cycle various ecosystems. However, measuring 15N-nitrate (15NO3−) small volumes water for these is major challenge due inconvenience preparing samples by traditional techniques. We developed "REOX/MIMS" method applying membrane inlet mass spectrometry (MIMS) determining 15NO3− concentrations from after converting dissolved inorganic N2. The nitrates (NO3− + NO2−) were reduced NH4+ with zinc powder, and ammonium (NH4+) was then oxidized N2 hypobromite iodine solution. resulting 29N2 30N2 measured via MIMS. This optimized protocol provides sensitive (~0.1 μM) precise (relative standard deviation = 0.1–4.37%) approach (0.1–500 µM) over wide range salinities (0–35‰) 2 M KCl solution excellent calibration curves (R2 ≥ 0.9996, p < 0.0001). combined incubation measure gross nitrification NO3− immobilization It rapid, accurate, cost-effective. Future applications this efficient will inform scientists, modelers decision makers about mechanisms, sources, fates, effects delivered or produced numerous aquatic terrestrial

Language: Английский

---

Unraveling the Interactions between Flooding Dynamics and Agricultural Productivity in a Changing Climate

Sustainability, Journal Year: 2024, Volume and Issue: 16(14), P. 6141 - 6141

Published: July 18, 2024

Extreme precipitation and flooding frequency associated with global climate change are expected to increase worldwide, major consequences in floodplains areas susceptible flooding. The purpose of this review was examine the effects events on changes soil properties their agricultural production. Flooding is caused by natural anthropogenic factors, can be amplified interactions between rainfall catchments. impacts structure aggregation altering resistance slaking, which occurs when aggregates not strong enough withstand internal stresses rapid water uptake. disruption enhance erosion sediment transport during contribute sedimentation bodies degradation aquatic ecosystems. Total precipitation, flood discharge, total main factors controlling suspended mineral-associated organic matter, dissolved particulate matter loads. Studies conducted paddy rice cultivation show that flooded reduced conditions neutralize pH but reversible upon draining soil. In soil, nitrogen cycling linked decreases oxygen, accumulation ammonium, volatilization ammonia. Ammonium primary form inorganic porewaters. floodplains, nitrate removal enhanced high denitrification intermittent provides necessary anaerobic conditions. soils, reductive dissolution minerals release phosphorus (P) into solution. Phosphorus mobilized events, leading increased availability first weeks waterlogging, generally time. Rainstorms promote subsurface P-enriched particles, colloidal P account for up 64% tile drainage water. Anaerobic microorganisms prevailing utilize alternate electron acceptors, such as nitrate, sulfate, carbon dioxide, energy production decomposition. metabolism leads fermentation by-products, acids, methane, hydrogen sulfide, influencing pH, redox potential, nutrient availability. Soil enzyme activity presence various microbial groups, including Gram+ Gram− bacteria mycorrhizal fungi, affected Waterlogging β-glucosidase acid phosphomonoesterase increases N-acetyl-β-glucosaminidase Since these enzymes control hydrolysis cellulose, phosphomonoesters, chitin, moisture content impact direction magnitude supply oxygen submerged plants limited because its diffusion extremely low, mitochondrial respiration plant tissues. Fermentation only viable pathway plants, which, under prolonged waterlogging conditions, inefficient results death. Seed germination also impaired stress due decreased sugar phytohormone biosynthesis. sensitivity different crops varies significantly across growth stages. Mitigation adaptation strategies, essential management agriculture, resilience through improved practices, amendments rehabilitation techniques, best zero tillage cover crops, development flood-tolerant crop varieties. Technological advances play a crucial role assessing dynamics landscapes. This embarks comprehensive journey existing research unravel intricate interplay production, environment. We synthesize available knowledge address critical gaps understanding, identify methodological challenges, propose future directions.

Language: Английский

---

Crop rotations alter bacterial and fungal diversity in paddy soils across East Asia

Soil Biology and Biochemistry, Journal Year: 2016, Volume and Issue: 95, P. 250 - 261

Published: Jan. 23, 2016

Language: Английский

---

Ammonium sorption and ammonia inhibition of nitrite-oxidizing bacteria explain contrasting soil N2O production

Scientific Reports, Journal Year: 2015, Volume and Issue: 5(1)

Published: July 16, 2015

Abstract Better understanding of process controls over nitrous oxide (N 2 O) production in urine-impacted ‘hot spots’ and fertilizer bands is needed to improve mitigation strategies emission models. Following amendment with bovine ( Bos taurus ) urine (Bu) or urea (Ur), we measured inorganic N, pH, N O genes associated nitrification two soils (‘ L ’ ‘ W ’) having similar texture, C C/N ratio. Solution-phase ammonia sl NH 3 was also calculated accounting for non-linear ammonium (NH 4 + sorption capacities (ASC). Soil displayed greater rates nitrate (NO − levels than soil , but more resistant nitrite accumulation produced ten times less . Genes NO oxidation nxr A) increased substantially remained static strongly correlated cumulative c- explained 87% the variance Differences between were by which inhibited oxidization leading production. This first study correlate dynamics nitrifier show how ASC can regulate

Language: Английский

---

Comammox Nitrospira clade B contributes to nitrification in soil

Soil Biology and Biochemistry, Journal Year: 2019, Volume and Issue: 135, P. 392 - 395

Published: June 5, 2019

Language: Английский

---

Ubiquity, diversity, and activity of comammox Nitrospira in agricultural soils

The Science of The Total Environment, Journal Year: 2019, Volume and Issue: 706, P. 135684 - 135684

Published: Nov. 22, 2019

Language: Английский

---

Newly designed primer pair revealed dominant and diverse comammox amoA gene in full-scale wastewater treatment plants

Bioresource Technology, Journal Year: 2018, Volume and Issue: 270, P. 580 - 587

Published: Sept. 17, 2018

Language: Английский

---

High temperatures inhibited the growth of soil bacteria and archaea but not that of fungi and altered nitrous oxide production mechanisms from different nitrogen sources in an acidic soil

Soil Biology and Biochemistry, Journal Year: 2017, Volume and Issue: 107, P. 168 - 179

Published: Jan. 19, 2017

Language: Английский

---