An optimized hydroponic pipeline for large‐scale identification of wheat genotypes with resilient biological nitrification inhibition activity

Jáuregui, Iván; Vega‐Mas, Izargi; Delaplace, Pierre; Vanderschuren, Hervé; Thonar, Cécile

doi:10.1111/nph.18807

Cited by 4 publications

(3 citation statements)

References 42 publications

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“…Exudates might reduce the enzymatic oxidation or the nitrifier population size. BNIs from tree roots slow down nitrifier growth, while those from wheat reduce ammonium oxidation 15 , 48 . Many experiments, however, do not distinguish death, growth, and oxidation.…”

Section: Discussionmentioning

confidence: 99%

Benefits and limits of biological nitrification inhibitors for plant nitrogen uptake and the environment

Kuppe,

Postma

2024

Sci Rep

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Plant growth and high yields are secured by intensive use of nitrogen (N) fertilizer, which, however, pollutes the environment, especially when N is in the form of nitrate. Ammonium is oxidized to nitrate by nitrifiers, but roots can release biological nitrification inhibitors (BNIs). Under what conditions does root-exudation of BNIs facilitate nitrogen N uptake and reduce pollution by N loss to the environment? We modeled the spatial–temporal dynamics of nitrifiers, ammonium, nitrate, and BNIs around a root and simulated root N uptake and net rhizosphere N loss over the plant’s life cycle. We determined the sensitivity of N uptake and loss to variations in the parameter values, testing a broad range of soil–plant-microbial conditions, including concentrations, diffusion, sorption, nitrification, population growth, and uptake kinetics. An increase in BNI exudation reduces net N loss and, under most conditions, increases plant N uptake. BNIs decrease uptake in the case of (1) low ammonium concentrations, (2) high ammonium adsorption to the soil, (3) rapid nitrate- or slow ammonium uptake by the plant, and (4) a slowly growing or (5) fast-declining nitrifier population. Bactericidal inhibitors facilitate uptake more than bacteriostatic ones. Some nitrification, however, is necessary to maximize uptake by both ammonium and nitrate transporter systems. An increase in BNI exudation should be co-selected with improved ammonium uptake. BNIs can reduce N uptake, which may explain why not all species exude BNIs but have a generally positive effect on the environment by increasing rhizosphere N retention.

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Section: Discussionmentioning

confidence: 99%

Benefits and limits of biological nitrification inhibitors for plant nitrogen uptake and the environment

Kuppe,

Postma

2024

Sci Rep

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show abstract

“…Exudates might reduce the enzymatic oxidation or the nitrifier population size. BNIs from tree roots slow down nitrifier growth, while those from wheat reduce ammonium oxidation 11,26 . Many experiments, however, do not distinguish death, growth, and oxidation.…”

Section: Discussionmentioning

confidence: 99%

Benefits and limits of biological nitrification inhibitors for plant N uptake and the environment

Kuppe

Postma

2023

Preprint

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Does root-exudation of biological nitrification inhibitors (BNIs) facilitate nitrogen (N) uptake and reduce pollution by N loss to the environment? We modeled the spatial-temporal dynamics of nitrifiers, ammonium, nitrate, and BNIs around a root and simulated root N uptake and net rhizosphere N loss over the plant's life cycle. We determined the sensitivity of N uptake and loss to variation in the parameters, testing a broad range of soil-plant-microbial conditions. An increase in BNI exudation reduces net N loss and, under most conditions, plant N uptake. BNIs decrease uptake in the case of (1) low ammonium concentrations, (2) high ammonium adsorption to the soil, (3) rapid nitrate- or slow ammonium uptake by the plant, and (4) a slowly growing or fast-declining nitrifier population. Bactericidal inhibitors facilitate uptake more than bacteriostatic ones. Some nitrification, however, is necessary to maximize uptake by both ammonium and nitrate transporter systems. Selection for increased BNI exudation should co-select for improved ammonium uptake. BNIs can reduce N uptake, which may explain why not all species exude BNIs but have a generally positive effect on the environment by increasing rhizosphere N retention.

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“…Historically, the detection of BNI in plants has centered on identifying potential BNI substances in root exudates and testing their inhibitory effects on pure nitrifier cultures (Subbarao, Nakahara, et al., 2013). Although further hydroponic studies have demonstrated efficiency in identifying BNI genotypes (Chen et al., 2022; Jáuregui et al., 2023), field verification is still necessary. DNA‐based methods have been utilized to analyze the nitrifier communities and abundance, along with potential nitrification assays to assess BNI in the field (Burnham et al., 2022).…”

Section: Introductionmentioning

confidence: 99%

Nitrogen acquisition and retention pathways in sustainable perennial bioenergy grass cropping systems

Duan,

Kent

2024

GCB Bioenergy

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Perennial tall grasses show promise as bioenergy crops due to high productivity and efficient nutrient use. Ongoing research on bioenergy grasses seeks to reduce their reliance on synthetic nitrogen (N) fertilizer, the manufacture of which relies on fossil fuel combustion. Excessive use of fertilizers also causes adverse environmental consequences and leads to the evolutionary loss of plant traits beneficial to sustainable N cycle. Notably, perennial tall grasses have exhibited the potential to maintain high biomass yield without the need for N fertilizer or causing soil N depletion. Perennial grasses can be adept at interacting with their microbial partners to facilitate N acquisition and retention via mechanisms such as biological N fixation and nitrification inhibition. These inherent N management traits should be preserved and optimized at the this early stage of bioenergy grass breeding programs. This review examines the impact of external N on bioenergy grass production and explores the potential of leveraging advantageous N‐cycling attributes of perennial tall grasses, laying groundwork for future management and research efforts. With minimized dependency on external N input, the cultivation of perennial energy grasses will pave the way toward more resilient agricultural systems and play a significant role in addressing key global energy and environmental challenges.

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An optimized hydroponic pipeline for large‐scale identification of wheat genotypes with resilient biological nitrification inhibition activity

Cited by 4 publications

References 42 publications

Benefits and limits of biological nitrification inhibitors for plant nitrogen uptake and the environment

Benefits and limits of biological nitrification inhibitors for plant nitrogen uptake and the environment

Benefits and limits of biological nitrification inhibitors for plant N uptake and the environment

Nitrogen acquisition and retention pathways in sustainable perennial bioenergy grass cropping systems

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