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Related Concept Videos

Inorganic Nitrogen Assimilation01:22

Inorganic Nitrogen Assimilation

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Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
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Overview of Nitrogen Metabolism01:20

Overview of Nitrogen Metabolism

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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
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The Roles of Bacteria and Fungi in Plant Nutrition02:11

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Plants have the impressive ability to create their own food through photosynthesis. However, plants often require assistance from organisms in the soil to acquire the nutrients they need to function correctly. Both bacteria and fungi have evolved symbiotic relationships with plants that help the species to thrive in a wide variety of environments.
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The Nitrogen Cycle01:49

The Nitrogen Cycle

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Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
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Overview of Metabolism01:40

Overview of Metabolism

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Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
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Key Elements for Plant Nutrition02:35

Key Elements for Plant Nutrition

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Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
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Related Experiment Video

Updated: Nov 25, 2025

Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
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Quantitative models of nitrogen-fixing organisms.

Keisuke Inomura1, Curtis Deutsch1, Takako Masuda2

  • 1School of Oceanography, University of Washington, Seattle, WA, USA.

Computational and Structural Biotechnology Journal
|December 18, 2020
PubMed
Summary
This summary is machine-generated.

Nitrogen-fixing organisms are crucial for the biosphere. This review explores quantitative models for studying these organisms, aiming to improve the link between theoretical and empirical research.

Keywords:
Mathematical modelNitrogen fixationNitrogen fixersOxygenPhotosynthesisQuantitative model

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Area of Science:

  • Environmental Science
  • Microbiology
  • Biogeochemistry

Background:

  • Nitrogen-fixing organisms are vital for supplying bioavailable nitrogen to ecosystems.
  • Quantitative models offer a valuable complement to traditional experimental and in situ measurements for studying these organisms.
  • Evaluating nitrogen fixation can be challenging and costly through empirical methods alone.

Purpose of the Study:

  • To review the current status of quantitative modeling for nitrogen-fixing organisms.
  • To identify strategies for strengthening the connection between theoretical modeling and empirical research in this field.

Main Methods:

  • Literature review of quantitative modeling approaches for nitrogen fixation.
  • Analysis of existing theoretical frameworks and empirical validation studies.
  • Synthesis of findings to propose future research directions.

Main Results:

  • The review synthesizes current quantitative modeling techniques applied to nitrogen fixation.
  • Identifies key challenges and opportunities in integrating model predictions with experimental data.
  • Highlights the growing importance of computational approaches in environmental microbiology.

Conclusions:

  • Quantitative models are essential tools for understanding nitrogen fixation processes.
  • Enhanced collaboration between modelers and experimentalists is needed to advance the field.
  • Bridging theoretical and empirical studies will improve our comprehension of nitrogen cycling in the biosphere.