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Related Concept Videos

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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Overview of Nitrogen Metabolism01:20

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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.
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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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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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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.
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Updated: Apr 28, 2026

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis
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Evaluating nitrogen uptake: Methods and applications for plant research.

Emilia Pierce1, Amanda Rasmussen2, Alexandra Huddell1

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Applications in Plant Sciences
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Understanding plant nitrogen uptake is key for efficient agriculture. This review examines methods for measuring nitrogen absorption to improve crop yields and sustainable fertilization practices.

Keywords:
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Area of Science:

  • Plant Physiology
  • Agricultural Science
  • Environmental Science

Background:

  • Nitrogen is vital for plant growth, leading to widespread agricultural fertilization.
  • Excessive nitrogen fertilization poses economic and environmental risks.
  • Optimizing nitrogen uptake is crucial for sustainable agriculture and crop production.

Purpose of the Study:

  • To review and analyze various methods used to quantify plant nitrogen uptake.
  • To highlight the advantages and limitations of different nitrogen uptake measurement techniques.
  • To provide insights for advancing nitrogen uptake research and sustainable management.

Main Methods:

  • Review of established techniques: nitrogen isotopes, solution depletion, compartmented chambers, agarose blocks.
  • Examination of advanced methods: nanoscale secondary ion mass spectrometry (nanoSIMS), microdialysis, biomarkers.
  • Focus on applicability across plant systems, with examples from maize studies.

Main Results:

  • Various methods exist for quantifying nitrogen uptake, each with unique strengths and weaknesses.
  • Techniques range from bulk measurements to highly localized nanoscale analyses.
  • Maize is a significant model system due to its high nitrogen requirements.

Conclusions:

  • A comprehensive understanding of nitrogen uptake mechanisms is essential for optimizing crop production.
  • Evaluating existing methods is critical for developing more efficient and sustainable nitrogen management strategies.
  • Advancements in measurement techniques will support improved agricultural efficiency and reduced environmental impact.