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Inorganic Nitrogen Assimilation01:22

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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

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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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Related Experiment Video

Updated: Oct 22, 2025

Measuring Nitrite and Nitrate, Metabolites in the Nitric Oxide Pathway, in Biological Materials using the Chemiluminescence Method
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Measuring Nitrite and Nitrate, Metabolites in the Nitric Oxide Pathway, in Biological Materials using the Chemiluminescence Method

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Nitrate Assay for Plant Tissues.

Lufei Zhao1, Yong Wang1

  • 1State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an, China.

Bio-Protocol
|August 30, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a reliable salicylic acid method for measuring nitrate content in plant tissues. This technique accurately reflects soil nitrogen supply, aiding plant nutrition analysis.

Keywords:
OD410BoilNaOHNitrate contentPlantSalicylic acid-sulphuric acidStandard curve

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Area of Science:

  • Plant Science
  • Agricultural Chemistry
  • Analytical Chemistry

Background:

  • Nitrogen is a vital macronutrient for plant development.
  • Plant nitrate levels serve as indicators of soil nitrogen availability.
  • Accurate measurement of plant nitrate is crucial for understanding plant nutrition and soil health.

Purpose of the Study:

  • To present a novel and reliable method for quantifying nitrate content in plant tissues.
  • To establish the salicylic acid method as a viable alternative for nitrate analysis in plants.
  • To provide researchers with a stable and effective tool for assessing plant nitrogen status.

Main Methods:

  • Development and validation of the salicylic acid method for nitrate determination.
  • Application of the method to various plant tissues.
  • Assessment of the method's reliability and stability.

Main Results:

  • The salicylic acid method provides a reliable and stable measurement of nitrate in plant tissues.
  • The method's results correlate with the soil's nitrogen supply.
  • The technique is suitable for routine analysis in plant laboratories.

Conclusions:

  • The salicylic acid method is a dependable and effective technique for evaluating nitrate content in plants.
  • This method offers a valuable tool for plant nutrition studies and soil fertility assessment.
  • The established protocol can enhance the accuracy of plant nitrogen status evaluation.