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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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Updated: Dec 24, 2025

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis
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Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis

Published on: May 10, 2020

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How does nitrogen shape plant architecture?

Le Luo1,2, Yali Zhang1,2, Guohua Xu1,2

  • 1State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, China.

Journal of Experimental Botany
|April 13, 2020
PubMed
Summary
This summary is machine-generated.

Nitrogen (N) significantly influences plant architecture, affecting shoot branching, flowering, and panicle development in crops. Understanding N regulation of plant growth is key to improving crop yield and nitrogen use efficiency.

Keywords:
Amino acidsammoniumarchitectureflowering timenitratepanicle structurephytohormonesshoot branchingtilleringtranscription factortransporter

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Area of Science:

  • Plant Physiology
  • Agronomy
  • Crop Science

Background:

  • Nitrogen (N) is crucial for plant growth, with root adaptation to N supply well-studied.
  • Limited information exists on how N affects the architecture of plant organs, impacting crop yield.
  • This review consolidates knowledge on N's role in shaping plant architecture.

Purpose of the Study:

  • To review nitrate and amino acid regulation of shoot branching, flowering, and panicle development.
  • To summarize N's control over cell division and expansion in cereal crop architecture.
  • To elucidate N-regulated pathways influencing plant architecture and yield.

Main Methods:

  • Literature review on nitrogen regulation of plant architecture.
  • Synthesis of findings on nitrate, amino acid, and hormone interactions.
  • Analysis of N effects on vegetative and reproductive organ development.

Main Results:

  • Nitrogen supply regulates shoot branching, flowering, and panicle development.
  • Plant architecture is shaped by N-controlled cell division and expansion.
  • Hormonal pathways (auxin, cytokinin, strigolactone, gibberellin) mediate N effects.
  • Amino acid transport influences shoot branching.

Conclusions:

  • Nitrogen management is critical for optimizing cereal crop architecture and yield.
  • Understanding N-regulated plant architecture enhances nitrogen use efficiency.
  • Manipulation of N-driven architectural traits can boost crop productivity.