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Related Concept Videos

Inorganic Nitrogen Assimilation01:22

Inorganic Nitrogen Assimilation

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 nitrate reductase...
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Key Elements for Plant Nutrition

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 atmosphere, the...
Transcription01:10

Transcription

Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
The Roles of Bacteria and Fungi in Plant Nutrition02:11

The Roles of Bacteria and Fungi in Plant Nutrition

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Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...

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Related Experiment Video

Updated: Jun 13, 2026

An Optimized Rhizobox Protocol to Visualize Root Growth and Responsiveness to Localized Nutrients
07:45

An Optimized Rhizobox Protocol to Visualize Root Growth and Responsiveness to Localized Nutrients

Published on: October 22, 2018

Tomato root transcriptome response to a nitrogen-enriched soil patch.

Daniel R Ruzicka1, Felipe H Barrios-Masias, Natasha T Hausmann

  • 1Donald Danforth Plant Science Center, 975 N Warson Rd., St. Louis. MO 63132, USA.

BMC Plant Biology
|April 29, 2010
PubMed
Summary
This summary is machine-generated.

Tomato roots respond to localized nitrogen patches by altering gene expression and increasing nutrient uptake. This highlights the role of mycorrhizal symbiosis in nitrogen utilization within complex soil environments.

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Plant-Microbe Interaction: Transcriptional Response of Bacillus Mycoides to Potato Root Exudates

Published on: July 2, 2018

Area of Science:

  • Plant Biology
  • Soil Science
  • Molecular Biology

Background:

  • Nitrogen is crucial for plant growth but unevenly distributed in soil.
  • Solution culture studies oversimplify nutrient acquisition in complex soil.
  • Localized ammonium (15N) treatments simulated soil patches for tomato roots.

Purpose of the Study:

  • Investigate tomato root response to localized nitrogen enrichment.
  • Identify differentially expressed genes in roots after ammonium pulse.
  • Understand nutrient uptake regulation in heterogeneous soil.

Main Methods:

  • Applied 15N-labeled ammonium to discrete soil volumes around tomato roots.
  • Analyzed root and shoot 15N enrichment over time.
  • Performed transcriptome analysis 53 hours post-treatment.

Main Results:

  • Ammonium treatments increased soil ammonium and nitrate levels.
  • Roots and shoots showed sustained 15N uptake.
  • 585 genes were differentially regulated, including nitrogen metabolism, cell growth, and stress response genes.
  • Phosphate transporter expression indicated crosstalk between N and phosphate uptake, potentially via mycorrhizal symbiosis.

Conclusions:

  • Tomato roots exhibit a complex transcriptional response to localized nitrogen pulses.
  • Mycorrhizal symbiosis plays a key role in utilizing nitrogen patches.
  • This study provides insights into root adaptation in dynamic soil conditions.