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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...
Key Elements for Plant Nutrition02:35

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...
Overview of Nitrogen Metabolism01:20

Overview of Nitrogen Metabolism

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 nitrogen...

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Updated: May 14, 2026

Study on the Metabolism of Six Systemic Insecticides in a Newly Established Cell Suspension Culture Derived from Tea (Camellia Sinensis L.) Leaves
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Study on the Metabolism of Six Systemic Insecticides in a Newly Established Cell Suspension Culture Derived from Tea (Camellia Sinensis L.) Leaves

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Transcriptome Analysis Revealed the Mechanism of Nitrate Absorption in Tea Plants.

Weiwei Deng1, Qiangqiang Xiong1,2, Kang Wei2

  • 1State Key Laboratory of Tea Plant Germplasm Innovation and Resource Utilization, Anhui Agricultural University, Hefei 230036, China.

Plants (Basel, Switzerland)
|May 13, 2026
PubMed
Summary

Tea plants show distinct nitrate absorption strategies based on cultivar and concentration. This study identifies key genes and transcription factors for improving nitrogen use efficiency in tea, crucial for sustainable agriculture.

Keywords:
Camellia sinensisgene expressionnitrate uptaketranscriptome

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Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples
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Last Updated: May 14, 2026

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Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples

Published on: September 28, 2022

Area of Science:

  • Plant Physiology
  • Molecular Biology
  • Agricultural Science

Background:

  • Nitrate is vital for tea plant growth and quality, but nitrogen use efficiency (NUE) varies significantly among cultivars.
  • Understanding nitrate absorption kinetics and regulatory networks is crucial for optimizing tea production.

Purpose of the Study:

  • To systematically analyze nitrate absorption kinetics and genome-wide transcriptional responses in two contrasting tea cultivars under varying nitrate conditions.
  • To identify key genes and regulatory pathways involved in nitrogen utilization for sustainable tea cultivation.

Main Methods:

  • Utilized 15N isotope labeling and transcriptome sequencing to assess nitrate uptake and gene expression.
  • Compared absorption rates and molecular responses between 'Longjing 43' and 'Zhongming 6 hao' cultivars.
  • Functionally validated the role of the CsNiR gene in nitrate metabolism.

Main Results:

  • 'Zhongming 6 hao' showed higher nitrate absorption at low concentrations; 'Longjing 43' performed better at high concentrations.
  • Coordinated regulation of photosynthesis and nitrogen metabolism pathways was observed in both cultivars.
  • Identified 14 nitrogen metabolism genes and 64 differentially expressed transcription factors (e.g., MYB, NAC, LBD).
  • Silencing of CsNiR reduced nitrite reductase activity, confirming its positive regulatory role.

Conclusions:

  • Significant differences in nitrate absorption strategies exist between tea cultivars.
  • Identified candidate genes and transcription factors, including CsNiR, for enhancing nitrogen use efficiency in tea breeding.
  • Provides a framework for developing sustainable tea production practices through genetic improvement.