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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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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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  11. Different Nitrogen Uptake Patterns Of Plant And Soil Microorganisms In The Forest-grassland Transition Zone On The Loess Plateau.

Different nitrogen uptake patterns of plant and soil microorganisms in the forest-grassland transition zone on the Loess Plateau.

Lina Wang1, Xu Deng1, Ying Zhou2

  • 1College of Forestry, Northwest A&F University, Yangling, Shaanxi, China.

Frontiers in Plant Science
|February 5, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Plants and microorganisms alleviate nitrogen competition by utilizing different nitrogen forms, demonstrating niche complementarity. This finding is crucial for understanding vegetation dynamics and restoration in nitrogen-limited ecosystems.

Area of Science:

  • Ecology
  • Plant Biology
  • Soil Science

Background:

  • Nitrogen (N) competition between plants and microorganisms is significant in N-limited regions.
  • Niche complementarity, where species utilize resources differently, may alleviate this competition.

Purpose of the Study:

  • To investigate if plants and microorganisms achieve niche complementarity by differential uptake of inorganic nitrogen (N) forms.
  • To quantify N uptake rates of plants and microorganisms in various stands in the forest-grassland transition zone.

Main Methods:

  • A 15-day 15N tracer study using 15NH4NO3 was conducted in situ.
  • Uptake rates of plants and microorganisms were measured in pure stands (Hippophae rhamnoides, Pinus tabuliformis), a mixed stand, and an Artemisia gmelinii grassland.
Keywords:
15N tracerforest–grassland transition zonemicroorganismsniche complementarity

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Main Results:

  • Hippophae rhamnoides and Artemisia gmelinii preferred NO3-, while Pinus tabuliformis preferred NH4+.
  • Mixed afforestation significantly reduced NH4+ and NO3- uptake rates in H. rhamnoides.
  • Differential N preferences between plants and microorganisms were observed in pure stands but not in mixed stands.

Conclusions:

  • Niche complementarity through distinct N form preferences can effectively alleviate N competition.
  • Plant and microbial N uptake patterns exhibit plasticity, offering insights for vegetation restoration strategies on the Loess Plateau.
nitrogen uptake
plants