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Related Concept Videos

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Related Experiment Video

Updated: Mar 6, 2026

RGB and Spectral Root Imaging for Plant Phenotyping and Physiological Research: Experimental Setup and Imaging Protocols
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Imaging Nutrient Distribution in the Rhizosphere Using FTIR Imaging.

Tiffany Victor1, Natalie Delpratt2, Sarah Beth Cseke3

  • 1Department of Chemistry, Stony Brook University , Stony Brook, New York 11794, United States.

Analytical Chemistry
|March 7, 2017
PubMed
Summary

Fourier transform infrared imaging (FTIRI) visualized nutrient flow in plant-fungi symbiosis. This method revealed fungi actively transport nitrate to poplar roots and consume sucrose, enhancing nutrient sharing in the rhizosphere.

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Area of Science:

  • Plant-microbe interactions
  • Rhizosphere ecology
  • Biogeochemical cycling

Background:

  • Symbiotic associations in the rhizosphere are crucial for nutrient exchange between plants and microorganisms.
  • Understanding nutrient fluxes provides insight into molecular dynamics of nutrient transport.
  • Current methods lack the resolution to visualize and quantify these dynamic nutrient flows.

Purpose of the Study:

  • To develop and apply a novel Fourier transform infrared imaging (FTIRI) technique for visualizing and quantifying nutrient distribution in the plant rhizosphere.
  • To investigate the symbiotic nutrient exchange between Populus tremulodes seedlings and the mycorrhizal fungus Laccaria bicolor.

Main Methods:

  • Poplar seedlings were grown on a thin, nutrient-enriched Phytagel matrix.
  • Fourier transform infrared imaging (FTIRI) was used to measure nutrient distribution at a pixel-to-pixel level.
  • Calibration curves were generated to quantify nitrate concentration based on FTIR spectra.

Main Results:

  • FTIRI successfully visualized nitrate distribution in the poplar rhizosphere.
  • Nitrate concentration was five times higher near mycorrhizal roots compared to the bulk rhizosphere.
  • Sucrose, a carbon source, was depleted around the fungi, indicating uptake and consumption.

Conclusions:

  • This study demonstrates FTIRI's capability to visualize and quantify nutrient availability in mycorrhizal interactions.
  • Fungi actively acquire and transport nitrate towards plant roots.
  • The findings highlight the potential of FTIRI for studying nutrient flow in diverse biological systems.