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Related Experiment Video

Updated: Oct 12, 2025

RGB and Spectral Root Imaging for Plant Phenotyping and Physiological Research: Experimental Setup and Imaging Protocols

RGB and Spectral Root Imaging for Plant Phenotyping and Physiological Research: Experimental Setup and Imaging Protocols

Published on: August 8, 2017

Semifield root phenotyping: Root traits for deep nitrate uptake.

Tomke S Wacker¹, Olga Popovic¹, Niels A F Olsen¹

¹Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Copenhagen, Denmark.

Plant, Cell & Environment

|November 22, 2021

Summary

This summary is machine-generated.

Deep rooting winter wheat (Triticum aestivum) genotypes enhance nitrogen (N) uptake and reduce nitrate leaching. Specific deep root traits identified can predict N uptake, enabling breeding for improved crop nutrition and environmental benefits.

Keywords:

nitrogen isotope plant breeding plant roots semifield

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Area of Science:

Agricultural Science
Plant Physiology
Genetics

Background:

Nitrate leaching from agricultural soils is an environmental concern.
Deep-rooting winter wheat genotypes offer potential for reduced nitrate loss and increased nitrogen uptake.
Understanding the genetic basis of root traits influencing nitrogen acquisition is crucial.

Purpose of the Study:

To identify deep root traits correlated with deep nitrogen (N) uptake in winter wheat.
To estimate the genetic variation in root traits and deep 15N tracer uptake.
To assess the predictive power of root traits for deep N uptake.

Main Methods:

Winter wheat genotypes were grown in a semifield root-screening facility (RadiMax) over two years.
Minirhizotron root imaging was used to quantify root traits (depth, density, distribution, growth).
15N tracer was applied at 1.8m depth via subsurface drip irrigation, and N content in mature ears was analyzed.

Main Results:

Root traits predicted 14-24% of 15N tracer uptake variation across two years.
Both root traits and genotype significantly influenced tracer uptake.
Selected root traits, combined with genotype, explained 41-48% of the variation in 15N uptake, with one trait consistently mediating genotype effects.

Conclusions:

Deep root traits measurable from minirhizotron images can predict deep nitrogen uptake in winter wheat.
This indicates a strong potential for breeding winter wheat varieties with enhanced deep nitrogen uptake capabilities.
Developing such genotypes can contribute to more sustainable agriculture by improving nutrient use efficiency and reducing environmental losses.