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Updated: Mar 19, 2026

Multipronged Phenotyping Approaches to Characterize Sugarcane Root Systems

Multipronged Phenotyping Approaches to Characterize Sugarcane Root Systems

Published on: August 17, 2022

Benchmarking electrical methods for rapid estimation of root biomass.

François Postic¹, Claude Doussan²

¹ARVALIS Institut du végétal, 75116 Paris, France ; UMR EMMAH, INRA, UAPV, Domaine Saint-Paul, Site Agroparc, 84914 Avignon, France.

|June 25, 2016

Summary

This study enhances root dry mass estimation using electrical capacitance. Optimized methods improve accuracy and efficiency for crop breeding programs facing climate change challenges.

Keywords:

Capacitance Contact electrode Electrical impedance spectrometry Root mass Terminal configuration Triticum durum Wheat

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Last Updated: Mar 19, 2026

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Area of Science:

Agricultural Science
Plant Biology
Biophysics

Background:

Climate change necessitates crop breeding strategies focusing on root traits.
Electrical capacitance offers rapid root trait phenotyping, correlating with root dry mass.
Current methods require improved robustness and efficiency for electrical variable-based estimation.

Purpose of the Study:

To enhance the robustness and efficiency of root dry mass estimation using electrical variables.
To benchmark different electrode configurations and electrical measurements for improved accuracy.
To evaluate the potential of electrical capacitance as a tool for crop screening in breeding programs.

Main Methods:

Measured electrical impedance spectra of wheat plants using various electrode configurations and stem contact methods.
Computed parallel capacitance and other electrical variables, evaluating their root dry mass estimation quality via a 'sensitivity score'.
Assessed the impact of different stem electrode types (clamp vs. needle) and frequencies on capacitance measurements.

Main Results:

Parallel capacitance at 116 Hz in a three-terminal configuration yielded the highest sensitivity score.
Using a clamp stem electrode did not significantly alter capacitance measurements.
In handheld LCR meter conditions, capacitance showed the highest sensitivity and determination coefficient (r² = 0.52) at 10 kHz.

Conclusions:

Benchmarking provides coherent practices for sensitive and robust root dry mass estimation.
Electrical capacitance is a valuable tool for screening crops based on root systems in breeding programs.
Optimized electrical methods enhance the utility of capacitance for crop improvement under environmental stress.