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Root Electrical Capacitance Can Be a Promising Plant Phenotyping Parameter in Wheat
Imre Cseresnyés1, Klára Pokovai1, Judit Bányai2
1Institute for Soil Sciences, Centre for Agricultural Research, ELKH, Herman Ottó út 15, H-1022 Budapest, Hungary.
Plants (Basel, Switzerland)
|November 11, 2022
Summary
Root electrical capacitance (CR*) effectively measures wheat plant nutrient and photosynthate supply at flowering. This non-destructive method aids in predicting grain yield and improving crop management.
Area of Science:
- Plant Physiology
- Agricultural Science
- Crop Phenotyping
Background:
- Root electrical capacitance (CR*) is hypothesized to reflect stem properties.
- Assessing CR* at flowering offers potential for whole-plant phenotyping.
Purpose of the Study:
- To evaluate the efficiency of measuring CR* at flowering for whole-plant phenotyping in wheat.
- To correlate CR* with plant traits and yield components.
Main Methods:
- Field experiments with five wheat cultivars over two years.
- Linear regression analysis correlating CR* with plant size, flag-leaf traits, and yield components.
- Analysis at both plant and plot scales.
Main Results:
- CR* showed strong positive correlations with flag leaf chlorophyll and grain mass at the plant scale (R2: 0.55–0.74).
- At the plot scale, CR* strongly correlated with leaf area index (LAI) × SPAD values (R2: 0.86–0.99).
- CR* indicated total plant nutrient and photosynthate supply, influenced by root capacity and impacting yield.
Conclusions:
- CR* measurement is suitable for evaluating root size and functional intensity.
- The capacitance method enables non-destructive whole-plant phenotyping.
- CR* can estimate traits linked to nutrient supply, predict grain yield, and enhance crop management and genetic improvement.
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