Monitoring of plant water uptake by measuring root dielectric properties on a fine timescale: diurnal changes and response to leaf excision.

The F tests showed that the slope of ΔC R– ΔT regression line for pea was marginally significantly ( p = 0.08) different from those of the other two species, whereas the same comparison proved to be highly significant ( p < 0.01) for the ΔG R –ΔT regression line.

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D R showed a decreasing trend for plants exposed to 6-day darkness, whereas it was increased markedly by decapitation, indicating altered root membrane structure and permeability, and a modified ratio of apoplastic to cell-to-cell water and current pathways.

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It exhibited an increasing trend for several plants, including the controls, but a decreasing trend when the 6-day dark treatment was applied (DC-4 and DC-6).

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