Definitions
from The Century Dictionary.
- noun In botany, a hydrostatic pressure exerted in plants, which manifests itself by causing, especially in the spring, a more or less copious flow of watery fluid from the cut surface of a part of the stem which is directly connected with the root.
Etymologies
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Examples
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Through this peculiarity the water supply within the plant is regulated and the danger avoided that any water should penetrate the surrounding tissue in consequence of strong root-pressure, -- which would naturally obstruct the vital function of the entire leaf.
At the Deathbed of Darwinism A Series of Papers Eberhard Dennert
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The water which is forced upward by the root-pressure of the plant is naturally conveyed through the vascular fibres into the leaves and at every hydathode the superfluous water oozes out in drops, a phenomenon which one can also very nicely observe e.g. on the "Lady's cloak" (Alchemilla vulgaris) of the German flora.
At the Deathbed of Darwinism A Series of Papers Eberhard Dennert
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Even if the hydathode is treated with sublimate solution, all the conditions for mechanical filtration still remain: the earth has moisture which can be taken up by the roots so that root-pressure still exists.
At the Deathbed of Darwinism A Series of Papers Eberhard Dennert
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