osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves.
Pressure produced in the roots of plants, causing exudation of sap from cut stems and guttation of water from leaves. The pressure is generated by the concentration of solutes in the xylem of the root and stem, which in turn causes water to move into the xylem by osmosis.
- Root resection
root resection n. See apicoectomy.
noun, Plant Pathology. 1. a symptom or phase of many diseases of plants, characterized by discoloration and decay of the roots. 2. any disease so characterized.
noun 1. a part of the body of a plant that develops, typically, from the radicle and grows downward into the soil, anchoring the plant and absorbing nutriment and moisture. 2. a similar organ developed from some other part of a plant, as one of those by which ivy clings to its support. 3. any […]
[roots] /ruts/ noun 1. a machine for compressing or evacuating air or gas by the rotation of a meshing pair of lobed wheels in a closely fitting case.