Definitions for "ABSCISSION ZONE"
ab-SCISZ-on ZONE A region at the base of the petiole from which leaves shed. 546
The abscission zone is the area at the base of leaf's petiole, a fruit stalk, or a branch in which the separation (abscission) layer develops. The disintegration of this layer causes a leaf, fruit, or flower to fall from a plant. Abscisic acid is the plant hormone involved in this process.
Area at the base of a leaf petiole or peduncle of a square or boll where the plant structure separates during abscission.