abscission layer


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Related to abscission layer: abscission zone

abscission layer

[ab′sizh·ən ‚lā·ər]
(botany)
A zone of cells whose breakdown causes separation of a leaf or other structure from the stem.
References in periodicals archive ?
Association between Grain Shattering Habit and Formation of Abscission Layer Controlled by Grain Shattering gene sh-2 in Rice(Oryza sativa L.).
Ethylene stimulates softening of fruits and the formation of an abscission layer in the stem.
It is a high yield plant with a complete abscission layer originating from 'Nagdong' is the main variety cultivated in our region and considered as positive and negative with WBPH resistance.
The abscission layer in Cannabis glandular trichomes is best observed in sifted hashish preparations in which gland heads and gland stalks appear as separate entities with the head cells broken away cleanly at the abscission layer.
As the resistance to abscission, this variable was also directly associated with the development of the abscission layer (DENG et al., 2007b) and represents one of the main ways whereby Postharvest quality of table grapes is lost (DENG et al., 2007a; BRACKMANN et al., 2000).
As the cells in the abscission layer become drier and more cork-like, it creates a barrier to the transport of minerals and other substances into the leaf.
Seed shattering in buckwheat is associated with the presence of an abscission layer across the pedicel (Oba et al., 1998).
Instead of deadheading roses by cutting back to the first five-leaflet leaf as standard practice dictates, England's Royal Horticultural Society has found that snapping off the bloom at the abscission layer (where the stem is swollen just beneath the flower) actually produces more new flowering shoots than the old method.
The distal fruit segments usually detach from the proximal fruit segments through an abscission layer and can be dispersed independently from them.
Tiny cells at the base of each leaf, known as the abscission layer, begin to dry out, chlorophyll dissipates and the photosynthesis process comes to a halt.
As fall approaches, a wall of brick-like cells (the abscission layer) develops across the stem of the leaf, and the veins start to clog up.
Using a scanning electron microscope, Tucker and colleagues examined the area of cells on the abscission layer, where stem and leaf perform the delicate biochemical surgery.