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 ?
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.
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.
Cutting the twig from the tree stopped not only the growth process of the twig and leaves but also its ability to change the abscission layer between the twig and the petiole, which was necessary in order for the leaves to fall.
The following traits were recorded: length of the segment, diameter of the abscission layer on distal segments, and length of the pedicel on proximal fruit segments.
5 cm above the abscission layer, pushing the distal segment off.
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.
The "mortar" between the brick-like cells of the abscission layer has dissolved when the leaves have turned colors, leaving the leaf precariously supported by the veins of the stem.
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.
The construction of a wall called the abscission layer, where the leaf stem (petiole) joins the twig, first inhibits and finally cuts off the flow of sugars from the leaf to the remainder of the plant.
Therefore, the application of plant growth regulators can control the hormone balance at the abscission layer, reducing or retarding the early fall of fruit, and harvest losses (PRIMO et al.
The scope of works covered by the contract involves executing the foundation of broken aggregate thickness of 10 cm, abscission layer with a thickness of 10 cm, the culvert with a length of 6.