Knowra Abscission Abscission Abscission is the regulated separation of a plant organ from the rest of the plant, usually at a specialized layer of cells. It sheds leaves, flowers, fruits, and other organs.
Abscission zone : A specialized band of plant cells where an organ separates from its parent structure. This is the tissue where abscission is prepared and carried out.
Plant hormone : A signaling molecule produced by plants that regulates growth, development, and environmental responses. Abscission depends on interactions among several plant hormone signals.
Fruit drop : The detachment and fall of developing or mature fruit from a plant. Fruit drop is a visible outcome of abscission that can reduce crop yield.
Plant senescence : The age-related deterioration of plant cells, tissues, or organs. Senescence is aging; abscission is the separation that may follow it.
Cell wall : A structural layer outside the plasma membrane that gives plant cells strength and shape. Abscission requires enzymes to loosen or dissolve cell walls between neighboring cells.
Plant development : The processes through which plants grow, form organs, and progress through life stages. Organ shedding is coordinated with the plant’s developmental stage.
Fruit thinning : The removal of some developing fruits to improve the size or quality of those that remain. Growers can manage abscission to reduce fruit load and shape crop quality.
Organ ablation : The deliberate removal or destruction of an organ or tissue, often in an experiment. Ablation removes tissue through intervention rather than regulated natural separation.
Ethylene : A gaseous plant hormone that regulates processes including fruit ripening, senescence, and organ shedding. Ethylene commonly promotes separation in responsive abscission zones.
Leaf senescence : The regulated aging of a leaf, involving changes in metabolism and the recovery of nutrients. Senescence often precedes leaf abscission, though the two processes are distinct.
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