abscission

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Related to abscissions: abscission layer

ab·scis·sion

(ab-si'shŭn), Avoid the mispronunciation ab-si'zhŭn.
Cutting away.
[L. ab-scindo, pp. -scissus, to cut away from]

abscission

/ab·scis·sion/ (-sĭ´zhun) removal by cutting.

abscission

(ăb-sĭzh′ən)
n.
The act of cutting off.

abscission

[absish′ən]
Etymology: L, abscinere, to cut away
the process of cutting away, as in corneal abscission, removal of the prominence of the cornea.

abscission

An antiquated term for cutting; in modern medicine it has been replaced by the term excision, see there.

ab·scis·sion

(ab-sish'ŭn)
Cutting away.
[L. ab-scindo, pp. -scissus, to cut away from]

abscission

The act of cutting off.
Abscissionclick for a larger image
Fig. 4 Abscission . Abscission layer in a leafstalk.

abscission

the process by which plant organs are shed. This process occurs in the stalks of unfertilized flowers, in ripe fruits and in the base of the petiole of deciduous leaves in autumn, or in diseased leaves at any time. It is due to the formation of an abscission layer of thin-walled cells in the stalk base which rupture under strain produced by e.g. wind. A layer of cork forms beneath the abscission layer to seal the plant surface. Abscission is controlled by plant hormones present: a low concentration of AUXIN, high amounts of ETHYLENE, and (in some plants) a high concentration of ABSCISIC ACID all stimulate production of the abscission layer.

ab·scis·sion

(ab-sĭ'zhŭn)
Cutting away.
[L. ab-scindo, pp. -scissus, to cut away from]

abscission

removal of a part or growth by cutting.
References in periodicals archive ?
This pattern of abscission may be due to the amount of light available at each canopy region since irradiance is said to decrease with depth into the canopy [15].
The high positive correlation between flowers and harvestable pods on one hand and between seed yield and the number of flowers, harvestable pods, weight per seed and seeds per pod on the other, suggests that abscission of reproductive organs could reduce seed yield.
This study has shown that reproductive abscission exists in mungbean.
Izquierdo JA and GL Hosfield A Collection Receptacle for Field Abscission Studies in Common Bean.