noun[mass noun] Botany
The natural detachment of parts of a plant, typically dead leaves and ripe fruit: leaf abscission in trees [as modifier]: abscission layer
More example sentences
- The presence and balance of plant hormones have been shown to affect abscission of leaves, flowers, and immature and mature fruit.
- Ethylene is involved in many biological processes, like fruit ripening, flower and leaf abscission, senescence, many stress acclimations, and growth.
- They produce numerous biological effects including promotion of leaf senescence and abscission, stomatal closure, inhibition of root growth, and germination of non-dormant seeds.
early 17th century: from Latin abscissio(n-), from abscindere, from ab- 'off' + scindere 'to cut'.
- More example sentences
- The seeds and any abscised siliques were collected from plastic collars around the plant.
- Abscission dynamics was obtained by plotting abscised fruitlets collected from the ground at 1 d intervals and expressed per tree.
- In the short term, stomata usually open again within a few days when water stress is still imposed. ‘Xeromorphic’ leaves are often the first to be abscised after rewatering and new leaves are formed by bud break.
Definition of abscission in:
- The US English dictionary