In trees,such as the horse chestnut,the abscission of leaves and fruits in the fall is mediated by ____.

Name: In trees,such as the horse chestnut,the abscission of leaves and fruits in the fall is mediated by ____.
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Ethylene is a plant hormone that mediates the abscission (shedding) of leaves and fruits in trees like the horse chestnut. It plays a key role in the process by weakening the cell walls in the abscission zone, leading to the detachment of leaves and fruits.

In Trees,such as the Horse Chestnut,the Abscission of Leaves and Fruits