Question

What causes abscission in plants?​

Answer 1

abscission is the shedding of various parts of an organism such as a plant dropping a leaf, fruit, flower or seed .ln zoology abscission is the international shedding of a body part

Answer 2

• Structural. In deciduous trees, an abscission zone, also called a separation zone, is formed at the base of the petiole. It is composed of a top layer that has cells with weak walls, and a bottom layer that expands in the autumn, breaking the weak walls of the cells in the top layer. This allows the leaf to be shed.