Answer:
he process of shedding
of leaves during hot summer or in autumn by deciduous plants is t known as
abscission. Anatomically, the cells of abscission zone are thin-walled and
without deposition of lignin or suberin.
At the time of
abscission, the middle lamella may dissolve between the cells of two
middlelayers but the primary wall remain intact. The middle lamella as well as
the primary walls ofthe adjacent cells is dissolved. Ultimately the whole cells
of middle layer found in theabscission layer gets dissolve completely.
Thus, there
is separation of plant organ, i.e., leaf from the plant, wherever there is
rainfall or wind,
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