Deciduous plants shed their leaves during hot summer or in autumn. This process of shedding of leaves is called abscission. Apart from physiological changes, what anatomical mechanism is involved in the abscission of leaves ?

$\Rightarrow$ To shed leaves in season of hot summer of autumn by plants is called abscission.

$\Rightarrow$ As per structure internal cells of falling off region are thin walled and without thickening of suberin and lignin.

$\Rightarrow$ At the time of shedding of leaves midsepta between cells of two mid layers gets dissolved but primary wall remains as it is (unbroken). Midsepta and wall of near by cells, primary wall get, dissolved. As a result deciduous level in all cells of mid layer get dissolved completely.

$\Rightarrow$ Hence, organs of plant get separated. Means wherever there is rain fall or windy, leaves get separated from the plant.