Deciduous plants shed their leaves during hot | vedclass

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Question

(B) $\Rightarrow$ The shedding of leaves by plants during hot summer or autumn is known as abscission.$\Rightarrow$ Anatomically,a specialized region

Vedclass · Accepted Answer

Dissolution of the middle lamella and primary cell walls in the abscission zone.

Vedclass · Answer

(B) $\Rightarrow$ The shedding of leaves by plants during hot summer or autumn is known as abscission.$\Rightarrow$ Anatomically,a specialized region called the abscission zone forms at the base of the petiole.$\Rightarrow$ The cells in this zone are thin-walled and lack secondary wall thickenings like suberin or lignin.$\Rightarrow$ During abscission,enzymes (such as cellulases and pectinases) dissolve the middle lamella and the primary cell walls between the cells of the abscission layer.$\Rightarrow$ As these cell walls break down,the structural connection between the leaf and the stem is lost,allowing the leaf to fall off easily due to wind or gravity.

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?

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