Deciduous plants shed their leaves durin | Class 11 Biology Chapter Anatomy of Flowering Plants, Anatomy of Flowering Plants NCERT Solutions

Question:

Deciduous plants shed their leaves during 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.

Answer:

Anatomical mechanism that are involved in abscission of leaves are:

Structural: In deciduous trees, an abscission zone also known as separation zone which is formed at the base of the petiole. It is composed of top and bottom layer. The cells in the top layer have weak cell walls and the bottom layer expand in winter and break the cell walls of the top layer, which results in shedding of leaves.
Chlorophyll is a very important part of the plant that helps in absorption of sunlight for photosynthesis. Thus loss of chlorophyll may also results in abscission process.
Abscisic acid hormone is also responsible for abscission.

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Welcome to the NCERT Solutions for Class 11 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 0 , Question 2: Deciduous plants shed their leaves during summer or in autumn. This process of shedding of leaves is....

Deciduous plants shed their leaves durin | Class 11 Biology Chapter Anatomy of Flowering Plants, Anatomy of Flowering Plants NCERT Solutions

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