Question

Describe the internal structure of a dorsiventral leaf with the help of labelled diagrams.

Answer 1

Dorsiventral leaves are present in dicot plant and have three main parts.

1. Epidermis -The outermost covering of the leaf on the upper side called adaxial epidermis and on the lower side, it is known as the abaxial epidermis. A waxy thick layer cuticle is present and distinct. Stomata are higher on the abaxial epidermis and either lower or absent on adaxial epidermis.
2. Mesophyll-The mesophyll is present below the epidermis and is composed of parenchyma which has chlorophyll and divided into palisade parenchyma present at the upper side while spongy parenchyma present at the lower side and contains a large number of intercellular space.
3. Vascular bundles-These are surrounded by thick bundle sheath cells and can be seen in veins and midrib. These are distinct in size due to reticulate venation.