Question

Dorsiventral leaf is identified by the presence of

• A. Stomata on both the epidermis
• B. Stomata mainly present on the lower epidermis
• C. No stomata on the epidermis
• D. Sunken stomata on the upper epidermis

Answer 1

The correct option is B Stomata mainly present on the lower epidermis

In dorsiventral leaf, epidermis is in two layers, one on each surface of the leaf. Both the layers are composed of compactly arranged, barrel-shaped cells. Intercellular spaces are absent. A cuticle surrounds both the layers. Multicellular hairs called as trichomes are present on both the layers. Stomata occur only in the lower epidermis. This condition is described as hypostomatic.

Mesophyll is the ground tissue that occurs between the two epidermal layers. It is exclusively composed of chlorenchyma cells. The mesophyll is characteristically differentiated into two regions, namely an upper palisade parenchyma and a lower spongy parenchyma. Thus, option B is correct.