upper epidermis

Example: Maize A transverse section passing through the midrib region of an iso-bilateral leaf (Maize) reveals the following structure. Epidermis is in two layers, one on each surface of the leaf. Both the epidermal layers are composed of compactly arranged, barrel shaped cells. Cuticle a..

Example: Sunflower A transverse section through the midrib region of a typical dorsi-ventral leaf (Sunflower) reveals the following structure. Epidermis is in two layers, one on each surface of the leaf. Both the layers are composed of compactly arranged, barrel-shaped cells. Intercellu..

Leaf Structure - Photosynthesis occurs only in the green parts of the plant. For efficient photosynthesis the leaf should be thin and have a large surface area. This helps in absorption of light and gaseous diffusion, and a means of preventing excessive water loss through stomata and epidermis..

. It has four cellular elements tracheids, tracheae, fibres and parenchyma of which only xylem parenchyma is living. Xylem tracheae (or vessels) are the most active water conducting elements. Based on the pattern of lignification, they can be distinguished into annular, spiral, scalariform, reticul..