Write Dicotyledonous and Monocotyledonous Leaves.

Question: 

Write Dicotyledonous and Monocotyledonous Leaves.

Answer:

Dicotyledonous and Monocotyledonous Leaves

Dicot Leaf

Dicotyledonous leaf shows reticulate venation.

• Lamina consists of epidermis, mesophyll and vascular system.
• The epidermis is covered by cuticle and stomata; abaxial epidermis (lower surface) possesses more stomata than adaxial epidermis (upper surface). Sometimes adaxial epidermis lack stomata.
• Mesophyll, (parenchymatous cells) composed of the palisade and spongy parenchyma is present in between the adaxial epidermis and abaxial epidermis.
• The chloroplasts present in mesophyll perform photosynthesis in leaves.
• Vascular bundles are surrounded by bundle sheath cells and form the veins and midrib.

Monocot Leaf

Monocotyledonous leaves are characterized by parallel venation. The anatomy of a monocot leaf includes:

• Both adaxial epidermis and abaxial epidermis bear stomata.
• There is no differentiated palisade and spongy parenchyma of the mesophyll.
• Bulliform cells are present, which is developed from adaxial epidermal cells and the veins.
• Bulliform cells are large, void cells which are responsible for the curling of leaves for minimal loss of water.