Internal Structure of Monocot Leaf Notes

This article we will discuss about Internal Structure of monocot leaf

The transverse section of a monocot leaf reveals the following structures

Epidermis

• A monocot leaf is generally isobilateral leaf
• It has upper and lower epidermis

I) Upper epidermis

• Outermost layer present on the upper side of the leaf
• Made up of a single layer of parenchymatous
• Cuticle layer is present on the upper epidermis
• Stomata is present on both upper and lower epidermis
• Some parenchymatous cells on the upper epidermis are large and thin-walled are known as bulliform cells
• Bulliform cells make the leaves curl during water stress and helps to reduce water loss

II) Lower epidermis

• Outermost layer present on the lower side of the leaf
• Single layer, parenchymatous & covered with cuticle
• Number of stomata is equal on both the epidermis
• Stomata is surrounded by dumb bell shaped guard cells
• Function of epidermis: protective layer, exchange of gases and facilitates the transpiration

Mesophyll tissue

• Present between the upper and lower epidermis, there is an entire mass of ground tissue called mesophyll
• Unlike dicot leaf, no differentiation is observed in the mesophyll as palisade and spongy parenchyma
• The cells are made up of parenchyma and are irregularly arranged with intercellular spaces
• These cells contain chloroplasts and can take part in the process of photosynthesis

Vascular bundle

• A large number of vascular bundles are present
• Each vascular bundle consists of xylem and phloem
• Vascular tissues are surrounded by a sheath of cells made up of parenchyma called bundle sheath
• Vascular bundle is conjoint, collateral and closed
• Functions of V.B: conduct water and food materials

 

Internal Structure of Dicot Stem Notes

Internal Structure of Monocot Stem Notes

Internal Structure of Dicot Root Notes

Internal Structure of Monocot Root Notes

Internal Structure of Dicot Leaf Notes

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