Table of Contents

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

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

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

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

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