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Internal Structure of Monocot Stem Notes

This article we will discuss about Internal Structure of Monocot Stem

The transverse section of a monocot stem reveals the following structures

Epidermis is a outermost layer and made up of parenchymatous cells
Cuticle is a protective layer, covers this layer
Trichomes or hairs are lacking
Epidermis has following functions
- Minimize the rate of transpiration
- Protects from mechanical injury
- Prevents the entry of harmful organisms
- Helps in the exchange of gases through stomata

This layer present just below the epidermis and multi-layered of sclerenchyma cells
Hypodermis has following functions: helps in mechanical support

Its present below the hypodermis and made up of rounded cells of parenchyma cells
There is no differentiation of general cortex, endodermis, pericycle, pith, and rays
In some grasses, wheat etc. the central portion of ground tissue becomes hollow is called pith cavity
Ground tissue has following functions: Storage of food

Vascular bundles are irregularly scattered in the ground tissues is called atactostele
These are conjoint, collateral, and closed vascular bundle
Vascular bundles in the peripheral region are smaller in size and compactly arranged
Vascular bundles in the central region are larger in size and widely placed
Vascular bundles oval in shape and surrounded by a sheath of sclerenchymatous tissue is called bundle sheath
Vascular bundle consists of xylem and phloem
Ground tissue has following functions: conduction of water and food materials

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