Leaf Venation, Reticulate Venation & Parallel Venation

BY Team Aakash Byju's

Explained:

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The leaf is the green, flat structure of a plant that prepares food for the plant. A leaf has different parts. These include the petiole, lamina and veins.

Leaf

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The small lines present on the lamina of the leaf are known as veins. They provide strength to the leaf.

Veins

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Venation

The arrangement of veins in a leaf is known as leaf venation. Leaf venation is two types. These include reticulate venation and parallel venation.

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In this type of venation, one primary vein is present in the middle of the lamina of the leaf. It is called the midrib.

Reticulate Venation

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Smaller veins emerge from the midrib. All the veins together form a network-like structure. This type of venation is known as reticulate venation.

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– We find reticulate    venation in dicot plants    like beans, tamarind,    hibiscus, rose, etc. – Plants with a taproot    system have reticulate   venation.

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In this type of venation, all veins are parallel to each other. All the veins start from the leaf base and end at the tip of a leaf.

Parallel Venation

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All the veins are equal in length and have equal thickness. This type of venation is known as parallel venation.

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– We find parallel    venation in monocot    plants like grass, rice,    wheat, maize, etc. – Plants with fibrous    roots have parallel    venation.

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Leaf venation gives support and strength to the leaf.

Functions of Venation

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Veins transport water and mineral nutrients from stem to leaf.

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Veins transport food materials (prepared during photosynthesis) from leaf to stem.

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Leaf venation helps to expand the leaf, so that leaf can get sufficient sunlight to prepare food.