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.