Reproduction and Modification in Plants | Term 1 Unit 5 | 7th Science - Modifications of Leaf | 7th Science : Term 1 Unit 5 : Reproduction and Modification in Plants
Chapter: 7th Science : Term 1 Unit 5 : Reproduction and Modification in Plants
Modifications of Leaf
Modifications of Leaf
Plants have changed themselves to
adapt to the environment they grow. One of them is the modification of leaves. Leaves of
several plants get modified into different form based on the purpose and
environment
i. Spines:
Leaves are reduced to spines, and the stem is modified into green succulent
part to perform photosynthesis. Eg : Opuntia.
ii. Tendrils: In
climbers, the leaf of plant would be modified into elongated structure to help
the plants climb efficiently.
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Gloriosasuperba – Leaf tips are modified into tendrils
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Pisumsativum (pea) –Terminal leaflets are modified
into tendrils.
iii. Phyllode: In
Acacia auriculiformis, petioles expand to form leaf like structure. They carry
out the function of leaf (Photosynthesis)
iv. Traps:
Plants that grow in nitrogen deficient places adapt themselves well to get it.
In Nepenthes, the leaves are
modified into a flask like structure, which is used to attract insects and
other tiny animals. The inner wall of the leaf secretes digestive enzymes that
help to digest the insects and extract the nitrogen needed for the plant. Eg: Nepenthes.
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