What are the adaptations of leaf for photosynthesis?

Answer 1

1. Its surface is large,broad,wide to provide even larger surface area for trapping light energy. And as light energy increases, so does photosynthesis.

2. The leaf's underneath surface is covered with millions of stomata, for rapid gas exchange. Rapid gas exchange, more carbon dioxide absorbed, more photosynthesis.

3. A green pigment(chlorophyll) is present in the leaf to increase light absorption ad thus rate of photosynthesis increases.

4. The leaf has large networks of vascular bundles to richly supply the leaf with water(xylem) and transport food to other parts of the plant(phloem). More of water slightly increases rate of photosynthesis. hi

Answer 2

Leaves have stomata - a stoma is formed by two kidney bean-shaped cells with the concave sides facing each other. These cells react to heat by closing when it's too hot and preventing the leaf from drying out. The main function of the stomata is gas exchange - they allow carbon dioxide to enter the leaf, since the cuticle is nearly impermeable.

Most (if not all) leaf cells also have chloroplasts - the organelle responsible for the green colour of leaves. Chloroplasts contain chlorophyll, a pigment molecule that absorbs light energy (photons) which cause a chain of electron excitation.

Most plants will orient their leaves to have the adaxial (top) surface getting the maximum amount of solar radiation. This is probably mediated by a combination of receptors and signalling.