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Q.
In dorsiventral leaves, leaf mesophylls are composed of
Anatomy of Flowering Plants
Solution:
Mesophyll tissue is the ground tissue of leaves. It is differentiated into palisade and spongy parenchyma in dorsiventral leaf. The palisade cells occur towards the adaxial side. They are columnar cells with very few intercellular spaces and remain arranged more or less at right angles to the upper epidermis. Chloroplasts are abundant (more light reaches this layer hence must take maximum use of light energy for photosynthesis) and occur particularly along the radial walls of the cells. The spongy parenchyma occurs towards the lower epidermis. The cells are loosely arranged with conspicuous intercellular spaces so that a large part of their surface is exposed to the gases in the intercellular spaces. The chloroplasts are fewer here (less light reaches this layer for photosynthesis).