Write a short note on mesophyll.

Explanation

In Dicot leaf, the tissue present between the upper and lower epidermis is called mesophyll. It is differentiated into
(a) Palisade Parenchyma: They are found below the epidermis and are elongated. They have more number of chloroplasts and can take part in photosynthesis. The cells do not have inter cellular spaces.
(b) Spongy Parenchyma: They are found below the palisade parenchyma tissue. Cells are spherical or oval and are irregularly arranged. Cells have intercellular spaces and helps in gaseous exchange. In monocot leaves, mesophyll are present between both upper and lower epidermal layer. The cells are irregularly arranged with intercellular spaces. Mesophyll cells contain chloroplasts, to take part in photosynthesis.