write a short note on mesophyll
Answers
The mesophyll is the name given to two layers of cells inside of the plant's leaves. The first layer, located under the epidermis but above the second layer, is the palisade parenchyma cells. This layer is inundated with loads of chloroplasts, making it the layer most directly responsible for photosynthesis
Answer:
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Explanation:
In dorsiventral leaf, the ground tissue lying between upper epidermis and lower one is known as Mesophyll. It is differentiated into (a) Palisade Parenchyma (b) Spongy Parenchyma.
(a) Palisade Parenchyma: It consists of one to two or three layers of elongated cylindrical cells closely packed with their long axes at right angles to the epidermis. The cells contain numerous chloroplasts and manufacture sugar and starch in the presence of sunlight.
(b) Spongy Parenchyma: It consists of oval, rounded, irregular cells loosely arranged towards the lower epidermis enclosing numerous large intercellular spaces and air cavities. They fit closely around the vein or the vascular bundle. The cells contain few chloroplasts. Spongy cells help diffusion of gases through the empty spaces left between them. They manufacture sugar and starch to some extent only.
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