First slide

Anatomy of Dicotyledonous and Monocotyledonous Plants

Question

Bulliform cells are

Easy

A

large, empty and colourful.
B

present in all isobilateral and few dorsiventral leaves.
C

curled outward due to excess water when they are flaccid.
D

present on adaxial epidermis of leaves.

Solution

In grasses, certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless cells. These are called bulliform cells. When the bulliform cells in the leaves have absorbed water and are turgid, the leaf surface is exposed. When they are flaccid due to water stress, they make the leaves curl inwards to minimise water loss.

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