Read the following characteristics regarding a specific type of cells found in plants: (i) They are large, empty, and colourless cells. (ii) They are formed by the modification of adaxial epidermal cells along the veins in grasses. (iii) Changes in their turgidity cause the leaves to curl inwards to minimise water loss. Identify the specialised cells described above.

Step-by-step solution

The given characteristics describe bulliform cells. In grasses, certain adaxial epidermal cells along the veins modify themselves into large, empty, colourless cells called bulliform cells. When they are turgid, the leaf surface is exposed, and when flaccid due to water stress, they make the leaves curl inwards to minimise water loss. Subsidiary cells are specialised epidermal cells surrounding guard cells. Mesophyll cells form the photosynthetic ground tissue of leaves. Bundle sheath cells are layers of cells surr