Question

What is the epidermal cell modification in plants which prevents water loss?

Answer 1

Bulliform cells

• Some modified epidermal cells present in the monocot leaves, which are large, empty and colourless are called bulliform cells.
• When these cells face water stress, they become flaccid and cause the leaves to curl inwards.
• This is done in order to prevent and reduce the water loss caused by transpiration.

Other epidermal cell modifications

• Epidermis have a covering of thick waxy layer called cuticle.
• Cuticle prevents water loss.
• Epidermis have hairs (epidermal hairs) on stems called trichomes which also helps in preventing water loss.