Question
List some adaptations found in desert plants to reduce transpiration.
✓
Answer
(i) Leaves with thick cuticle - Some desert plants develop a thick waxy cuticle over the epidermis to reduce the loss of water by transpiration.
(ii) Reduced number of stomata - These plants have few stomata and concentrated on the underside of leaves to avoid direct sunlight.
(iii) Presence of epidermal hair - In some plants like cucurbits, leaf surface may be covered by thick coating of epidermal hairs to reduce transpiration.
(iv) Presence of sunken stomata - The stomata of leaves in dry environment sink into the leaf to reduce the surface area of the pores which further reduces rate of transpiration.
(v) Leaves modified into spines - In cactus, leaves are modified into spines to reduce surface area for transpiration, while their stem performs photosynthetic functions.
(ii) Reduced number of stomata - These plants have few stomata and concentrated on the underside of leaves to avoid direct sunlight.
(iii) Presence of epidermal hair - In some plants like cucurbits, leaf surface may be covered by thick coating of epidermal hairs to reduce transpiration.
(iv) Presence of sunken stomata - The stomata of leaves in dry environment sink into the leaf to reduce the surface area of the pores which further reduces rate of transpiration.
(v) Leaves modified into spines - In cactus, leaves are modified into spines to reduce surface area for transpiration, while their stem performs photosynthetic functions.
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