7-6 Adaptation of Xerophytes in Reducing Transpiration Rates (Cambridge AS A Level Biology, 9700)

Xerophytes are plants that live in dry environments. They are often exposed to low humidity environment, thus may undergo excessive transpiration. So, in order to reduce transpiration rates, xerophytes have developed 3 methods of surviving in these harsh conditions. 1. 1:05 Thick Cuticle 2. 2:24 Smaller Surface Area of Leaf 3. Reducing the steepness of the water vapour concentration gradient by: a. 4:55 Trichomes/Leaf Hairs b. 5:58 Sunken Stomata c. 7:11 Rolled up leaves