HORTICULTURE

Detailed explanation-1: -A Permeable Cuticle, Not Open Stomata, Is the Primary Source of Water Loss From Expanding Leaves. High rates of water loss in young, expanding leaves have previously been attributed to open stomata that only develop a capacity to close once exposed to low humidity and high abscisic acid (ABA) levels.

Detailed explanation-2: -Thick waxy cuticle: The cuticle cuts down water loss in two ways: it acts as a barrier to evaporation and also the shiny surface reflects heat and so lowers temperature. Sunken stomata: Stomata may be sunk in pits in the epidermis; moist air trapped here lengthens the diffusion pathway and reduces evaporation rate.

Detailed explanation-3: -Transparent waxy cuticle – a protective layer that allows light to enter the leaf. It is waterproof in order to prevent water loss by evaporation.