Question

In mesophytes, maximum transpiration occurs through

• A. Cuticle
• B. Lenticel
• C. Stomata
• D. Hydathodes

Answer 1

The correct option is C Stomata

In mesophytes, over 90 percent of transpiration occurs through stomata in leaves and is called as foliar transpiration. A minor amount of transpiration occurs through bark and is called as bark transpiration. Cuticular transpiration is loss of water in vapour form from the general surface.

Cuticular transpiration is appreciable only in case of the cuticle is thin as in mesophytic plants growing in humid area. Commonly it is 3 to 10 percent of total.

Lenticular transpiration is loss of water in vapour form from lenticel or aerating pores in the bark of stems. It is hardly 0 to 1 percent of the total transpiration.