Increased Cuticle Permeability Caused by a New Allele of - Enhances CO Uptake.

Carbon dioxide (CO) is an essential substrate for photosynthesis in plants. CO is absorbed mainly through the stomata in land plants because all other aerial surfaces are covered by a waxy layer called the cuticle. The cuticle is an important barrier that protects against extreme water loss; however, this anaerobic layer limits CO uptake.