Cutin is a waxy substance found in the cell walls of plants. It plays a crucial role in protecting plant tissues from water loss and environmental stress. By forming a barrier, cutin helps to prevent excessive evaporation and keeps the plant hydrated. This compound is primarily composed of long-chain fatty acids and is a key component of the cuticle, which is the outer layer of leaves and stems. The cuticle, enriched with cutin, also serves to shield plants from pathogens and harmful UV radiation, contributing to their overall health and resilience.