Cutin is a waxy substance found in the cell walls of plants. It plays a crucial role in protecting plants from water loss and environmental stress. By forming a barrier, cutin helps to prevent excessive evaporation and shields plants from pathogens and harmful substances. 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, made up of cutin and other waxes, contributes to the overall health and survival of plants by maintaining moisture and providing a defense against pests.