HORTICULTURE

Detailed explanation-1: -Leaf cuticle-Leaves are covered with a waxy cuticle which also stops their cells from becoming infected. It is a strong barrier that pathogens find it hard to pass through.

Detailed explanation-2: -The desert agave, also called the century plant (Agave deserti), which grows in USDA plant hardiness zones 9a through 11a, has light gray or bluish foliage because of its waxy cuticle.

Detailed explanation-3: -In addition to preformed barriers, virtually all living plant cells have the ability to detect invading pathogens and respond with inducible defenses including the production of toxic chemicals, pathogen-degrading enzymes, and deliberate cell suicide.