In aerial parts of the plant the outer wall of the epidermis is usually covered by a waxy cuticle that prevents desiccation, protects the underlying cells from mechanical damage, and increases protection against fungi, bacteria, etc.
In aerial parts of the plant the outer wall of the epidermis is usually covered by a waxy cuticle that prevents desiccation, protects the underlying cells from mechanical damage, and increases protection against fungi, bacteria, etc.
植物地上部分的表皮的最外层通常覆盖一层蜡质角质层，起保护作用以防止过渡蒸腾，并使下方的细胞免于机械损伤，同时增加对真菌、细菌等的防御能力。