The cork cambium produces cork cells containing which water repelling substance?

1. In woody plants the cork cambium is the outermost lateral meristem. 2. It produces the cork cells of bark, and those cells contain a waxy substance called suberin that repels water. 3. Bark then protects the plant from physical damage and helps reduce water loss. 4. Lignin is the compound that hardens secondary xylem and sclerenchyma walls, so it is the trap for a reader thinking of wood. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 30 "Plant Form and Physiology", section 30.2 Stems_