Suberin A fatty acid polyester produced in the walls of the endodermis and in bark, where it renders the tissue impermeable to water and resistant to decay.

• 木栓质（软木脂）：是植物内皮层和树皮层细胞壁产生的一种脂肪酸聚酯，它使组织具有抗水性和抗分解性。