Page 7 - 2- Lesson Notes- Simple Permanent Tissue
P. 7
• In desert plants, epidermis and cutin (a water proof waxy substance secreted
by epidermis) are thicker to reduce loss of water due to transpiration.
2. Cork Simple Tissues
• These types of tissue consist dead cells with no intercellular spaces.
• They form the outer layer of old tree trunks.
• Cork cells have a chemical called suberin in their walls that makes them
impervious to gases and water.
• Cork tissue protects plants from injuries, germs and water loss.
• Cork being light in weight is used for making several products like bottle
stoppers and shuttle cork.
