BIO203H5 Lecture Notes - Meristem, Root Cap, Gas Exchange
Document Summary
Strategy behind being diverse is to be more competitive for water and resources in the soil. Plants that are highly competitive can survive long periods of drought. Idea behind these diverse roots is to compete in conditions with limited resources. Shade leaves: large, broad and thickness is different. Three primary tissue systems- protoderm, ground meristem, procambium. Meristems: can develop into any type of tissue they want. Can perform mitosis and cell division, result in new cells (increasing number of cells) Protected by leaf primordial in shoot. apical meristem in lateral bud is where the twigs develop. 3 different types of tissues that develop from apical meristems. Youngest part of the root is the tip of the root. Epidermal cells- secretes cuticle that protects plant from excessive water loss from epidermal cells. Gas exchange- release of water vapor, and oxygen. Ground tissue: parenchyma: in leafs, it has a photosynthetic purpose. In roots, parenchyma cells support storage of carbohydrates.
