Root System.pptx

Root System

1. MORPHOLOGY OF FLOWERING PLANTS THE ROOT SYSTEM

2. MORPHOLOGY OF FLOWERING PLANTS Morphology: The study of various external features of the organism is known as morphology. Adaptation: Any alteration in the structure or function of an organism or any of its parts that results from natural selection and by which the organism becomes better fitted to survive and multiply in its environment. The Root: The root is an underground part of the plant and develops from the elongation of the radicle of the embryo.

3. DIFFERENT TYPES OF ROOT SYSTEM

4. REGIONS OF THE ROOT Root Cap: The root is covered at the apex by the thimble-like structure, which protects the delicate apex of the root as it makes its way through the soil Regions of the root: 1. Region of meristematic activity: The cells of this region are tiny, thin-walled, and with dense protoplasm. They can divide. 2. Region of elongation: Cells of this region are elongated and enlarged and are responsible for the growth of the root in length. 3. Region of Maturation: This region has differentiated and matured cells. Some of the epidermal cells of this region form thread-like root hairs that absorb water and minerals from the soil.

5. MODIFICATIONS OF ROOT Roots are modified for support, storage of food, and respiration. For support: Prop roots in the banyan tree, stilt roots in maize and sugarcane. For respiration: Pneumatophores in Rhizophora (Mangrove). For storage of food: Fusiform (radish), Napiform (turnip), Conical (carrot).

6. DIFFERENT FORMS OF ROOTS Conical roots: These have a broad base and conical shape, e.g., carrot. Fusiform roots: S uch roots are swollen in the middle portion and tapering towards the end, e.g., radish. Napiform roots: These roots are tapering at the apex and spherical at the base, e.g., turnip. Tuberous roots: T hese are thick and fleshy roots modified for food storage, e.g., dahlia.