12.4 Roots Pages 558-563. Roots Ta Phrohm temple in Cambodia.

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Presentation transcript:

12.4 Roots Pages

Roots

Ta Phrohm temple in Cambodia

Function Anchor plant Absorb water and nutrients Store water and carbohydrates

Types of Roots TaprootFibrous roots

Root hairs Microscopic hair-like outgrowth from an epidermal cell. Increase surface area for absorption

Root cap Thick layer of cells produces a slippery substance allowing root to penetrate soil Meristem

Cortex Parenchyma Stores carbohydrate Water passes through cortex

Endodermis Wrapped with a wax-like substance. Form a barrier called the Casparian strip

Vascular cylinder EudicotMonocot Gymnosperms

Root Specializations 80% of plants have mutualistic relationships with mycorrhizal fungi Also, nitrogen-fixing bacteria such as Rhizobia are found in the root nodules of legumes

Roots continued… Tuberous roots: lateral roots used for storage For example: yam Adventitious root: prop root

Uses of roots Food Medicine Erosion control

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