Root Functions

1
Root Functions

• Primary

• Secondary

• Anchor
• Absorb

• Storage of Food
• Hormone Production
• Support
• Provide Oxygen
• Transport

2
Region of Maturation/ Differentiation
Root hair
Region of Elongation
Meristematic Region
Root Cap
3
Root types

• Tap
• Fibrous
• Adventitious

• 1 main root
• Many branch roots
• Roots from stems

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Tissue Functions

• Epidermis
• Root hairs
• Cortex
• Root cap
• Root hairs
• Pericycle
• Vascular cylinder
• Endodermis/Casparian strip

• Protection
• Absorption
• Storage
• Protection
• Major absorption
• Origin of lateral roots
• Location of vascular tissues
• Controls passage of minerals

6
Mineral Absorption in Roots

• Active transport into root hairs
• Diffusion through cytoplasm of cortex
• Active transport into the vascular cylinder
• Diffusion up the xylem