Chapter 31-32 Nutrition and Transport in the Flowering Plant

Nutrition: the way in which organisms obtain and use food.

Water is very important substance obtained and transported throughout the plant.

Transpiration stream: the movement of water through a plant.

• Osmosis
• Root pressure
• Transpiration

Transpiration stream is maintained by osmosis, root pressure and transpiration.

Osmosis: the movement of water from an area of high water concentration to an area of low water concentration across a semi-permeable membrane.

The force exerted by water within the xylem tissue of the roots.

Transpiration: the loss of water from the aerial parts of a plant.

• Root hairs are adapted as they increase surface area to enhance absorption.
• Water enters the root hairs by osmosis (give term).
• Minerals dissolve easily in water and move into the root by diffusion- either by passive transport or by active transport (requires ATP).
• Water moves across the ground tissue and into xylem tissue.
• Water is then transported up the plant.

Root hairs have increased surface area to enhance absorption.

• Root hairs have increased surface area to enhance absorption.
• Water enters the root hairs by osmosis (give term).
• Minerals dissolve easily in water and move into the root by diffusion- passive / active transport (requires ATP).

Minerals dissolve easily in water and move into the root by diffusion- passive / active transport (requires ATP).

Diffusion by passive transport or active transport (requires ATP).

Active transport

Water moves across the ground tissue and into xylem tissue.

Xylem- a vascular tissue