Chapter Overview
This chapter explains the mechanisms by which plants transport substances such as water, minerals, and food. It covers concepts like diffusion, osmosis, facilitated diffusion, active transport, and bulk flow. You’ll also learn about the structure and function of xylem and phloem, transpiration, and translocation of nutrients.
Important Keywords
- Diffusion: Passive movement of molecules from a region of higher concentration to lower concentration.
- Osmosis: Movement of water through a semipermeable membrane from a dilute solution to a concentrated one.
- Active Transport: Movement of substances against the concentration gradient using energy (ATP).
- Xylem: Vascular tissue responsible for upward transport of water and minerals.
- Phloem: Vascular tissue that transports food (mainly sucrose) from leaves to other plant parts.
- Transpiration: Loss of water vapor from aerial parts of the plant, mainly through stomata.
- Plasmolysis: Shrinking of cell contents away from the cell wall when water leaves the cell.
- Guttation: Exudation of water droplets from leaf edges due to root pressure.
Detailed Notes
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