C12 Plant Transport System

B11.      Plant physiology

B11.2    Transport systems in plants:

1. Know and understand how the structures of xylem and phloem are adapted to their functions in plants, including the role of:
2. lignified dead cells in xylem tissue in the transport of water and mineral ions from the roots to the stems and leaves.
3. living cells in phloem tissue in the transport of dissolved sugars from the leaves to the rest of the plant for immediate use or storage.
4. Know and understand how water and mineral ions are taken up by plants, and relate the structure of root hair cells to their function in this.
5. Know and understand the processes of transpiration and translocation, including the structure and function of the stomata.
6. Know and understand the effect of environmental factors on the rate of water uptake by a plant, including light intensity, air movement, humidity and temperature.
7. Calculate the rate of transpiration as: rate of transpiration $=\frac{\text { volume of water }}{\text { time taken }}$