1. Transport and Support 9.2

2. Mineral Uptake by Roots What’s the deal with branching roots and root hairs? Potassium, phosphate and nitrate among others move into the root system by A.T.

3. 3 main ways ions can get to plant root systems 1. diffusion 2. mass or bulk flow 3. fungal hyphae – mycchorizae

4. Structure and function of stems Stems: connect flowers, leaves and roots Serve as transport pathways, via phloem and xylem Support in terrestrial plants

5. State that terrestrial plants support themselves by a variety of means, including: Structure of xylem vessels Cells are dead at maturity Cell walls are thickened: extra cellulose and lignin (lignified) Cell Turgor (TP): ? Essentially one continuous tube

6. Define Transpiration The act or process of transpiring, especially through the stomata of plant tissue or the pores of the skin.

7. Water Transport Through Plants Cohesion-Tension Theory: structure of x.v., evaporation, cohesion, adhesion, tension, = transpiration pull

8. State that guard cells can regulate transpiration by opening and closing stomata

9. More guard cell and stomata images

10. Explain how abiotic factors: light, temp, wind, and humidity affect transpiration rate

11. HOMEWORK Define: Xerophyte OUTLINE four adaptations of xerophytes that help REDUCE transpiration (due Monday)

12. Transport in Phloem: OUTLINE the role of phloem in active TRANSLOCATION of sugars (sucrose) and amino acids from source to sink Translocation? Source to Sink?