1. What gets transported throughout the plant?  Water  Minerals  Sugar

2. Roots absorb water and minerals  Root hairs and associated fungi help absorb water and minerals from soil  Root pressure : Water and minerals move into the vascular tissue (xylem)  Minerals (nutrients) move in by active transport  The more minerals that accumulate in xylem the more water will enter through osmosis

3. Upward movement of xylem sap Besides root pressure, three other factors are involved in this process:  Transpiration – loss of water through evaporation generates the transpiration pull  Cohesion – water molecules form continuous strings from roots to leaves  Adhesion – water molecules stick to cellulose molecules in xylem.

4. Transpiration Transpiration is required for:  The upward transport of water and minerals from the roots to the leaves  Evaporative cooling

5. Regulating water loss Water follows potassium ions from surrounding cells into guard cells The flow of potassium ions and water out of the guard cells causes them to sag together, closing the stoma

6. Downward movement of phloem sap  From source to sink – Phloem moves sugars from where they are made to where they are used  What drives movement of phloem sap is the pressure-flow mechanism

8. Animations  http://www.wou.edu/~bledsoek/103materials/pr esentations/plant_transport.ppt http://www.wou.edu/~bledsoek/103materials/pr esentations/plant_transport.ppt http://www.wou.edu/~bledsoek/103materials/pr esentations/plant_transport.ppt  http://highered.mcgraw- hill.com/sites/9834092339/student_view0/chapt er38/animation_-_water_uptake.html http://highered.mcgraw- hill.com/sites/9834092339/student_view0/chapt er38/animation_-_water_uptake.html http://highered.mcgraw- hill.com/sites/9834092339/student_view0/chapt er38/animation_-_water_uptake.html  http://www.bing.com/images/search?q=plant+w ater+transport+animation&view=detail&id=A71 CC3149D81C8011A1D0F239410277DDD3631 62&first=1&FORM=IDFRIR&ADLT=strict http://www.bing.com/images/search?q=plant+w ater+transport+animation&view=detail&id=A71 CC3149D81C8011A1D0F239410277DDD3631 62&first=1&FORM=IDFRIR&ADLT=strict http://www.bing.com/images/search?q=plant+w ater+transport+animation&view=detail&id=A71 CC3149D81C8011A1D0F239410277DDD3631 62&first=1&FORM=IDFRIR&ADLT=strict