Transport in plants

• What is the transport of sugars in plants called?

  Translocation
• What is the transport of water in plants called?

  Transpiration
• Where is translocation most common?

  Phloem tubes
• What is the chain of water molecules in a xylem / phloem cell?

  Transpiration stream
• What are the 4 main effectors that effect transpiration?

  • Temperature
  • light intensity
  • air flow
  • humidity
• Light intensity


  Brighter light = higher rate of photosynthesis = higher rate of transpiration
• Temperature

  Higher temperature = higher rate of transpiration

  • why ?

  Water molecules have more energy,, and so are more LIKLEY to diffuse out of the stomata.
• Air flow


  Higher rate of air flow = higher concentration gradient = higher rate of transpiration
• Humidity

  higher humidity = decrease in concentration gradient = lower rate of transpiration
• What is the movement of cell sap (mix of sugar and water) up and down the plant?

  Translocation