Tuesday, 22 March 2011

2.54 Transpiration

5 key points:

  • Transpiration is the evaporation of water from the surface of the plant through the stomatal pores.
  • Some light is absorbed by other structures in the leaf which creates heat and water is delivered to the leaf by xylem, and goes through the spongy mesophyll.
  • Liquid changes to a gas in the spongy mesophyll
  • It then diffuses out to the outside atmosphere at a fairly steep diffusion gradient.
  • Heat and light energy changes H2O to water vapor.

1 comment:

  1. make the second bullet point in to 2 points. One about light the other about water.

    'Liquid changes to gas in the air spaces of the spongy mesophyll not stomata.

    Edit your post to show the changes