BIOLOGY 152 Study Guide - Guard Cell, Sensible Heat, C4 Carbon Fixation
Document Summary
Eric"s lecture guide for march 11, 2008 water transport in plants. Process explained in terms of pathways, driving forces and resistances. Cross section of a white pine needle. Stomates lined with guard cells (closed on left, open on right) Intercellular air space surrounded by water filled cells so at 100% relative humidity water diffuses out. Vapor pressure inside is exponentially related to outside temp n o i t a r i p s n a r. Loss transpiration (latent heat loss), cools the leaf. Exchange: sensible heat exchange (convection and conduction, infrared radiation. Dew opposite of transpiration: adds heat to the leaf condensation sometimes to prevent frost. Transpiration is linearly related to temperature n o i t a r i p s n a r. Stomatal conductance how open the stomate is. Make atp used to pump protons out of cells. Apoplast space out of the symplast. Ions are taken up using the electrochemical gradient.
