FRST 303 Lecture 2: Lecture 2 – September 11, 2014.docx
Document Summary
All your nutrients are in the soil but for a plant you want to be above ground to get sun: plants require carbon dioxide, and everything needs water, co2 is absorbed through their pores on the surface (pores are called stomata, stomata: refers to the pore, which has 2 guard cells that open or close the cell. They fill up with water and become taut and leave the pore open or become flaccid and they flop over, closing the pore: when they are open to allow for uptake of co2 and o2, water is lost, has to be open long enough to take up co2 and o2 but not too long as to not loose too much water, to address that they can open and close in a matter of seconds, water use efficiency: look at the amount of the sugar produced and the amount of water used or lost to produce that photosynthesis.
