The photosynthesis 'light response curve' Preparing a photosynthesis light response curve During week two of the Photosynthesis Investigation section of Biol 103 you will be producing a photosynthesis 'light response curve' for a leaf and comparing your results to those of another group examining a different type of leaf.
The two leaves may come from different species or represent physiologically different leaves from the same plant. O2 evolution curves A light response curve is an example of a "second-order" graph, since the rate of photosynthesis first must be determined by plotting O2 evolution vs time at different light levels. The rates calculated from each O2 evolution curve are then plotted against light level. For example, the figure below shows O2 evolution curves when photosynthesis was allowed to occur in the presence of two different light levels. Notice that there is a time period (called the lag period) between the time the lights are turned on and when photosynthesis reaches steady state. 1.
A. O2 evolution rates 3. Home Page for Ross Koning. Govindjee Main Page | University of Illinois at Urbana-Champaign. Home Page for Ross Koning. La photosynthese.