Figure 4.
Low-light response of NOP (squares) and GOP (triangles) for individual leaves of French bean exposed to 21% O2 (black symbols) or 2% O2 (white symbols). A through F show individual low-light responses, and G and H show averaged values. NOP values are corrected for Ci variation using Kirschbaum and Farquhar (1987). Dashed-dotted lines represent the linear regression of the values obtained for light intensities between 40 and 100 μmol m−2 s−1. Error bars represent se for n = 3.