Applications for MINI-PAM-II: Standard Configuration

Figure 2: Relative humidity of air and leaf temperature measured in parallel with Y(II) and PAR (see Fig. 1). As expected, air temperature increased with PAR and relative humidity decreased with increasing temperature.

Electron transport rates (ETR) derived from Y(II) and PAR of Fig. 1 plotted against PAR. ETR data result from standard calculations by the WinControl-3 software, or the MINI-PAM-II firmware. The blue curved line was obtained by fitting the model of Jassby and Platt (1976, Limnol Oceanogr 21: 540-547) to the data. The cardinal values of the light curve are indicated: α, initial slope; ETRMAX, maximum electron transport rate; IK, minimum saturating PAR. These cardinal values are useful to characterize the light acclimation status of a sample. Often, in high light acclimated leaves, the ETRMAX and IK parameters are elevated.