Fig. 7.
Principle component analysis (PCA) for 41 Arabidopsis accessions that had been exposed for 4 d to moderate VPD (1.17 kPa) or to low VPD (0.23 kPa). The numbers indicate the accessions according to the numbering in Table 1. The PSII efficiency (ΦPSII) under non-photorespiratory conditions at 200 µM ABA relative to ΦPSII of the control (0 µM ABA), and the slope of the fitted sigmoidal relationship between transpiration rate and RWC of the leaves were used for the analysis. Component one and two explain 86.3% of the point variability.