Fig. 11.
Relationship between PSII efficiency (ΦPSII) under non-photorespiratory conditions in response to 200 µM ABA relative to no ABA (ΦPSII 200 ABA/ΦPSII C) and foliar ABA level for plants that had been exposed for 4 d to moderate (1.17 kPa) (closed symbols) or to low VPD (0.23 kPa) (open symbols).