Figure 1.
Acclimation of mature shade leaves during short-term exposure to sun. The diel PPFDs are shown for the sun and the shade environment in the glasshouse at the canopy level where leaf samples were taken. The dashed arrow indicates the transfer from sun to shade light intensity. Carotenoid pigment profiles and PSII efficiency (Fv/Fm) were determined from a shade-acclimated avocado tree exposed to sun for 7 h and then returned to the shade (gray area). The DPS of the V cycle was calculated as [A+Z]/[V+A+Z]. Values are means ± se (n = 4). Time of day is shown according to the 24-h clock.