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. 2022 Jan 16;152(1):55–71. doi: 10.1007/s11120-022-00898-8

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Fig. 7 — Efficiency of PSII in A. pseudplatanus leaves acclimated to eight levels of irradiance immediately before transfer to full sun (a), one day after transfer (b) and 29 days after transfer (c). Means ± standard errors for plants transferred to full solar irradiance (TRANS) or remaining under the original irradiance (CONT) are shown. Asterisks indicate significant contrasts between treatments within each irradiance level (*P < 0.05, ***P < 0.001)