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

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Fig. 8 — Effect of increased irradiance on autumnal shedding of leaves of A. pseudoplatanus plants acclimated to eight levels of irradiance. Proportion (%) of leaves remaining on plants in each treatment are plotted against day-of-year for plants remaining under the original growth irradiance (CONT; a) and transferred to full solar irradiance (TRANS; b). The mean day-of-year of leaf fall is shown for each treatment in relations to initial growth irradiance (c). Lines in (a) and (b) show exact determinations for c. 50 leaves in each treatment. Means per plant ± standard errors (N = 5) are shown in (c). Slopes of the regression lines in (c) are not significantly different (Ancova interaction P = 0.259) and the common slope Ancova indicated lack of irradiance effect (P = 0.181) but there was a significant transfer effect (P = 0.004). Note that a log scale for x-axis was used in (c)