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Leaf Shape Responds to Temperature but Not CO2 in Acer rubrum

Figure 2

Comparisons from temperature experiment for three leaf shape variables.

Data from the low CO2 treatment of the CO2 experiment are also included (middle bars in panels) because the environmental conditions for these leaves were identical to that in the temperature experiment but with an intermediate growth temperature (see Materials and Methods). Standard errors of the mean are plotted. All pairwise comparisons from the temperature experiment are significantly different (P≤0.05; see Table 1). Internal perimeter is the leaf perimeter after the removal of teeth; perimeter ratio is the leaf perimeter divided by the internal perimeter.

Figure 2

doi: https://doi.org/10.1371/journal.pone.0049559.g002