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. 2021 Nov 29;16(11):e0254599. doi: 10.1371/journal.pone.0254599

Fig 6. Seasonal changes in pressure volume parameters and midday leaf water potential.

Fig 6

The effects of the independent variables (species, sampling month, and their interaction as fixed effects) on the dependent variables (each pressure-volume parameter) were evaluated using a linear mixed model [69]. Type III tests were performed for fixed effects (Wald-type test). Significant interspecific differences were on Ψtlp and Ψmd (P < 0.0001, Type III test, Table 2). Effect of the month was also significant for all tested pressure-volume parameters (P < 0.0001, Type III test, Table 2). Asterisk in the figure indicates significant differences between species in each month (ANOVA, *, P < 0.05; **, P < 0.01; ***, P < 0.001; ns, not significant). The bars indicate standard division.