Fig. 2: Relationship between pre-dawn and midday Ψleaf and normalized midday gs or growth of mature temperate tree species.
a, The relationship between normalized midday gs and pre-dawn Ψleaf for all studied species at the SCCII site. The point of stomatal closure (Pst) was quantified for each species individually. The across-species mean Pst is indicated by a bold line, with the 50th and 95th percentile ranges shown as grey shading (Supplementary Fig. 4). b, Instantaneous response conditions between midday gs and midday Ψleaf, presented as in a. The across-species mean, as well as the 50th and 95th percentile ranges for Pst, are depicted as for a. c, Growth probability and rate responses to pre-dawn Ψleaf, obtained from weekly band dendrometer readings. Zero growth rates versus non-zero growth rates were analysed to determine the growth probability using a mixed-effect model with a binomial distribution. Axes labelled (-) indicate unitless values, resulting from normalization to the maximum value. The grey shading around the line represents the 95% confidence interval.
