Fig. 9

Mortality thresholds are explained by the elapsed time to reach a null hydraulic safety margin and to deplete starch. Relationships between the time thresholds to reach 50% and 80% mortality and time_HSM0 (a, b), the time to reach a null safety margin (Ψ_MD—Ψ₅₀), along with time_starch50 (c, d), the time to consume 50% of total starch concentrations. Different colors in dots and regression lines correspond to light-exposed (blue) and shaded (red) individuals before the drought experiment. Strong correlations between mortality, starch depletion, and HSM times were also observed when pooling both treatments together (Appendix Table 8). PGLS regressions supporting these relationships are also available in Appendix Table 9