Table 1.
Boronia species and seed collection sites used in this study.
All sites are within the Sydney region of south eastern Australia.
Table 2.
Seasonal incubation temperatures derived for each of the study species using long-term datasets from nearby weather stations [71].
Refer to Table 1 for locations of seed collection sites.
Table 3.
Seed traits of seven species of Boronia from south eastern Australia.
All seeds were black with linear, well-developed embryos. Quantitative data are means with standard errors in brackets.
Fig 1.
Predicted seed germination of seven species of Boronia from south eastern Australia in response to factorial combinations of heat shock, smoke and seasonal temperature regimes after 6 and 14 weeks’ incubation.
Bar colours represent treatments as per the legend. Error bars are 95% Bayesian credible intervals. Different letters above bars indicate significant differences between means at α = 0.05.
Table 4.
Estimated posterior means, standard errors and 95% Bayesian credible intervals of regression coefficients for the combined effects of heat shock (H), smoke (S) and seasonal temperature treatments (autumn/spring regime, SeAut/Spr; winter regime, SeWin) on seed germination of seven species of Boronia from south eastern Australia after 6 and 14 weeks’ incubation.
Fig 2.
Kaplan-Meier estimates of survivor functions for seeds of seven species of Boronia from south eastern Australia treated with factorial combinations of heat shock, smoke and seasonal temperature regimes.
Line types represent seasonal temperature regimes as per the legend. Shading indicates point-wise 95% confidence intervals.
Table 5.
Timing of germination for seven species of Boronia from south eastern Australia in response to heat shock, smoke and seasonal temperatures, as estimated by non-parametric Kaplan-Meier survivor functions.
Prior to incubation seeds received no treatment (control, (C)), heat shock (H), smoke (S), or heat shock plus smoke (H+S). Relative germination rates were not derived for treatments with less than 20% mean final germination.