Fig. 5

Effects of controlled deterioration on the thermal fingerprints of L. pulmonaria, P. furfuracea and P. leucophlebia thallus discs upon imbibition (Experiment 4). "Live", "stressed" and "dead" thallus discs are shown in green, orange and red colour, respectively. a–c Maximal photochemical efficiency (Fv/Fm) of thallus discs. Bars labelled with different letters indicate significant differences between "live", "stressed" and "dead" thallus discs with high, medium or low Fv/Fm, respectively, at P < 0.05 (one-way ANOVA). Bars are means ± SE of n = 8 thallus discs each. d–f Moisture contents (MC) of another set of thallus discs during imbibition. Symbols are means ± SE (n = 4). At each time interval, letters indicate significant differences between "live", "stressed" and "dead" thallus discs at P < 0.05 (one-way ANOVA). In d, the green and red lines overlap. g–i Thermal fingerprints of "live", "stressed" and "dead" thallus discs, showing median values of relative temperature (rT) during imbibition. Data are medians of n = 14 thallus discs. j–l Differences between the fingerprints of "live" vs "dead", and of "stressed" vs "dead" thalli (ΔT). Horizontal green (or orange) bars at the bottom of the graphs indicate the time windows in which the rT of "live" (or "stressed") discs differed significantly from "dead" discs at P < 0.05 (Two Sample t-test). Open blue horizontal bars indicate the time periods of hydration by water vapour and closed blue bars indicate imbibition in liquid water from below