Fig. 4.

Effects of desiccation and rehydration on the lichen C. vulcani and its isolated algal partner. (a and d) Desiccation. (b and e) Rehydration after a desiccation period of 3 weeks. (c and f) Rehydration after a desiccation period of 9 weeks. Bars: black and white, chlorophyll a and chlorophyll b, respectively; black and white circles, zeaxanthin and violaxanthin. Dotted lines in rehydration graphs denote total chlorophyll concentrations in undesiccated controls. Data represent mean ± SE (n = 5–10).