Fig 14–15.
The effective quantum yield (ΔF/Fm′) of PS II measured for four limestone (MA12, MA24, J06, J07) and four sandstone (AD31, AD32, AD36, P05) strains when growing directly on sandstone (Fig. 14) and limestone (Fig. 15) rock substrate. The values plotted represent means of four replicated measurements. Genetically identical strains were displayed by a single value for better clarity. Differences were evaluated by post hoc comparisons of nonparametric Friedman two-way ANOVA tests (see Fig. 16). Standard deviations of the measurements are given in Tables S3–S4.