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Net photosynthesis:respiration (P:R) ratios as function of increasing temperatures in the two studied strains of Klebsormidium flaccidum (n = 4, mean ± s). SAG 2307: terrestrial isolate; SAG 7.91: freshwater isolate. Significances among the treatments were calculated by one-way ANOVA (P < 0.05). Different letters represent significant differences among the temperatures as revealed by Tukey’s post hoc test.
