Fig. 4. The effect of temperature on the dark recovery of photosystem II (PS II) chlorophyll variable fluorescence from leaves of sloughgrass, hairgrass, and tall fescue following illumination at 25°C. Data are presented as fluorescence reappearance ratio (FRR). Each point is the mean of five or more replications. Bars indicate the standard error of the mean. Standard errors of the mean not shown are smaller than the size of the symbol.

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