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. 2018 Mar 6;9:287. doi: 10.3389/fpls.2018.00287

FIGURE 1.

FIGURE 1

Color attributes related to chroma (A), Hue angle (B), color index (C), and lightness (L∗) (D) of coffee beans from C. arabica cv. Icatu collected at 25°C, and within the ranges of 30–35 and 36–40°C (diurnal temperatures). For each parameter, the mean values ± SE (n = 9, performing two replicates of nine plants) followed by different statistical indexes express significant differences between temperatures for the same CO2 treatment (a, b), or between CO2 treatments within each temperature (A,B). Two-way ANOVA depicted significant changes for temperature, [CO2] conditions, and the interaction for chroma. For the H° and CI, the ANOVA found significant changes for temperature, but not for [CO2] conditions or the interaction.