Fig. 3.

The effects of Hpa1 on chlorophyll a and b concentrations (a) and chlorophyll a/b ratio (b) in leaves of Arabidopsis, tomato, and rice. Ten-day-old plants grown in pots were treated by spraying over tops separately with an aqueous Hpa1 solution and with pure water or an aqueous EVP solution in the experimental control group. Five days later, chlorophyll measurements were performed on the second youngest leaves. Data are shown as mean values ± SD from three experimental repeats (15 plants per repeat). Different letters in bar graphs indicate significant differences by two-tailed ANOVA and LSD test (P < 0.01)