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B-induced changes in [Ca2+]c in Arabidopsis photoreceptor mutants. cry1, cry2, and nph1 mutants expressing aeq were illuminated with B for 10 s, and [Ca2+]c was measured as described in the legend to Fig. 1. The hy4 mutant and the control wild type used in this experiment are of the Landsberg ecotype. All other Arabidopsis plants used were of the Colombia ecotype. n = 10 in both panels; ▫, mutants; ⧫, wild type; ×, control (unstimulated mutant).
