[GSH]ext-induced [Ca2+]cyt response was absent in the atglr3.3 mutant. Averaged recording curves with se of 100 µm[GSH]ext-induced [Ca2+]cyt rise in the leaf cells of the ecotype Columbia (Col-0) and atglr3.3-1 and atglr3.3-2 mutants expressing aequorin (n = 10 for each).