Figure 2.
Enhanced ethylene production by ACC treatment alters hypocotyl elongation. Wild-type accessions of Arabidopsis thaliana (Col) and Cardamine hirsuta (Ox), as well as the ethylene-insensitive A. thaliana mutant ein2-5, were germinated and grown under W (50 μmol m−2·s−1) for 2 days in media supplemented (+) or not (−) with 10 μM ACC and then exposed for 5 days to either W or W+FR. The plots show mean and SD of hypocotyl length of approximately 20 seedlings per treatment. Dots represent individual data points. Asterisks indicate significant differences between the two light treatments, according to two-way ANOVA, followed by Sidak’s test (**** p < 0.0001). Non-significant differences are not indicated.