Integrity of epidermal cells after SMS treatment visualised by vital staining. (A) Leaves of A. thaliana Col0 or the glabrous gl1 mutant were treated by SMS (10X) or wounded with forceps and visualized after 1 day by using Trypan blue staining. All plants were kept under humid conditions after treatment prior to trypan blue staining. Observations were made 2 times on 6 different leaves. Representative samples are shown. (B) Resistance to B. cinerea in response to SMS in gl1 mutant compared to Col0 plants (n = 96; ±SE). After B. cinerea inoculation, all plants were kept under humid conditions. The experiment was repeated 2 times. Asterisks indicate statistically significant differences between non-treated leaves and SMS-treated leaves, T-Test (p < 0,01).