Figure 1.

Effects of pre-treatment and post-treatment of allantoin (AT) on the relative water (RWC) content (A), epicuticular wax (B), proline (Pro) content (C), free amino acid (FAA) content (D), soluble protein (SP) content (E), and soluble carbohydrate (SC) content (F) in tomato plants grown 15 days in presence and absence of UVC stress. Each boxplot shows values of five independent replicates (n = 5). Boxplots specified with the same letter(s) are statistically non-significant at p < 0.05 based on Tukey’s test. “C”, no AT and grown under non-stress condition; “UVC1”, exposed to 0.6 W m⁻² UVC irradiation; “UVC2”, exposed to 1.2 W m⁻² UVC irradiation; “Pre-AT”, pretreated with 100 nM AT and thereafter exposed to 0 W m⁻² UVC irradiation; “AT+UVC1”, pretreated with 100 nM AT and after that exposed to 0.6 W m⁻² UVC irradiation; “AT+UVC2”, pretreated with 100 nM AT and after that exposed to 1.2 W m⁻² UVC irradiation; “Post-AT”, exposed to 0 W m⁻² UVC irradiation and thereafter treated with 100 nM AT; “UVC1+AT”, exposed to 0.6 W m⁻² UVC irradiation and thereafter treated with 100 nM AT; “UVC2+AT”, exposed to 1.2 W m⁻² UVC irradiation and after that treated with 100 nM AT.