Fig. 4. Relative expression of RhPIP1, RhTIP1, and RhLAC genes induced in the petals of R. hybrida after 6 h ethylene treatment. The fold change expression of genes was calculated relative to the 1 1-MCP + E treated sample as a control after normalization to the Rhˇactin gene. Expression level in 1-MCP with ethylene treated samples is defined as 1. Vertical bars represent standard deviations (n = 3).