Expression of CYP78A isoform genes and AMP1/LAMP1. A, RT-qPCR analysis of CYP78A isoform gene expression. B, RT-qPCR analysis of the expression of AMP1 and LAMP1. SAs, YLs, fully expanded leaves (EL), leaves in the early stages of natural senescence (ESL), and leaves in the late stages of natural senescence (SL) from plants grown under long-day conditions were analyzed. ACT8 was used as a reference. Values are the means ± SD (n = 6, biological replicates). Statistical differences were analyzed by one-way ANOVA followed by a Tukey–Kramer multiple comparison tests (P < 0.05). n.d., not detected.