Figure 4.

Mean levels of transcriptional expression (±SE) of (A) CsPPO1 and (B) CsPPO2 in tissues from the roots, stems, leaves, and flowers of Camellia sinensis. CsGAPDH was used as a reference gene. For each column, different letters indicate significant differences among tissues (p < 0.05, Duncan’s multiple range test, n = 5).