Fig. 4From: NtbHLH1, a JAF13-like bHLH, interacts with NtMYB6 to enhance proanthocyanidin accumulation in Chinese NarcissusExpression analysis of flavonoid biosynthesis pathway genes in flowers of NtbHLH1 transgenic tobacco. 1–3, 1–4 and 1–7 means three transgenic lines. The bars indicate the standard error of three biological replicates. Star represents the significant difference from wild type at the level of p < 0.05 using SPSS testBack to article page