Fig. 6

a Heat maps of the relative expression of ZjbHLH genes during flower development. FL1, bud emergence stage; FL2, inflorescence emergence stage; FL3, yellow bud stage; FL4, petal spread stage. Scaled log2 expression values based on qRT-PCR data are shown from blue to red, indicating low to high expression. b The protein-protein interaction analysis of four ZjbHLHs by STRING database