Fig. 4

Analyses of lignin contents and the expression level of genes related to lignin biosynthesis.a-bComparison of lignin contents inGh4CL7-OEArabidopsisplants (a) and inGh4CL7-silencing cotton plants (b).cStem sections from theTRV:Gh4CL7andTRV:00cotton plants stained with phloroglucinol-HCl.dThe relative expression levels of genes related to lignin biosynthesis. Data were represented as the mean ± SE of three biological replicates; asterisks indicate levels of significance based on t-test (*P < 0.05, **P < 0.01)