Fig. 7.

Observation of transverse section staining of inflorescence stems and determination of lignin contents in transgenic plants. a–f Toluidine blue staining of the inflorescence stems from wild-type (WT) and transgenic lines. a, c, e: bar = 100 μm. b, d, f: bar = 200 μm. F: interfascicular fibre; X: xylem. g–h Determination of lignin contents in inflorescence stems of Arabidopsis. Significant differences in lignin content levels between WT and transgenic overexpression lines of Arabidopsis were determined by a t test; *P < 0.05, **P < 0.01