Figure 6From: Constitutive expression of a grapevine polygalacturonase-inhibiting protein affects gene expression and cell wall properties in uninfected tobaccoCell wall lignin content in leaves. The lignin content of untransformed control (WT) and transgenic Vvpgip1 line 37 and 45 is expressed as the percentage contained in the alcohol-insoluble residue (AIR). Lignin content was determined with the acetyl bromide lignin method, as described in [29]. Statistical analyses (two-tailed Student's t-test) could separate the WT from the Vvpgip1 line 37 (p = 0.035) but not Vvpgip1 line 45, for which a similar trend was seen (p = 0.20). Standard deviation is given as error bars. N represents the number of biological repeats.Back to article page