Fig. 1

Xyloglucan endotransglucosylase/hydrolase (XTH) transcript level and lignin content in transgenic switchgrass lines silenced for or overexpressing XTH-like1b or XTH-like2a. A Percent of target gene expression (target gene represents transgene for overexpressing lines and targeted plant gene for silenced lines) relative to control (mean value for three independent control plants) for plants representing listed transgenic lines at E3 stage of development. Expression of Ubq1 in these plants was analyzed and used to normalize XTH expression levels across lines. B Lignin content for plants representing listed transgenic lines and control (WT) at R1 stage. Transgenic lines: T0-Pv863-xx (silencing PvXTH-like2a); T0-Pv864-xx (overexpressing PvXTH-like2a); T0-Pv870-xx (silencing PvXTH-like1b); T0-Pv871-xx (overexpressing PvXTH-like1b)