Fig. 1
From: Study of traits and recalcitrance reduction of field-grown COMT down-regulated switchgrass
Chemical composition of field-grown switchgrass in years 2 and 3. The values (wt% of cell wall residue) reported are the average of 5 biological replicates from each control group and 10 biological replicates from each transgenic group (a). Error bars represent standard errors. Mannan was not detectable. An asterisk (*) indicates a significant difference between the transgenic and control groups as determined by a Student’s t test (P < 0.05). The distributions of lignin (b), xylan (c), and galactan (d) contents in switchgrass were compared. & The lignin content data of year 2 and year 3 plants are from previous publications [18, 19]