Figure 8.

Monolignol incorporation capacity in the old part of the floral stem. The capacity of cell walls to incorporate monolignols into cell walls was evaluated by measuring the signal of fluorescent probes bound to monolignol chemical reporters metabolically incorporated into the lignin polymer. The tagged monolignol associated incorporation signal was localized in the interfascicular fibers and xylem cell walls (A,C). H_az tagged lignin reporter unit signal appears in green, G_alk in red and S_cp in purple. Scale bar = 50 µm. The associated incorporation signal was quantified in ugt72e3 and compared to the WT (B,D). Means (± SD) with the same lowercase letters are not significantly different according to Student t-test (p-value < 0.01, n = 3).