Figure 7.

LC-MS Analysis of Methanolic Soluble-Phenolic Compounds Accumulated in the Stems of MOMT4 Transgenic Plants.

HPLC profiles of phenolic extracts from stems of the control (A) and MOMT4 transgenic (B) plants. P1 is tentatively identified as 4-O-methyl-feruloyl malate, P2 is 4-O-methyl-sinapoyl malate, and P3 is a 4-O-methyl-feruloyl glucose derivative. The corresponding mass spectra of the compounds are shown in (C) to (F), and their UV spectra are shown in Supplemental Figure 8 online. No sinapoyl malate was detected in those mature stems. K1, kaempferol 3-O-[6′′-O-(rhamnosyl)glucoside] 7-O-rhamnoside; K2, kaempferol 3-O-glucoside 7-O-rhamnoside; K3, kaempferol 3-O-rhamnoside 7-O-rhamnoside; st, internal standard chrysin. mAu, milli-absorbance unit.

[See online article for color version of this figure.]