HPLC profile and UV/visible spectra of MeOH
extracts of 6-week-old shoot tissues from control (S33) and AS-DFR
lines (RFD7 and RFD 8) of L. corniculatus. Condensed
tannin contents of these lines were: S33, 10.7 mg/g dry weight; RFD7,
7.1 mg/g dry weight (66% of control level); and RFD8, 5.9 mg/g dry
weight (55% of control level). Extracts from equivalent amounts of
tissue were subjected to HPLC with diode-array detection. HPLC profiles
were monitored at 350 nm and spectra were recorded between 240 and 400
nm. Chemical analysis indicated that the majority of peaks were either
kaempferol or kaempferol glycosides (peaks 1–3 and 5–13). Identified
peaks are: kaempferol (peak 13), kaempferol-3-rhamnoside-7-glucoside
(peak 7), kaempferol-3-glucoside (peak 8), kaempferol-3-rhamnoside
(peak 9), kaempferol-3,7-dirhamnoside (peak 10), and
kaempferol-7-rhamnoside (peak 11).