Determination of anthocyanins, flavonoids and phenolic acids in potatoes. I: Coloured cultivars ofSolanum tuberosum L

✍ Scribed by Lewis, Christine E; Walker, John R L; Lancaster, Jane E; Sutton, Kevin H

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 268 KB
• Volume: 77
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/(sici)1097-0010(199805)77:1<45::aid-jsfa1>3.0.co;2-s

✦ Synopsis

The major anthocyanins, Ñavonoids and phenolic acids in the tubers (skin and Ñesh), Ñowers and leaves of 26 cultivars of Solanum tuberosum L with coloured skins and/or Ñesh have been identiÐed and quantiÐed using analytical HPLC. Red tubers contained mostly pelagonidin-3-(p-coumaroyl-rutinoside)-5glucoside (200È2000 lg g~1 FW) plus lesser amounts of peonidin-3-(pcoumaroyl-rutinoside)-5-glucoside (20È400 lg g~1 FW). Light to medium purple tubers contained petunidin-3-(p-coumaroyl-rutinoside)-5-glucoside (1000È 2000 lg g~1 FW) plus small amounts of malvidin-3-(p-coumaroyl-rutinoside)-5glucoside (20È200 lg g~1 FW) whilst dark purpleÈblack tubers contained similar levels of petunidin-3-(p-coumaroyl-rutinoside)-5-glucoside together with much higher concentrations of malvidin-3-(p-coumaroyl-rutinoside)-5-glucoside (2000È 5000 lg g~1 FW). Tuber Ñesh also contained chlorogenic acid (30È900 lg g~1 FW) and other phenolic acids plus low concentrations of Ñavonoids (0È 30 lg g~1 FW). Tuber skins showed much higher levels (1000È4000 lg g~1 FW) of chlorogenic acid. The major anthocyanins in Ñowers were present as the rutinosides or other glycosides of pelargonidin, petunidin and malvidin whilst glycosides of cyanidin and delphinidin were found in some Ñowers, together with many of the same phenolic acids as found in tubers. The commonest Ñavonoids included rutin, kaempferol-3-rutinoside and two quercetin-rhamnose-glucosides. Flowers and leaves contained higher concentrations of Ñavonoids which fell into two patterns, with some cultivars containing high concentrations of quercetin-3glycosides, whilst others had much lower concentrations.

1998 SCI. (