文摘

四个花青素分离出一个高度色素存储根的愈伤组织诱导purple-fleshed甘薯(番薯甘薯L)品种Ayamurasaki。花青素是分别确定为花青色素3 - O - (2 - O - (6 - O - ( E )-caffeoyl - β -D-glucopyranosyl) - β -D-glucopyranoside) 5 - O - - - - - - β -D-glucopyranoside花青色素3 - O - (2 - O - (6 - O - ( E )- - - p -coumaroyl - β -D-glucopyranosyl) 6 - O - ( E )-caffeoyl - β -D-glucopyranoside) 5 - O - - - - - - β -D-glucopyranoside花青色素3 - O - (2 - O - (6 - O - ( E )- - - p -coumaroyl - β -D-glucopyranosyl) 6 - O - ( E )- - - p -coumaroyl - β -D-glucopyranoside) 5 - O - - - - - - β -D-glucopyranoside, peonidin 3 - O - (2 - O - (6 - O - ( E )- - - p -coumaroyl - β -D-glucopyranosyl) 6 - O - ( E )- - - p -coumaroyl - β -D-glucopyranoside) 5 - O - - - - - - β -D-glucopyranoside通过化学和光谱分析。这些花青素检查对中性水溶液的稳定性以及自由基清除活性兑1,1-diphenyl-2-picrylhydrazyl自由基(DPPH)。这些acylated花青素表现出更高的稳定性和DPPH自由基清除活性高于相应nonacylated花青色素和peonidin 3 - O -sophoroside-5 - O 糖甙。