摘要
Idesia polycarpa(I.polycarpa)is a newcomer of edible oil crops in China,with rich oil in ripe fruits.Phenolic compounds in six I.polycarpa oil(whole fruit oil from Leibo,LWFO;pulp oil from Leibo,LPO;seed oil from Leibo,LSO;whole fruit oil from Puan,PWFO;pulp oil from Puan,PPO;and seed oil from Puan,PSO)were analyzed using untargeted metabolomics,and their roles in antioxidant activity were also investigated.Thirty-one phenolic compounds were tentatively identified in I.polycarpa oils,primarily belonging to salicinoid analogues and p-coumaroyl derivatives;and their contents varied greatly from trace to 85.84 mg/kg oil(idescarpin in LSO).Multivariate analyses clearly differentiated the oils of I.polycarpa fruit in according to fruit parts and geographical origins,with twelve phenolics as the discrimative markers.Furthermore,phenolic extracts from the oils,especially LSO and PPO,exerted strong scavenging activity toward DPPH and ABTS radicals.Eight phenolics such as dimethyl coniferin,2-hydroxyphenol-1-O-β-D-glucopyranosyl-(6->1)-α-L-rhamnopyranoside,1-O-(2-hydroxyethyl)-4-O-p-coumaroyl-glucopyranose,tanegoside A,1-O-(2-hydroxyphenyl)-4-O-p-coumaroyl-β-D-glucopyranose,mono-O-acetylated p-coumaroyl idesin,and p-coumaroyl salicortin were the crucial compounds that played important roles in antioxidant potential.Overall,the findings suggested these phenolics as chemical markers for the differentiation and functional evaluation of I.polycarpa oils.
基金
support provided by the National Natural Science Foundation of China(32272242)
Zhejiang Province Key Research and Development Projects(2024C04014,2025C04041)
Zhejiang Provincial Natural Science Foundation of China(LTGN24C200011).
