火龙果果实甜菜苷类色素组成与分布

Study on the components and distribution of betalain pigments in different species of pitaya fruit

目的:明确火龙果果实中甜菜苷类色素(BLs)组分构成及其部位归属。方法:采用超高效液相色谱飞行时间质谱法对3类火龙果果实[红皮红肉型(RR)、红皮白肉型(RW)和黄皮白肉型(YW)]的果肉部位和果皮部位甜菜苷类色素(BLs)进行筛查和结构确证。结果:3类火龙果果实中共鉴定出甜菜苷、丙二酰甜菜苷和梨果仙人掌黄质等19种组分,RR火龙果的果皮部位鉴定的BLs组分最多(14种),其次是RR果肉部位(12种)及RW果皮部位(9种)。结论:RR火龙果果实BLs组分最为丰富,RW次之,YW最少;BLs主要分布在红色果肉和红色果皮部位,在白色果肉和黄色果皮部位则较少。果肉、果皮部位检测出BLs组分分别为12,16种。

Objective:To reveal the compositions of betalains(BLs)from pitaya fruit and their distribution in different parts.Methods:Three types of pitaya fruits,red peel-red flesh(RR),red peel-white flesh(RW),and yellow peel-white flesh(YW),were selected.The screening and confirmation of BLs were performed by ultra-performance liquid chromatography-quadrupole-time-of-flight-mass spectrometry(UPLC QTOF-MS/MS).Results:A total of 19 components were identified,including betanin,phyllocactin,indicaxanthin,etc.Most components(14)were identified from the peel part of RR fruit,and secondly,12 components from the flesh part of RR fruit and nine components from the peel part of RW fruit.Conclusion:Among the various pitaya fruits,RR fruit presented the most prosperous components,and the following were RW and YW fruit.BLs components are predominantly distributed in the red flesh and red peel parts.The white flesh and yellow peel parts were scarce of BLs components.