期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 62, 期 34, 页码 8764-8771出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf5020704
关键词
Hylocereus polyrhizus; Hylocereus undatus; metabolite profiling; GC-TOF-MS; UPLC-Q-TOF-MS; antioxidant activity; betalain biosynthesis pathway
资金
- National Research Foundation of Korea (NRF) grant - Korea government [MEST 2013-A423-0061]
- Next-Generation BioGreen 21 Program (SSAC), Rural Development Administration, Republic of Korea [PJ00952004]
- National Research Foundation of Korea [22A20130012233] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Rural Development Administration (RDA), Republic of Korea [PJ009520042014] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Metabolite profiling of red and white pitayas (Hylocereus polyrhizus and Hylocereus undatus) was performed using gas chromatography time-of-flight mass spectrometry and ultraperformance liquid chromatography-quadrupole-time-of-flight mass spectrometry with multivariate analysis. Different species and parts of pitayas (red peel, RP; white peel, WP; red flesh, RF; and white flesh, WF) were clearly separated by partial least-squares discriminate analysis. Furthermore, betalain-related metabolites, such as betacyanins and betaxanthins, or their precursors were described on the basis of their metabolites. The results of antioxidant activity tests [1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), and ferric reducing ability of plasma (FRAP)], total phenolic contents (TPC), total flavonoid contents (TFC), and total betacyanin contents (TBC) showed the following: RP >= WP > RF > WF. TPC, TFC, TBC, and betalain-related metabolites were higher in the peel than in the flesh and suggested to be the main contributors to antioxidant activity in pitayas. Therefore, peels as well as pulp of pitaya could beneficially help in the food industry.
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