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Abstract Title:

Metabolite profiling of red and white pitayas (Hylocereus polyrhizus and Hylocereus undatus) for comparing betalain biosynthesis and antioxidant activity.

Abstract Source:

J Agric Food Chem. 2014 Aug 27 ;62(34):8764-71. Epub 2014 Aug 14. PMID: 25101804

Abstract Author(s):

Dong Ho Suh, Sunmin Lee, Do Yeon Heo, Young-Suk Kim, Somi Kim Cho, Sarah Lee, Choong Hwan Lee

Article Affiliation:

Dong Ho Suh

Abstract:

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.

Study Type : In Vitro Study
Additional Links
Pharmacological Actions : Antioxidants : CK(21528) : AC(8856)

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