Noni (Morinda citrifolia) fruit is one of the traditional medicine materials widely consumed in the South Pacific area. The biological activities and medicinal values of noni fruit have been extensively documented. However, the chemical composition of noni fruit, which determines its pharmacological effects, remains unclear. Moreover, previous studies indicated that the medicinal values of noni fruit varies dynamically after harvest, which resulted in the quality instability of both fresh and processing noni products. To clarify the composition of metabolites in noni fruit and their variation patterns, non-targeted metabolome analysis was performed at different stages during postharvest storage. It was observed that (R)-3, 7-Dihydroxy-2, 4-dimethoxyisoflavan, 3-Hydroxy-5Z-octenyl acetate, Ancistrotectorine, Archange- licin, D-Tagatose, (−)-Epigallocatechin, Ethylsuberenol, Eugenitin, Garcimangosone C, Musanolone C, O-Isopentenylhalfordinol and Serotinose were highly accumulated in fresh fruit, which associated with the roles of noni fruit in antioxidant activity. On the contrary, Palmitic acid, Norecasantalol, Marmelolactone A, Isorhamnetin 3-(6-malonylglucoside), Isooctyl acetate, geranylacetone, Ethylparaben, Ethyl (4Z)-4,7- octadienoate, DL-Malic acid, Coumari, Cedrelanol, Carotol, BR-Xanthone A, 5-Dodecyldihydro-2(3H)-furanone, (Z)-alpha-Irone, and (2E,4E)-2,4-Dodecadienal were increasing significantly after harvest, which not only could be explained the natural antibacterial properties of noni fruit but also supported the healthy immune system and inflammation response. Our study provides new insights into the metabolites composition and their variation patterns after harvest in noni fruit.
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