title: Post-harvest nutraceutical behaviour during ripening and senescence of 8 highly perishable fruit species from the Northern Brazilian Amazon region.
abstract: The post-harvest nutraceutical characteristics of highly perishable native fruits species from the Northern Brazilian Amazon region were studied during 12 day at 15 ± 1 °C and 95 ± 3% RH. Uxi and caja fruit showed climacteric behaviour while caju, açai de terra firme, camu-camu, inajá, murici and araçá-boi were non-climacteric. Soluble solids and sugars increased for climacteric fruit while total acidity remained constant for all fruits. In general, all fruit species had high levels of total phenolics (121-9889 mg GAE 100 g(-1) dry weight pulp), vitamin C (31-1532 mg AA 100 mL(-1) juice) and antioxidant activity (AOX) (75-288 1 μmol Trolox Eq 100 g(-1) dry weight, ORAC value), however, camu-camu, acai and murici were among the highest. All fruits showed an increase in phenolic content (15-82%), a simultaneous decrease in ascorbic acid in both peel (88-98%) and pulp (89-97%), while AOX increased or decreased depending on the fruit species, very likely due to the specific phenolic profile being synthesized. We propose a hypothetical model where ripening/senescence induced a redox homeostasis imbalance which in turn triggered the responses.
authors.affiliation: UFRR/CAA, Department of Fitotecnia, Food and Technology Laboratory, University of Roraima State, BR 174 Km 12, 69310-270 Boa Vista, RR, Brazil. Electronic address: rapelbtu@hotmail.com.
authors.forename: Leandro Camargo
authors.initials: LC
authors.lastname: Neves
authors.affiliation: UFRR/CAA, Department of Fitotecnia, Food and Technology Laboratory, University of Roraima State, BR 174 Km 12, 69310-270 Boa Vista, RR, Brazil.
authors.forename: Jéssica Milanez
authors.initials: JM
authors.lastname: Tosin
authors.affiliation: UFRR/CAA, Department of Fitotecnia, Food and Technology Laboratory, University of Roraima State, BR 174 Km 12, 69310-270 Boa Vista, RR, Brazil.
authors.forename: Ronaldo Moreno
authors.initials: RM
authors.lastname: Benedette
authors.affiliation: Department of Horticultural Sciences, Texas A&M University, College Station, TX 77843-2133, USA. Electronic address: lcisnero@tamu.edu.
authors.forename: Luis
authors.initials: L
authors.lastname: Cisneros-Zevallos
mesh_terms: D000975:Antioxidants / Q000032:analysis; D001205:Ascorbic Acid / Q000032:analysis; D001938:Brazil; D019587:Dietary Supplements; D005638:Fruit / Q000737:chemistry* / Q000254:growth & development; D027822:Myrtaceae; D010636:Phenols / Q000032:analysis
chemical_list: D000975:Antioxidants; D010636:Phenols; D001205:Ascorbic Acid
keywords: Amazon-region; Antioxidants; Fruit-species; Nutraceuticals; Postharvest changes; Redox homeostasis; Ripening/senescence