Vol. 32 No. 3 (2018): Special issue on Postharvest
Articles

Quality and nutraceutical properties of mango fruit: influence of cultivar and biological age assessed by Time‐resolved Reflectance Spectroscopy

Maristella Vanoli
Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)
Maurizio Grassi
Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)
Lorenzo Spinelli
Consiglio Nazionale delle Ricerche
Alessandro Torricelli
Politecnico di Milano
Anna Rizzolo
Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria (CREA)

Published 2018-09-13

Keywords

  • absorption coefficient,
  • ascorbic acid,
  • carotenoid composition,
  • Mangifera indica L.,
  • total antioxidant capacity

How to Cite

Vanoli, M., Grassi, M., Spinelli, L., Torricelli, A., & Rizzolo, A. (2018). Quality and nutraceutical properties of mango fruit: influence of cultivar and biological age assessed by Time‐resolved Reflectance Spectroscopy. Advances in Horticultural Science, 32(3), 407–420. https://doi.org/10.13128/ahs-22856

Abstract

The content and composition of the main antioxidants in the pulp of mangoes depend also on cultivar and maturity degree, the latter being non-destructively evaluated by the absorption coefficient measured by Time-resolved Reflectance Spectroscopy (TRS) at 540 nm (µa540). Aiming at evaluating the levels of antioxidants [carotenoids (CAR), phenols (TPC), ascorbic acid (AA)] and antioxidant capacity (TAC) in relation to µa540 maturity class, selected ‘Haden’ and ‘Palmer’ mangoes were measured for µa540 by TRS, classified based on µa540 value as less (LeM), medium (MeM) and more (MoM) mature and analyzed for pulp firmness, pulp color (a*, h°, Yellowness Index), CAR (total and composition by HPLC-DAD), TPC, AA and TAC. ‘Palmer’ fruit had higher TPC, AA and TAC than ‘Haden’ mangoes. On average MoM fruit showed higher TPC, total CAR, total all‐trans‐violaxanthin esters and all‐trans‐β‐carotene than MeM and LeM fruit. LeM fruit did not have compounds belonging to the 9‐cis‐violaxanthin group, while cis‐β‐cryptoxanthin was approx. 19% of total carotenoids. In MoM mangoes the main carotenoid was all‐trans‐β-carotene (53%), followed by total all‐trans‐violaxanthin esters (30%), 9‐cis‐violaxanthin group (8%) and cis‐β‐cryptoxanthin (6%). The µa540 significantly correlated (r=0.78‐0.94) with total CAR, all‐trans‐β‐carotene, all‐trans‐violaxanthin no.3 (both cultivars), TPC, all‐trans‐violaxanthin no.1, no.2, no.6 (‘Haden’), and 9‐cis‐violaxanthin no.2, no.3 (‘Palmer’). Our results indicate that TRS is suitable to non-destructively measure the pulp color of mangoes and to sort fruit with different ripening degree and nutraceutical properties.

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