title: On-field monitoring of fruit ripening evolution and quality parameters in olive mutants using a portable NIR-AOTF device.
abstract: This study optimizes the application of portable Near Infrared-Acousto Optically Tunable Filter (NIR) device to meet the increasing demand for cost-effective, non-invasive and easy-to-use methods for measuring physical and chemical properties during olive fruit development. Fruits from different phenotypically cultivars were sampled for firmness, total and specific phenols detection by HPLC, total anthocyanins, chlorophyll and carotenoids detection by spectrophotometry. On the same fruits, a portable NIR device in diffuse reflectance mode was employed for spectral detections. Predictive models for firmness, chlorophyll, anthocyanins, carotenoids and rutin were developed by Partial Least Square analysis. Oleuropein, verbascoside, 3,4-DHPEA-EDA, and total phenols were used to develop a validation model. Internal cross-validation was applied for calibration and predictive models. The standard errors for calibration, cross-validation, prediction, and RPD ratios (SD/SECV) were calculated as references for the model effectiveness. The determination of the optimal harvesting time facilitates the production of high quality extra virgin olive oil and table olives.
authors.affiliation: Department of Agriculture, Forestry, Nature and Energy (DAFNE), Molecular Ecophysiology of Woody Plant Laboratory, University of Tuscia, Viterbo, Via San Camillo de Lellis snc, 01100 Viterbo, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Cirilli
authors.affiliation: Department for Innovation in Biological Agro-food and Forest systems (DIBAF), Postharvest Laboratory, University of Tuscia, Viterbo, Via San Camillo de Lellis snc, 01100 Viterbo, Italy. Electronic address: bellin@unitus.it.
authors.forename: Andrea
authors.initials: A
authors.lastname: Bellincontro
authors.affiliation: Department of Agricultural, Food and Environmental Sciences, University of Perugia, Via S. Costanzo, 06126 Perugia, Italy.
authors.forename: Stefania
authors.initials: S
authors.lastname: Urbani
authors.affiliation: Department of Agricultural, Food and Environmental Sciences, University of Perugia, Via S. Costanzo, 06126 Perugia, Italy.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Servili
authors.affiliation: Department of Agricultural, Food and Environmental Sciences, University of Perugia, Via S. Costanzo, 06126 Perugia, Italy.
authors.forename: Sonia
authors.initials: S
authors.lastname: Esposto
authors.affiliation: Department for Innovation in Biological Agro-food and Forest systems (DIBAF), Postharvest Laboratory, University of Tuscia, Viterbo, Via San Camillo de Lellis snc, 01100 Viterbo, Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Mencarelli
authors.affiliation: Department of Agriculture, Forestry, Nature and Energy (DAFNE), Molecular Ecophysiology of Woody Plant Laboratory, University of Tuscia, Viterbo, Via San Camillo de Lellis snc, 01100 Viterbo, Italy. Electronic address: muleo@unitus.it.
authors.forename: Rosario
authors.initials: R
authors.lastname: Muleo
mesh_terms: D002138:Calibration; D005638:Fruit / Q000737:chemistry; D016018:Least-Squares Analysis; D009154:Mutation; D031658:Olea / Q000737:chemistry*; D000069463:Olive Oil / Q000592:standards*; D010636:Phenols / Q000032:analysis; D019265:Spectroscopy, Near-Infrared
chemical_list: D000069463:Olive Oil; D010636:Phenols
keywords: Chlorophyll a (PubChem CID: 6449992); Chlorophyll b (PubChem CID: 46173742); Firmness; NIR-AOTF spectroscopy; Oleuropein; Oleuropein (PubChem CID: 5281544); Oleuropein-aglycone di-aldehyde (3,4-DHPEA-EDA) (PubChem CID: 56842347); Olive fruits; Partial Least Square regression (PLSR); Quercetin-3-O-rutinoside (rutin) (PubChem CID: 5280805); Rutin; Total phenols; Verbascoside; Verbascoside (PubChem CID: 5281800)