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Preliminary Results on the Non-Destructive Determination of Pear (Pyrus communis L.) cv. Rocha Ripeness by Visible/Near Infrared Reflectance Spectroscopy

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dc.contributor.authorCavaco, A. M.
dc.contributor.authorAntunes, Maria Dulce
dc.contributor.authorda Silva, J. M.
dc.contributor.authorGuerra, Rui Manuel Farinha das Neves
dc.date.accessioned2015-06-19T13:47:31Z
dc.date.available2015-06-19T13:47:31Z
dc.date.issued2008
dc.description.abstractPear (Pyrus communis L.), cv. Rocha was rapidly adopted by consumers due to its inherent quality and currently has great acceptance in both national and international markets, being mainly produced in the west region of Portugal. We report here a first approach to the use of the non-intrusive method of Visible/Near Infrared Reflectance Spectroscopy (Vis/NIRS) to estimate the ripeness of pear cv. Rocha. Mature unripe pears obtained from Frutoeste (Mafra, Portugal) after a six-month cold-storage, were maintained in a dark room at circa 20 degrees C during three weeks. They were followed using the Vis/NIRS in the wavelength band between 400 and 950 nm with two different configurations for the spectra acquisition, namely the Integrating Sphere (IS) and the Partial Transmittance (PT). The diffuse reflectance spectra obtained by the two configurations were compared with the respective fruit ripening parameters (colour, firmness, soluble solids content and % dry matter), determined through the standard techniques. Concerning the rough estimation of ripening parameters, data suggested an increase in both the intensity in the green to red band and pulp %dry matter, but a decreasing firmness. All other parameters remained constant. Relatively to the optical results, we have observed that the PT spectra exhibited clearer features than the IS spectra, especially from 700 nm onwards. This is probably due to the fact that the PT configuration probes more deeply into the fruit pulp. Three peaks at 600 (circa 30%), 725 and 812 nm (both at circa 50%) and a minimum at 675 nm, were identified in both IS and PT spectra. The values of reflectance peaks were approximately constant during ripening, but they moved to slightly lower wavelengths in the second week. A significant increase (circa 3-fold) in the minimal diffuse reflectance was observed in the second week, most probably associated partially, to a decrease in the fruit peel chlorophyll content.
dc.identifier.isbn978-90-6605-611-4
dc.identifier.issn0567-7572
dc.identifier.otherAUT: ACA01304; MAN00114; RGU01166
dc.identifier.urihttp://hdl.handle.net/10400.1/6470
dc.language.isoeng
dc.peerreviewedyes
dc.publisherInternational Society Horticultural Science
dc.relation.isbasedonP-004-4NT
dc.relation.ispartofActa Horticulturae
dc.titlePreliminary Results on the Non-Destructive Determination of Pear (Pyrus communis L.) cv. Rocha Ripeness by Visible/Near Infrared Reflectance Spectroscopy
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlacePeniche, Portugal
oaire.citation.endPage1105
oaire.citation.startPage1099
oaire.citation.titleProceedings of the 10th International Pear Symposium, Vols. 1 and 2
oaire.citation.title10th International Pear Symposium
oaire.citation.volume800 PART 2
person.familyNameCavaco Guerra
person.familyNameAntunes
person.familyNameGuerra
person.givenNameAna Margarida
person.givenNameMaria Dulce
person.givenNameRui
person.identifierC-1285-2012
person.identifier177556
person.identifier.ciencia-idC91E-B434-E327
person.identifier.ciencia-idC11B-9B05-217E
person.identifier.ciencia-id3D16-5067-D6BB
person.identifier.orcid0000-0003-2708-5991
person.identifier.orcid0000-0002-8913-6136
person.identifier.orcid0000-0002-8642-5792
person.identifier.ridA-4683-2012
person.identifier.scopus-author-id6602899707
person.identifier.scopus-author-id7102645075
rcaap.rightsopenAccess
rcaap.typeconferenceObject
relation.isAuthorOfPublication18ad736f-b1f3-4a19-9636-e7a80248cf94
relation.isAuthorOfPublication7947cc50-4ae0-4ada-8ddf-081f247adc90
relation.isAuthorOfPublicationeff7071e-e676-465b-bae3-983f522acd98
relation.isAuthorOfPublication.latestForDiscovery7947cc50-4ae0-4ada-8ddf-081f247adc90

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