Data/hora: 21/06/2024 20:58:13

Biblioteca(s): | Embrapa Agroindústria Tropical; Embrapa Mandioca e Fruticultura.
Data corrente: | 07/06/2006
Data da última atualização: | 08/06/2018
Autoria: | TEIXEIRA, G. H. de A.; DURIGAN, J. F.; MATTIUZ, B. H.; ALVES, R. E.; O'HARE, T. J.
Afiliação: | UNESP/FCAV; UNESP/FCAV; UNESP/FCAV; RICARDO ELESBAO ALVES, CNPAT; DPI&F.
Título: | Cultivar affects browning susceptibility of freshly cut star fruit slices.
Ano de publicação: | 2006
Fonte/Imprenta: | Scientia Agricola, Piracicaba, v. 63, n. 1, p. 1-4, jan./feb., 2006.
Idioma: | Inglês
Conteúdo: | Consumption of freshly-cut horticultural products has increased in the last few years. The principal restraint to using freshly-cut carambola is its susceptibility to tissue-browning, due to polyphenol oxidase-mediated oxidation of phenolic compounds present in the tissue. The current study investigated the susceptibility to browning of star fruit slices  (Averrhoa carambola L.) of seven genotypes (Hart, Golden Star, Taen-ma, Nota-10, Malásia, Arkin, and Fwang Tung). Cultivar susceptibility to browning as measured by luminosity (L*) varied significantly among genotypes. Without catechol 0.05 M, little changes occurred on cut surface of any cultivars during 6 hour at 25°C, 67% RH. Addition of catechol led to rapid browning, which was more intense in cvs. Taen-ma, Fwang Tung, and Golden Star, with reduction in L* value of 28.60%, 27.68%, and 23.29%, respectively. Browning was more intense in the center of the slices, particularly when treated with catechol, indicating highest polyphenol oxidase (PPO) concentration. Epidermal browning, even in absence of catechol is a limitation to visual  acceptability and indicates a necessity for its control during carambola processing. Care must be given to appropriate selection of cultivars for fresh-cut processing, since cultivar varied in browning susceptibility in the presence of catechol.
Palavras-Chave: | Averrhoa carambola L; Catecol; cathecol; fresh-cut; minimally processed; Minimamente processado; polyphenol oxidase.
Thesagro: | Polifenoloxidase.
Categoria do assunto: | --
Registro original: | Embrapa Agroindústria Tropical (CNPAT)

Exemplares:

CNPMF - (22744-1) - UPC - AP - -- -  -  -  - DIS
CNPAT - (15457-1) - UPC - AP - DD -  -  - 2018.0091 - DIS