Data/hora: 08/06/2024 13:09:18

Provedor de dados: | 1
País: | Brazil
Título: | The effects of storage temperature on the quality and phenolic metabolism of whole and minimally processed kale leaves
Autores: | Simões, Adriano do Nascimento; Moreira, Silvino Intra; Mosquim, Paulo Roberto; Soares, Nilda de Fátima Ferreira; Puschmann, Rolf.
Data: | 2014-11-25
Ano: | 2014
Palavras-chave: | Brassica oleraceae cv. acephala; Escurecimento enzimático; Peroxidase; Polifenol oxidase; Fenilalanina amônioliase Fisiologia Pós-colheita Ciências Agrárias: 50000004; Fisiologia de Plantas Cultivadas: 50103067 Brassica oleracea cv. acephala; Enzymatic browning; Peroxidase; Polyphenol oxidase; Phenylalanine ammonia-lyase Fisiologia Pós-Colheita.
Resumo: | We studied the effects of storage temperature on the activities of phenylalanine ammonia-lyase (PAL), peroxidase (POD) and polyphenol oxidase (PPO) in minimally processed kale (Brassica oleracea var. acephala) that was stored for 15 and 9 days at 5 ± 1ºC and 10 ± 1ºC, respectively. The main visual evidence for quality loss in whole leaves was yellowing and loss of turgescence. Minimally processed leaves presented significant browning, indicating increased POD and PPO activities. The PAL activity in minimally processed leaves stored at 5ºC was fourfold higher than that of whole leaves after two days of storage. We showed that minimal processing influenced PAL, POD and PPO activities. The activity of all enzymes studied increased during storage, indicating that changes in phenolic metabolism play an important role in the decline of kale quality. PAL activity increased rapidly at the beginning of storage and exhibited a reduced rate of increase over time, while the PPO and POD activities increased continuously over time. The storage at 5 ° C was a great ally in delaying changes in phenolic metabolism; however, the absolute PAL activity was higher at 5 than at 10ºC.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18123

10.4025/actasciagron.v37i1.18123

Editor: | Universidade Estadual de Maringá
Relação: | http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18123/pdf_58
Formato: | application/pdf

Fonte:

Acta Scientiarum. Agronomy; v. 37, n. 1 (2015); 101-107

Acta Scientiarum. Agronomy; v. 37, n. 1 (2015); 101-107

1807-8621

1679-9275