| Registro completo |
| Provedor de dados: |
Agronomy
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| País: |
Brazil
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| Título: |
The effects of storage temperature on the quality and phenolic metabolism of whole and minimally processed kale leaves
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| Autores: |
Simões, Adriano do Nascimento
Moreira, Silvino Intra
Mosquim, Paulo Roberto
Soares, Nilda de Fátima Ferreira
Puschmann, Rolf
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| Data: |
2014-11-25
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| Ano: |
2014
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| 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
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| 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.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18123
10.4025/actasciagron.v37i1.18123
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| Editor: |
Universidade Estadual de Maringá
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| Relação: |
http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18123/pdf_58
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| Formato: |
application/pdf
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| 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
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