Isolation and characterization of latent and active polyphenoloxidase in BRS Clara (CNPUV 154-147 x Centennial seedless) and BRS Morena (Marroo seedless x Centennial seedless) seedless table grapes

Autor(es)

Lago-Vanzela, Ellen Silva ^[1] ; Pavezzi, Fabiana Carina ^[1] ; Martin, Natalia ^[1] ; Gomes, Eleni ^[1] ; Da Silva, Roberto ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, UNESP, Lab Biochem & Appl Microbiol, BR-15054000 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Plant Physiology and Biochemistry; v. 49, n. 11, p. 1251-1258, NOV 2011.
• Citações Web of Science: 3
• Assunto(s): Polifenoloxidase Peroxidase Uva

Resumo

The seedless grapes BRS Clara and BRS Morena, developed in Brazil, are currently growing in popularity due to their premium texture and taste. However, there are no reports on the polyphenoloxidase (PPO) from these cultivars. In this paper, active and latent PPO from BRS Clara and BRS Morena seedless grapes were extracted using the non-ionic detergents Triton-X-100 (active) and Triton-X-114 (latent), and their catecholase activities were characterized. The PPO extracted using Triton-X-110 exhibited maximum activities at pH 6.0 and at 25 degrees C. Above 30 degrees C, a gradual decline in activities was noted, with complete inactivation at 60 degrees C. The PPO from grapes extracted with Triton-X-114 was activated with 0.2% of the ionic detergent sodium dodecyl sulfate (SDS), and exhibited maximum activities at pH 5.5 and at 30 degrees C. It was stable until the temperature reached 60 degrees C. (C) 2011 Elsevier Masson SAS. All rights reserved. (AU)

• Processo FAPESP: 02/08040-7 - Caracterização preliminar do extrato bruto da fruta jambolão (Syzygium cumini L.): polifenol oxidase, peroxidase e poligalacturonase
• Beneficiário: Ellen Silva Lago Vanzela
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 08/10809-3 - Seleção de leveduras com potencial enzimático para o processamento e melhoramento de vinhos paulistas
• Beneficiário: Roberto da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular