Journal
FOOD CHEMISTRY
Volume 127, Issue 2, Pages 481-486Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2011.01.027
Keywords
Polyphenoloxidase; Peroxidase; Protein; Grape; Crimson Seedless; Ripening; Weather conditions
Funding
- Consejeria de Agricultura y Agua de la Region de Murcia [PFE-agri-uva/29/06]
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The evolution of degrees Brix, protein content, polyphenoloxidase activity and peroxidase activity during the ripening of Crimson Seedless table grape was studied in three consecutive years (2006, 2007 and 2008). The total protein content was determined according to Bradford's dye binding method, and polyphenoloxidase (PPO) and peroxidase (POD) were extracted using Triton X-114 and characterised using spectrophotometric methods. The year had a statistically significant effect on all the studied parameters and there was an interannual correlation in the evolution of protein, PPO, POD and degrees Brix. All the studied parameters were statistically correlated, except POD activity with protein content. Weather conditions during the ripening period had a greater effect on protein content than PPO and POD activity. (C) 2011 Elsevier Ltd. All rights reserved.
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