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Antioxidant activities and contents of polyphenol oxidase substrates from pericarp tissues of litchi fruit
- Source :
-
Food Chemistry . Mar2010, Vol. 119 Issue 2, p753-757. 5p. - Publication Year :
- 2010
-
Abstract
- Abstract: The experiments were performed to extract and purify substrates for polyphenol oxidase (PPO) from pericarp tissue of postharvest litchi fruit. Two purified PPO substrates were identified as (−)-epicatechin and procyanidin A2. The antioxidant properties of two PPO substrates were further evaluated in the present study. Variation in the content of the major substrate (−)-epicatechin of litchi fruit during storage at 25°C was analysed using the HPLC-UV method. The results showed that (−)-epicatechin exhibited stronger antioxidant capability than procyanidin A2, in terms of reducing power and scavenging activities of DPPH radical, hydroxyl radical and superoxide radical. Furthermore, (−)-epicatechin content in pericarp tissue tended to decrease with increasing skin browning index of litchi fruit during storage at 25°C. Thus, these two compounds can be used as potential antioxidants in litchi waste and the fresh pericarp tissue of litchi fruit exhibited a better utilisation value. [Copyright &y& Elsevier]
- Subjects :
- *ANTIOXIDANTS
*POLYPHENOL oxidase
*PLANT cells & tissues
*LITCHI
*FRUIT
*FOOD storage
Subjects
Details
- Language :
- English
- ISSN :
- 03088146
- Volume :
- 119
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Food Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 44831409
- Full Text :
- https://doi.org/10.1016/j.foodchem.2009.07.025