Enzymatic activity and antioxidant capacity in mint (Mentha piperita L.) under refrigerated storage.
Keywords:peroxidase, polyphenol oxidase, superoxide dismutase, catalase, ascorbic acid.
The objective of this investigation was to study the effect of low temperatures over the enzymatic activity and antioxidant capacity in mint (Mentha piperita L.), behavior was quantified during storage at 6 and 10°C with respect to a control treatment (at room temperature), for this purpose, a laboratory experiment was conducted during a spring-summer cycle of 2011 at the University Autonomous of Chapingo, Texcoco, Mexico. The activity of enzymes, such as peroxidase (POD), polyphenol oxidase (PPO), superoxide dismutase (SOD) and catalase (CAT), was determined; as well as the antioxidant capacity (AC), total phenol (TP) and vitamin C (VC) content. The main result found is that the enzymatic activity of POD increased from 194,72 to 306.29 U/g of FW (fresh weight) at 10°C; the antioxidant activity also increased from 262,57 to 327,32 mm TEAC/g of WF at the same temperature. On the other hand, at 6°C and 10°C the contents of WF and VC increased, but the effect on the activity of SOD was inverse as it decreased from 53,68 to 26,22 U/g of WF. The treatment room temperature contributes to an increased activity of the PPO (90,02 U/g of WF). The use of refrigeration increased enzymatic activity of POD, PT contents and VC. Also it was found that the SOD activities decreased and the AC was greatly affected at a 10°C storage temperature.
How to Cite
1. Proposed policy for open access journals
Authors who publish in this journal accept the following conditions:
a. Authors retain the copyright and assign to the journal the right to the first publication, with the work registered under the attribution, non-commercial and no-derivative license from Creative Commons, which allows third parties to use what has been published as long as they mention the authorship of the work and upon first publication in this journal, the work may not be used for commercial purposes and the publications may not be used to remix, transform or create another work.
b. Authors may enter into additional independent contractual arrangements for the non-exclusive distribution of the version of the article published in this journal (e.g., including it in an institutional repository or publishing it in a book) provided that they clearly indicate that the work was first published in this journal.
c. Authors are permitted and encouraged to publish their work on the Internet (e.g. on institutional or personal pages) before and during the review and publication process, as it may lead to productive exchanges and faster and wider dissemination of published work (see The Effect of Open Access).