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Journal of Food Quality
Volume 2017 (2017), Article ID 7214747, 8 pages
https://doi.org/10.1155/2017/7214747
Research Article

Changes in the Total Polyphenolic Content and Antioxidant Capacities of Perilla (Perilla frutescens L.) Plant Extracts during the Growth Cycle

1National Research Council, Institute of Science of Food Production, 10095 Grugliasco, Italy
2Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, 10-747 Olsztyn, Poland

Correspondence should be addressed to Ryszard Amarowicz; lp.nytzslo.nap@zciworama.r

Received 7 February 2017; Accepted 9 April 2017; Published 8 May 2017

Academic Editor: Raul Ferrer-Gallego

Copyright © 2017 Francesco Gai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Changes in the total polyphenolics and antioxidative capacity of the perilla (Perilla frutescens L.) plant, during the growth cycle, have been analyzed in this study. These parameters were evaluated at five morphological stages. The extracts characterized by the highest total phenolic compound content were obtained at the full flowering stage. The phenolic compound profile was characterized by the presence of three major compounds, with rosmarinic acid being the most abundant. Moreover, their contents were significantly different according to the growth stage. High Trolox equivalent antioxidant capacity values were found for the last two growth stages. The lowest ferric-reducing antioxidant power value was observed for the medium vegetative stage. The highest antiradical activity against DPPH was observed for extracts obtained from the early vegetative stage. The antioxidant activity changes during the growth cycle, and this change may be useful to determine the optimal harvest time.