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. 2021 Jan 13;11:612376. doi: 10.3389/fpls.2020.612376

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Copyright © 2021 Kyratzis, Antoniou, Papayiannis, Graziani, Rouphael and Kyriacou.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Box plots showing the variation across different agro-environmental zones for total phenolics extracted with MeOH-HCL in 2018 (A) and in 2019 (B) for antioxidant activity (DPPH) in 2018 (C) and in 2019 (D) and for gallic acid concentration (E) and total organic acids (F) in 2018. Outlier codes refer to their structure cluster.