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. 2017 Sep 8;8:1580. doi: 10.3389/fpls.2017.01580

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Copyright © 2017 Zhang, Liu, Zhang, Yuan, Wang, Yang, Ma, Liu, Jiang and Liang.

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) or licensor 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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Activation of antioxidant enzymes in response to alkaline stress in rice roots. (A) Superoxide (SOD), (B) peroxidase (POD), (C) catalase (CAT), and (D) ascorbate peroxidase (APX). Two-week-old rice seedlings were grown under unstressed control (open columns) or alkaline-stressed (filled columns) conditions for 3 days. Asterisks denote a significant difference to the control plants (^∗P < 0.05, ^∗∗P < 0.01).