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. 2015 Oct 12;6:280. doi: 10.3389/fphys.2015.00280

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Copyright © 2015 Li, Zhang, Peng, Wang, Peng, He, Zhang, Ma, Huang and Yan.

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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Antioxidant activities as affected by polyamines (PA) under PEG-induced water stress. SOD (A), GPOX (B), CAT (C), and APX (D) The detached leaves of white clover were pre-treated with distilled water for 1 h to eliminate wound stress and then treated for 8 h as follows: 1, distilled water (control); 2, 15% PEG; 3, 15% PEG + 100 μM dicyclohexylamine (DCHA); 4, 15% PEG + 100 μM DCHA + 20 μM Spd. Means of six independent samples are presented. Bars represent standard errors. The same letter indicates no significant difference (LSD) at P < 0.05.