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. 2015 Sep 17;6:759. doi: 10.3389/fpls.2015.00759

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Copyright © 2015 Wang, Liu, Chen, Yin, Li and Deng.

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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Effects of silicon (0.83 mM) and salt stress (65 mM) on polyamines (PAs) concentrations (putrescine, Put; spermidine, Spd; and spermine, Spm; (A) Free Put; (B) Free Spd; (C) Free Spm; (D) Total free polyamines; (E) Conjugated Put; (F) Conjugated Spd; (G) Conjugated Spm; (H) Total conjugated polyamines). Root tips (1 cm) were used for measurement. All parameters were measured after 1.5, 3.5, and 7.5 days of salt treatment. Vertical bars represent the standard deviations (n = 3). Different letters at the same time point represent significant differences (p < 0.05) between the results of the treatments. Sharing the same letter indicates no significant difference.