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. 2017 Jul 19;8:1284. doi: 10.3389/fpls.2017.01284

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Copyright © 2017 Si, Wang, Wu, Zhao, Zhang, Huang, Cai, Zhou, Dai, Zhu and Jiang.

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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Effect of mechanical wounding on activities of nitrate reductase (NR) (A) and nitric oxide synthase (NOS) (B) in local (fourth) and systemic (fifth) leaves. The local leaves were wounded and then both the local and systemic leaves were collected for analyzing the activities of NR and NOS at 3 and 18 h after wounding, respectively. Data are means ± SD of three different replicates. Means denoted by the same letter did not significantly differ at P < 0.05 for each leaf according to Tukey’s test.