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. 2017 Oct 27;7:14233. doi: 10.1038/s41598-017-14601-8

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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The activities of SOD (a), CAT (b) and POD (c) in non-irradiated (0- Gy) and irradiated (50–300 Gy) highland barley seedlings with or without Pb/Cd treatment. Control, Pb, Cd in non-irradiated (0- Gy) and irradiated (50–300 Gy) groups correspond to non-irradiated or irradiated highland barley seedlings without heavy metal treatment, with 500 µM Pb(NO₃)₂ treatment and 75 µM CdCl₂ treatment, respectively. Vertical bars represent the mean ± SD of three independent replications (n = 3). Different letters indicate significant differences among the different doses of gamma irradiation treatments in control, Pb and Cd group at p < 0.05, according to the LSD test.