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. 2017 Dec 12;7:17442. doi: 10.1038/s41598-017-17045-2

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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 morphological responses of LY1306, ZhongYan 100 (ZY100) and Hong Hua Da Jin Yuan (HHDJY) tobacco strains under drought stress. (a) Seedlings treated with 25% PEG for 5 h; (b) Seedlings treated with 15% PEG for 16 h or 24 h; (c) Seedlings subjected to mild drought (MD) and severe drought (SD) treatments. (d) Changes of leaf water potential in three vatieties after 15% PEG treatment for 0, 16 and 24 h. (e) Changes of chlorophyll content in three vatieties after 15% PEG treatment for 0, 16 and 24 h. Results are expressed as the mean ± standard error from three replication experiments. *P < 0.05, **P < 0.01 and ***P < 0.001 compared with the corresponding control groups.