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

Figure 4.

Figure 4

Changes in proline content of LY1306, ZhongYan 100 (ZY100) and Hong Hua Da Jin Yuan (HHDJY) tobacco strains after (a) being treated with 15% PEG-6000 for 16 h and 24 h and (b) withholding water supply. 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.