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. 2017 Feb 14;8:203. doi: 10.3389/fpls.2017.00203

FIGURE 5.

FIGURE 5

Effect of exogenous NO on PAs content in the leaves of tomato under chilling stress. (A) Put content, (B) Spd content, (C) Spm content. Tomato seedlings were treated with 200 μM SNP or distilled water (control), and exposed to chilling stress at 4°C (0, 12, and 24 h), and recovery treatment (25°C; 10 h). Data represent the mean ± SE of three independent experiments and asterisks represent significant differences compared to control at P ≤ 0.05 according to Duncan’s multiple range test.