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Relative expression of (A) CAT gene, (B) HSP70 gene, (C) HSPS 80 gene, and (D) HSP90 gene of tomato seedlings untreated (control group) and treated with chilling stress and ascorbic acid. Data plotted as mean relative gene expression and bars represent the standard error for mean. Bars expressed with different letters are significantly different according to DMRTs at p < 0.05.
