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Effect of chilling stress on relative expression of chlorophyll biosynthetic genes HEMA (A), CHLH (B), PORA (C), PORB (D), and DVR (E). The expression levels of genes at 28 °C after 48 h of light exposure were set to 1. OsACTIN1 was used as an internal standard. Values are means ± SD from three independent biological replicates. Different letters indicate significant differences according to Duncan’s multiple range tests (p < 0.05).
