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Expression levels of stress-relative genes in WT and transgenic lines (L2 and L8) under drought stress. Six-week-old seedlings were withheld water for 10 days. The tobacco leaves were sampled to extract the total RNA to synthesize cDNA. Expression levels of nine genes were detected. NtActin was used as the internal control. Error bars represent SD and values with different letters are significant at P < 0.05.
