Differences at P < .05 were thought to be significant, and differences at P < .01 were thought to be highly significant. 3.
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Exogenous melatonin confers cold tolerance in rapeseed (<i>Brassica napus</i> L.) seedlings by improving antioxidants and genes expression.
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The sentences
With the decrease in temperature, the SOD activity of the control group and MEL pretreated seedlings showed a trend of first increasing and then decreasing.