Exogenous melatonin alleviates copper stress in apple rootstock M9T337 by regulating the antioxidant system and carbon-nitrogen metabolism.

There was a highly significant positive correlation between the total 15 N accumulation and root length, root tips, root activity, Glu content (leaves and roots), and solule protein (leaves and roots) (Mental’s r > 0.85, P < 0.01). 4 Discussion 4.1 Melatonin alleviates copper stress inhibition of apple rootstock growth by improving root function As the primary organ for plants to perceive environmental stress, the morphology and activity of roots directly determine the plant’s ability to absorb nutrients and water.

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