Analysis of metabolic differences in maize in different growth stages under nitrogen stress based on UPLC-QTOF-MS.

The relative content of trehalose and sucrose produced by the sugar metabolism process was higher under the SN treatment than under the DN treatment and showed a trend of decreasing and then increasing under both treatments as the plants grew and developed, while the pyruvate produced by the glycolytic process produced lactate under the action of lactate dehydrogenase, and the change in its relative content was consistent with the trend of trehalose content.

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With the growth process (the increase of stress time), the relative content of N, N-dimethylarginine showed an increasing trend under both conditions, while the relative content of L-malic acid showed a decreasing trend and the relative content of succinic acid showed a decreasing trend followed by an increasing trend.

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