Spraying KH₂PO₄ Alleviates the Damage of Spring Low-Temperature Stress by Improving the Physiological Characteristics of Wheat Flag Leaves.

At 0–12 DALTT, the Rubisco activity in the flag leaves of the YN19 and XM26 via LT2 showed an increasing trend compared to LT1, rising by 4.9% and 4.8%, respectively, while the PEPC activity in LT2 increased by 4.5% and 3.8%, respectively, compared to LT1. 2.6.

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The antioxidant enzyme activity (SOD, POD, CAT) in the flag leaves of the YN19 showed a negative correlation with the yield (GNPS, TGW, GYPS), and the MDA displayed a highly significant and negative correlation with the yield.

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