The net photosynthetic rate (Pn) showed a trend of first increasing and then decreasing.
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Physiological Response of <i>Citrus reticulata</i> Blanco var. Gonggan Seedlings to High-Temperature Stress.
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The sentences
Peroxidase activity exhibited an increasing trend as the temperature increased, and there was a significant difference ( p < 0.05) between the peroxidase activity at 22 °C and 45 °C.
When plants were subjected to high-temperature stress at 40 °C, the net photosynthetic rate showed a significant increase compared to the control group at 22 °C, but in a 45 °C stress environment, the Pn showed a decreasing trend.