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Lisa Tang, Shweta Chhajed, Tripti Vashisth, Mercy A. Olmstead, James W. Olmstead and Thomas A. Colquhoun

maintaining their scavenging activities were upregulated in buds of HC-treated trees according to the RNA-seq results ( Table 3 ). Among them were superoxide dismutase, catalase, peroxidase superfamily protein, ascorbate peroxidase, thioredoxin

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free radicals. The activities of POD, ascorbate peroxidase (APX), monodehydroascorbate reductase (MDHAR) were lower in chilled fruit than in controls. This may explain why chilled fruit had high H 2 O 2 levels after 4 days storage. Evaluation of Fruit

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ascorbic acid, β-carotene, and potassium. ‘Orange Delight’ and ‘Orange Dew’ were also among the cultivars with the highest activities of ascorbate peroxidase (EC 1.15.1.1), catalase (EC1.11.1.6), and superoxide dismutase (EC 1.15.1.1). These two cultivars

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stored at 20 °C ripened normally, but rapidly lost quality due to ethanol accumulation and softening. Activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), and catalase (CAT), enzymes directly related to ROS scavenging increased during