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Effects of H2S on the activities of catalase (CAT), superoxide dismutase (SOD), ascorbate peroxidase (APX), peroxidase (POD), polyphenol oxidase (PPO) activity in Lingwu Long Jujube fruits. Jujube fruits was fumigated with 0.4 mM H2S donor NaHS aqueous solution for 0–14 days, and distilled water was used as the control group. Data are expressed as mean ± SD (n = 3). FW = fresh weight.
