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Under drought stress, melatonin affects the antioxidant content in sorghum chloroplast: (A) AsA content; (B) DHA content; (C): DHAR content; (D): MDHAR content; (E): GSH content; (F): GSSG content; (G) GPX content; (H) GR content.CK: control treatment; D: 20% PEG; D + M: 20% PEG + 100 μmol/L of MT; D + P: 20% PEG + 100 μmol/L of CPA; columns represent mean ± SD, and, according to the LSD test, n = 3, significant differences are indicated in lower case letters (p ≤ 0.05).
