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. 2022 Sep 28;13:998293. doi: 10.3389/fpls.2022.998293

Figure 6.

Figure 6

Effect of exogenous MT on ASA-GSH contents in pepper leaves under LL stress. (A) Ascorbic acid (AsA) content, (B) Dehydroascorbate (DHA) content, ((C)AsA + DHA content, (D) Glutathione content, (E) Oxidized glutathione (GSSG) content, (F) GSH + GSSG content. CK (normal temperature and light, 28°C/18°C and 300 μmol photons m–2 s–1), CK+MT (normal temperature and light, 28°C/18°C and 300 μmol photons m–2 s–1, 200 μmol L-1 melatonin), LL (low–temperature combined with low–light, 15°C/5°C and 100 μmol m–2 s–1), and LL+MT (low–temperature combined with low–light, 15°C/5°C and 100 μmol m–2 s–1, 200 μmol L-1 melatonin). Vertical bars represent the standard errors of the means (three replicates). Different letters denote statistically significant differences among treatments within same time at a level of P < 0.05 by Duncan’s multiple comparison tests.