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Effects of Melatonin on the Physiological Characteristics of Maize Seedlings under Different Salt Stress

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DOI: 10.38007/Proceedings.0001960


Lingli Liu, Xiuping Tian, Qiu Zhao, Chunyang Xiang and Shengwei Guo

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Xiuping Tian


Abstract: In order to reveal the effect of melatonin on the anti-salt stress capacity of maize seedlings under different salt stress, the antioxidant enzyme activity, soluble protein, soluble sugar, proline (PRO) and malondialdehyde (MDA) content of maize seedlings treated with melatonin (1mmol/L) at 5 different salty soil content were explored (The soil salt content is 0.04%, 0.20%, 0.35%, 0.52% and 0.68%, respectively). The results showed that when the salt content was 0.20% and 0.35%, the content of MDA in the leaves of the melatonin-treated maize seedlings was significantly lower than that of the untreated, and the content of PRO increased significantly. The soluble sugar content, catalase (CAT) and peroxidase (POD) activity in the leaves of melatonin-treated maize seedlings increased significantly when the salt content in soil was 0.04%, 0.20%, 0.35% and 0.52%, the soluble protein content in the leaves of melatonin-treated maize seedlings will be significantly increased in the case of soil salt content of 0.04%, 0.20%, and 0.35%, and when the salt content was 0.20%, 0.35% and 0.52%, the activity of the superoxide dismutase (SOD) in melatonin-treated maize seedling leaves was also significantly increased, indicating that melatonin can reduce salt damage and improve the salt resistance of seedlings by increasing the antioxidant enzyme activity of maize seedling leaves under different salt stress and osmotic balance regulation.


Keywords: Salt Stress; Melatonin Treatment; Maize Seedlings; Physiological Characteristics