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首页> 外文会议>International Conference on Advances in Materials, Mechatronics and Civil Engineering >Effects of Exogenous Melatonin on Growth and Antioxidant System of Lettuce Seedlings under Salt Stress
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Effects of Exogenous Melatonin on Growth and Antioxidant System of Lettuce Seedlings under Salt Stress

机译：外源褪黑素对盐胁迫下莴苣幼苗生长和抗氧化体系的影响

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摘要

The glass lettuce was made as material, the effect of different concentrations (0, 50, 100, 150, 200 μmol·L~(-1)) of exogenous melatonin on growth, antioxidant enzyme activity and osmotica of lettuce seedlings under salt stress was studied. The results showed that the root length, stem diameter, and dry fresh weight of lettuce sprayed with melatonin were higher than those of the control. Within a certain concentration range, the activities of antioxidant enzymes POD, SOD and CAT increased with the increase of melatonin concentration. The soluble protein content increased but the MDA content decreased, which maintaining the balance of intracellular reactive oxygen metabolism and preventing membrane lipid peroxidation. Therefore, spraying the exogenous melatonin could increase the resistance of lettuce to salt stress, and the best effect was obtained when the concentration was 100 μmol·L~(-1).
机译：将玻璃莴苣制成材料，外源褪黑素对生长的不同浓度（0,50,100,150,200μmol·L〜（-1））的效果，盐胁迫下莴苣幼苗的抗氧化酶活性和渗透性研究过。结果表明，用褪黑素喷洒的莴苣的根长，茎直径和干燥的鲜重量高于对照的莴苣。在一定浓度范围内，随着褪黑素浓度的增加，抗氧化酶荚，SOD和猫的活性增加。可溶性蛋白质含量增加但MDA含量降低，从而保持细胞内反应性氧代谢和预防膜脂质过氧化的平衡。因此，喷涂外源褪黑激素可以增加莴苣对盐胁迫的抗性，并且当浓度为100μmol·L〜（-1）时获得的最佳效果。

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