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Exogenous Melatonin Improves Fruit Quality Features Health Promoting Antioxidant Compounds and Yield Traits in Tomato Fruits under Acid Rain Stress

机译:外源褪黑素可改善酸雨胁迫下番茄果实的品质特性促进健康的抗氧化化合物并提高产量

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摘要

Acid rain is a serious worldwide environmental problem which reduces the growth and yield of crops. Melatonin, as a pleiotropic molecule has been known to improve stress tolerance by limiting the oxidative damage of plants exposed to adverse environments. However, the role of exogenous melatonin particularly on the yield and antioxidant compounds in tomato fruits under abiotic stress condition remains inexpressible. This observation aims to identify the influence of melatonin treatment under simulated acid rain (SAR) condition on fruit qualities, phenolics, flavonoids, and carotenoids concentration in fruits, and yield of tomatoes. Our study results showed that the fruits of SAR-stressed plants had higher quality traits and antioxidant bioactive compounds by increasing antioxidant activities against SAR-induced oxidative stress compared with fruits of control plants. Nonetheless, these improvements to antioxidant activities in fruits under SAR-condition remained unable to prevent the reduction of the yield. However, SAR-stressed plants treated by melatonin exhibited upgradation on the fruit quality traits, antioxidant compounds and yield attributes through accelerating oxidant-scavenging antioxidant actions in fruits compared with fruits of SAR-stressed plants. Meanwhile, our results suggest that exogenous melatonin plays an important role in improvement of bioactive compounds and yield traits in tomato fruits through regulating antioxidant system.
机译:酸雨是一个严重的全球性环境问题,会降低农作物的生长和单产。已知褪黑激素作为多效性分子通过限制暴露于不利环境的植物的氧化损伤来改善胁迫耐受性。然而,在非生物胁迫条件下,外源褪黑素特别是对番茄果实的产量和抗氧化剂的作用仍然无法表达。该观察旨在确定在模拟酸雨(SAR)条件下褪黑激素处理对水果品质,果实中的酚类,类黄酮和类胡萝卜素浓度以及番茄产量的影响。我们的研究结果表明,与对照植物的果实相比,SAR胁迫的植物果实通过提高抗SAR诱导的氧化胁迫的抗氧化活性,具有更高的品质性状和抗氧化生物活性化合物。然而,SAR条件下对水果抗氧化活性的这些改善仍然不能阻止产量的降低。然而,褪黑激素处理的SAR胁迫植物与SAR胁迫植物相比,通过加速果实中的清除氧化剂的抗氧化作用,显示出果实品质性状,抗氧化剂化合物和产量属性的提高。同时,我们的结果表明,外源褪黑素通过调节抗氧化剂体系,在改善番茄果实的生物活性成分和产量性状中起重要作用。

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