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Attenuating the adverse aspects of water stress on wheat genotypes by foliar spray of melatonin and indole-3-acetic acid.
Physiology and Molecular Biology of Plants ( IF 3.5 ) Pub Date : 2020-08-04 , DOI: 10.1007/s12298-020-00855-6
Sara Zafar 1 , Muhammad Akhtar 2 , Shagufta Perveen 1 , Zuhair Hasnain 3 , Aansa Khalil 1
Affiliation  

Melatonin is important due to its involvement in regulation of diverse mechanisms in plants. Its presence in plants is universal and provides primary defense against environmental stresses. In this study the effect of foliarly applied indole-3-Acetic Acid (IAA) and melatonin (control, 100, 150 µg/g each) on wheat seedling growth under water deficit condition was examined. The mitigation of stress was seen in melatonin treated wheat plants facing abiotic stress, with less accumulation of the H2O2, MDA and anthocyanin. A marked decrease in chlorophyll, total soluble proteins, total soluble sugars, ascorbic acid, phenolic contents and yield- related attributes was noticed in stressed condition. Treatment with melatonin and IAA alleviated stress induced decrease in biochemical attributes, and growth of wheat plants in a dose-dependent manner. A significant increase in yield was achieved by melatonin treatments in Ujala-2016 under limited water supply. It is worthy to mention that melatonin spray at 150 µg/g followed by IAA proved to be the most pronounced treatment in the buildup of osmolytes and regulation of antioxidant defense system with increase in yield under water limited environment.

中文翻译:

通过叶面喷洒褪黑激素和吲哚-3-乙酸减轻水分胁迫对小麦基因型的不利影响。

褪黑激素很重要,因为它参与了植物多种机制的调节。它在植物中的存在是普遍的,并提供抵御环境压力的主要防御。在这项研究中,研究了在缺水条件下叶面喷施 indole-3-Acetic Acid (IAA) 和褪黑激素(对照,分别为 100、150 µg/g)对小麦幼苗生长的影响。在面临非生物胁迫的褪黑激素处理的小麦植物中看到胁迫减轻,H 2 O 2 的积累较少、MDA 和花青素。在压力条件下注意到叶绿素、总可溶性蛋白质、总可溶性糖、抗坏血酸、酚类含量和产量相关属性的显着减少。用褪黑激素和 IAA 处理以剂量依赖性方式减轻应激诱导的生化属性下降和小麦植物的生长。在 Ujala-2016 的供水有限的情况下,褪黑激素处理实现了产量的显着增加。值得一提的是,喷洒 150 µg/g 的褪黑激素,然后喷洒 IAA,被证明是最显着的处理方法,可用于渗透质的积累和抗氧化防御系统的调节,并在缺水环境下增加产量。
更新日期:2020-08-04
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