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Melatonin as a regulatory hub of plant hormone levels and action in stress situations
Plant Biology ( IF 4.2 ) Pub Date : 2020-10-23 , DOI: 10.1111/plb.13202
M. B. Arnao 1 , J. Hernández‐Ruiz 1
Affiliation  

Melatonin, a molecule first discovered in animal tissues, plays an important role in multiple physiological responses as a possible plant master regulator. It mediates responses to different types of stress, both biotic and abiotic. Melatonin reduces the negative effects associated with stressors, improving the plant response by increasing plant stress tolerance. When plants respond to stress situations, they use up a large amount of plant resources through a set of perfectly synchronized actions. Responses mediated by melatonin use the plant’s hormones to, after adequate modulation, counteract and overcome the negative action of the stressor. In this paper, we review melatonin–plant hormone relationships. Factors that trigger the stress response and the central role of melatonin are analysed. An extensive analysis of current studies shows that melatonin modulates the metabolism of plant hormones (biosynthesis and catabolism), the rise or fall in their endogenous levels, the regulation of signalling elements and how melatonin affects the final response of auxin, gibberellins, cytokinins, abscisic acid, ethylene, salicylic acid, jasmonates, brassinosteroids, polyamines and strigolactones. Lastly, a general overview of melatonin’s actions and its regulatory role at a global level is provided and proposals for future research are made.

中文翻译:

褪黑素作为植物激素水平和逆境作用的调节枢纽

褪黑素是最早在动物组织中发现的一种分子,在多种生理反应中起着重要的作用,可能是植物的主调节剂。它介导对不同类型的生物和非生物胁迫的反应。褪黑素减少了与胁迫源相关的负面影响,通过增加植物的胁迫耐受性改善了植物的反应。当植物对压力状况做出响应时,它们会通过一系列完全同步的动作消耗大量植物资源。褪黑激素介导的反应使用植物的激素,经过适当的调节后,可以抵消并克服压力源的负面作用。在本文中,我们回顾了褪黑激素与植物激素的关系。分析了触发应激反应和褪黑激素的核心作用的因素。对当前研究的广泛分析表明,褪黑素调节植物激素的代谢(生物合成和分解代谢),内源性水平的升高或降低,信号传导元件的调节以及褪黑素如何影响植物生长素,赤霉素,细胞分裂素,脱落酸的最终反应酸,乙烯,水杨酸,茉莉酸酯,油菜素甾醇,多胺和松香内酯。最后,提供了褪黑激素作用及其在全球范围内的调节作用的一般概述,并提出了未来研究的建议。油菜素类固醇,多胺和松香内酯。最后,提供了褪黑激素作用及其在全球范围内的调节作用的一般概述,并提出了未来研究的建议。油菜素类固醇,多胺和松香内酯。最后,提供了褪黑激素作用及其在全球范围内的调节作用的一般概述,并提出了未来研究的建议。
更新日期:2020-12-14
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