Spermine: Its Emerging Role in Regulating Drought Stress Responses in Plants.
Spermine: Its Emerging Role in Regulating Drought Stress Responses in Plants.
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DOI：
10.3390/cells10020261
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发表时间：
2021-01-28
期刊：
影响因子：
6
通讯作者：
Fang XW
中科院分区：
文献类型：
--
作者：
Hasan MM;Skalicky M;Jahan MS;Hossain MN;Anwar Z;Nie ZF;Alabdallah NM;Brestic M;Hejnak V;Fang XW
近年来，对精胺 (Spm) 的研究发现了许多关于这种必需多胺的新信息，特别是它能够抵消非生物胁迫造成的损害。 Spm已被证明可以保护植物免受各种环境侵害，但它是否可以预防干旱的不利影响尚未见报道。干旱胁迫增加植物内源Spm，外源施用Spm提高植物耐受干旱胁迫的能力。 Spm 在增强抗氧化防御机制、乙二醛酶系统、甲基乙二醛 (MG) 解毒以及建立对干旱引起的氧化应激的耐受性方面的作用在植物中已有详细记录。然而，酶活性和渗透压调节对Spm生物合成和代谢的影响是可变的。 Spm 与一氧化氮 (NO) 等其他分子和脱落酸、水杨酸、油菜素类固醇和乙烯等植物激素相互作用，协调发展耐旱性所需的反应。本综述重点关注严重干旱胁迫下 Spm 在植物中的作用。我们提出了模型来解释 Spm 如何与植物现有的防御机制相互作用以提高耐旱性。
In recent years, research on spermine (Spm) has turned up a lot of new information about this essential polyamine, especially as it is able to counteract damage from abiotic stresses. Spm has been shown to protect plants from a variety of environmental insults, but whether it can prevent the adverse effects of drought has not yet been reported. Drought stress increases endogenous Spm in plants and exogenous application of Spm improves the plants’ ability to tolerate drought stress. Spm’s role in enhancing antioxidant defense mechanisms, glyoxalase systems, methylglyoxal (MG) detoxification, and creating tolerance for drought-induced oxidative stress is well documented in plants. However, the influences of enzyme activity and osmoregulation on Spm biosynthesis and metabolism are variable. Spm interacts with other molecules like nitric oxide (NO) and phytohormones such as abscisic acid, salicylic acid, brassinosteroids, and ethylene, to coordinate the reactions necessary for developing drought tolerance. This review focuses on the role of Spm in plants under severe drought stress. We have proposed models to explain how Spm interacts with existing defense mechanisms in plants to improve drought tolerance.
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