Ascorbic Acid in Plant Growth, Development and Stress Tolerance
Ascorbic Acid in Plant Growth, Development and Stress Tolerance
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DOI：
10.1007/978-3-319-74057-7
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
M. A. Hossain;S. Munné‐Bosch;D. Burritt;P. Díaz‐Vivancos;M. Fujita;A. Lorence
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文献类型：
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作者：
M. A. Hossain;S. Munné‐Bosch;D. Burritt;P. Díaz‐Vivancos;M. Fujita;A. Lorence
前言抗坏血酸（阿萨），即维生素C，是动植物体内含量最丰富的水溶性抗氧化剂之一。在植物中，阿萨作为一种重要的氧化还原缓冲剂，调节植物的生长、发育、信号转导和抗逆性等多种生理过程。近年来，人们对阿萨的生物合成、氧化、循环、转运和氧化还原调节等方面的研究为了解AsA介导的植物生长发育和植物抗逆性机制提供了丰富的信息。由于植物性食物构成了人类饮食中阿萨的主要来源，近年来，增加植物中阿萨含量以改善其营养价值的可能性也受到了相当大的关注。活性氧（ROS）和阿萨之间的关系对于调节细胞信号传导和代谢过程的重要性已经被很好地确立。与动物体内合成阿萨的单一途径不同，植物体内合成阿萨的途径多种多样，这反映了植物代谢的多样性以及阿萨对植物健康的重要性。植物细胞中阿萨含量的任何变化都会对生长、发育和胁迫耐受性产生多种影响，因为阿萨参与氧化还原信号传导、细胞周期调节、酶功能以及防御和胁迫相关基因的表达。作为Foyer-Halliwell-Asada循环的主要组分，阿萨通过单独或与谷胱甘肽（GSH）和其他抗氧化剂合作控制ROS解毒来帮助调节氧化应激耐受性。虽然在过去的几年里，关于阿萨在提高环境胁迫耐受性方面的多重作用已经取得了巨大的进展，但操纵植物中的阿萨含量作为提高胁迫耐受性和某些作物植物的营养价值的手段仍然是一个不断发展的研究领域。
Preface l-Ascorbic acid (AsA), vitamin C, is one of the most abundant water-soluble antioxidants in plants and animals. In plants, AsA serves as a major redox buffer and regulates various physiological processes controlling growth, development, signal transduction and stress tolerance. Recent studies on AsA biosynthesis, oxidation, recycling, transport and redox regulation have provided a wealth of information of the mechanisms associated with AsA-mediated plant growth and development, as well as plant stress tolerance. As plant-based foods constitute the principal source of AsA in the human diet, the possibility of increasing the AsA content of plants to improve their nutritional value has also received considerable attention in recent years. The importance of the relationship between reactive oxygen species (ROS) and AsA for regulation of cell signalling and metabolic processes has been well established. In contrast to the single pathway responsible for AsA biosynthesis in animals, plants use multiple pathways to synthesize AsA, and this reflects the metabolic diversity of plants and the importance of AsA for plant health. Any changes in the AsA content of plant cells can result in a diverse range of effects on growth, development and stress tolerance, as AsA is involved in redox signalling, cell cycle regulation, enzyme functioning and the expression of defence and stress-related genes. Being a major component of the Foyer-Halliwell-Asada cycle, AsA helps to modulate oxidative stress tolerance by controlling ROS detoxification, both alone and in cooperation with glutathione (GSH) and other antioxidants. While tremendous progress has been made over the last few years regarding the multiple roles of AsA in improving environmental stress tolerance, the manipulation of the AsA contents in plants as a means to improve stress tolerance and the nutritional value of some crop plants is still an evolving area of research.