Noctor Graham, Mhamdi Amna, Foyer Christine H
Institut de Biologie des Plantes, Unité Mixte de Recherche 8618 Centre National de la Recherche Scientifique, Université de Paris-Sud, 91405 Orsay cedex, France.
Plant Physiol. 2014 Apr;164(4):1636-48. doi: 10.1104/pp.113.233478. Epub 2014 Mar 7.
Drought is considered to cause oxidative stress, but the roles of oxidant-induced modifications in plant responses to water deficit remain obscure. Key unknowns are the roles of reactive oxygen species (ROS) produced at specific intracellular or apoplastic sites and the interactions between the complex, networking antioxidative systems in restricting ROS accumulation or in redox signal transmission. This Update discusses the physiological aspects of ROS production during drought, and analyzes the relationship between oxidative stress and drought from different but complementary perspectives. We ask to what extent redox changes are involved in plant drought responses and discuss the roles that different ROS-generating processes may play. Our discussion emphasizes the complexity and the specificity of antioxidant systems, and the likely importance of thiol systems in drought-induced redox signaling. We identify candidate drought-responsive redox-associated genes and analyze the potential importance of different metabolic pathways in drought-associated oxidative stress signaling.
干旱被认为会引发氧化应激，但氧化剂诱导的修饰在植物对水分亏缺的响应中的作用仍不清楚。关键的未知因素是在特定细胞内或质外体部位产生的活性氧（ROS）的作用，以及复杂的网络抗氧化系统在限制ROS积累或氧化还原信号传递中的相互作用。本综述讨论了干旱期间ROS产生的生理方面，并从不同但互补的角度分析了氧化应激与干旱之间的关系。我们探讨氧化还原变化在植物干旱响应中涉及的程度，并讨论不同ROS产生过程可能发挥的作用。我们的讨论强调了抗氧化系统的复杂性和特异性，以及硫醇系统在干旱诱导的氧化还原信号传导中的潜在重要性。我们鉴定了候选的干旱响应氧化还原相关基因，并分析了不同代谢途径在干旱相关氧化应激信号传导中的潜在重要性。
