Sharma Shanti S, Dietz Karl-Josef
Department of Biosciences, Himachal Pradesh University, Shimla 171 005, India.
Trends Plant Sci. 2009 Jan;14(1):43-50. doi: 10.1016/j.tplants.2008.10.007. Epub 2008 Dec 11.
The relationship between cellular redox imbalances leading to oxidative stress and metal toxicity in plants has been studied intensely over the past decades. This interdependency was often considered to reflect a rather indirect metal effect of cellular disregulation and progressive secondary damage development. By contrast, recent experiments revealed a clear relationship between metal stress and redox homeostasis and antioxidant capacity. Analysis of plants expressing targeted modifications of components of the antioxidant system, the comparison of closely related plant species with different degrees of toxic metal sensitivity and effector studies with, for instance, salicylic acid have established a link between the degree of plant tolerance to metals and the level of antioxidants.
在过去几十年里，人们对导致植物氧化应激的细胞氧化还原失衡与金属毒性之间的关系进行了深入研究。这种相互依存关系通常被认为反映了细胞调节紊乱和继发性损伤逐步发展的一种相当间接的金属效应。相比之下，最近的实验揭示了金属胁迫与氧化还原稳态及抗氧化能力之间的明确关系。对表达抗氧化系统成分靶向修饰的植物进行分析、对具有不同程度有毒金属敏感性的近缘植物物种进行比较以及使用水杨酸等进行效应研究，都确立了植物对金属的耐受程度与抗氧化剂水平之间的联系。
