Ashraf M
Department of Botany, University of Agriculture, Faisalabad, Pakistan.
Biotechnol Adv. 2009 Jan-Feb;27(1):84-93. doi: 10.1016/j.biotechadv.2008.09.003. Epub 2008 Oct 11.
Salt stress causes multifarious adverse effects in plants. Of them, production of reactive oxygen species (ROS) is a common phenomenon. These ROS are highly reactive because they can interact with a number of cellular molecules and metabolites thereby leading to a number of destructive processes causing cellular damage. Plants possess to a variable extent antioxidant metabolites, enzymes and non-enzymes, that have the ability to detoxify ROS. In the present review, the emphasis of discussion has been on understanding the role of different antioxidants in plants defense against oxidative stress caused by salt stress. The role of different antioxidants as potential selection criteria for improving plant salt tolerance has been critically discussed. With the advances in molecular biology and availability of advanced genetic tools considerable progress has been made in the past two decades in improving salt-induced oxidative stress tolerance in plants by developing transgenic lines with altered levels of antioxidants of different crops. The potential of this approach in counteracting stress-induced oxidative stress has been discussed at length in this review.
盐胁迫会对植物造成多种不利影响。其中，活性氧（ROS）的产生是一种常见现象。这些ROS具有高度反应性，因为它们能与许多细胞分子和代谢产物相互作用，从而引发一系列导致细胞损伤的破坏过程。植物在不同程度上拥有抗氧化代谢产物、酶和非酶物质，它们有能力清除ROS。在本综述中，讨论的重点是了解不同抗氧化剂在植物抵御盐胁迫引起的氧化应激中的作用。还对不同抗氧化剂作为提高植物耐盐性潜在选择标准的作用进行了批判性讨论。随着分子生物学的发展和先进遗传工具的出现，在过去二十年里，通过培育不同作物抗氧化剂水平改变的转基因品系，在提高植物对盐诱导氧化应激的耐受性方面取得了相当大的进展。本综述详细讨论了这种方法在对抗胁迫诱导的氧化应激方面的潜力。
