Oxidative stress and responses in Arabidopsis thaliana and Oryza sativa subjected to chilling and salinity stress

Abstract

exposed in order to assess t h e consequences of oxidative stress tolerance cannot reproduce those that will be experienced in field conditions. Only when plants with higher GR levels a n d increased glutathione synthesis capacity are grown in field trials will it be possible to make a full assessment of the benefits of engineering plants with altered glutathione metabolism.

Enhanced tolerance to salt stress in transgenic loblolly pine simultaneously expressing two genes encoding mannitol-1-phosphate dehydrogenase and glucitol-6-phosphate dehydrogenase

“…Indeed, the increase of salt tolerance or water stress tolerance of photosynthetic organisms transformed with genes for synthesis of compatible solutes had been demonstrated [7,17,32]. In addition to toxic effects, salt stress also causes the induction of oxidative stress [4]. Thus, the enhancement of enzyme activity involved in active oxygen scavenging systems may be a potent strategy to increase salt tolerance and water stress [15].…”

Evidence that differential gene expression between the halophyte, Thellungiella halophila, and Arabidopsis thaliana is responsible for higher levels of the compatible osmolyte proline and tight control of Na+ uptake in T. halophila

“…Salinity also causes disruption of ionic homeostasis which can lead to the accumulation of toxic ions such as Na + and Cl – in the cells, thereby adversely affecting cell membrane integrity, enzyme activities, nutrient acquisition and the function of the photosynthetic apparatus (Zhu 2001; Tester & Davenport 2003). A secondary effect of high salinity is the production of reactive oxygen species (ROS) that are highly destructive to lipids, nucleic acids and proteins (Burdon et al . 1996; Asada 1997; Tsugane et al .…”

Functional‐genomics‐based identification of genes that regulate Arabidopsis responses to multiple abiotic stresses

“…Abiotic stresses such as drought, high salinity and temperature extremes cause a number of deleterious effects on plants including reduced cellular osmotic potential, inhibition of cell division and expansion, reduced membrane integrity, impaired cellular function and disruption of ion homeostasis (Bray 1997; Bray, Bailey‐Serres & Weretilnyk 2000; Zhu 2001; Munns 2002; Tester & Davenport 2003). Abiotic stresses also lead to the production of reactive oxygen species (ROS), which are highly destructive to lipids, nucleic acids and proteins (Burdon et al. 1996; Asada 1997; Tsugane et al.…”