By Dariusz Latowski, Ewa Surówka (auth.), Naser A. Anjum, Ming-Tsair Chan, Shahid Umar (eds.)
Plants are sessile organisms that reside below a relentless barrage of biotic and abiotic insults. either biotic and abiotic tension components were proven to impact a variety of facets of plant procedure together with the acceleration within the formation of reactive oxygen species (ROS). The ascorbate (AsA)-glutathione (GSH) pathway is a key a part of the community of reactions concerning enzymes and metabolites with redox homes for the cleansing of ROS, and therefore to avoid the ROS-accrued oxidative harm in crops. the current booklet frequently bargains with the data received in the course of the cross-talks and inter-relationship stories at the physiological, biochemical and molecular points of the cumulative reaction of assorted parts of AsA-GSH pathway to emphasize components and their value in plant tension tolerance.
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Additional info for Ascorbate-Glutathione Pathway and Stress Tolerance in Plants
The increase of g-ECS activity and GSH level was related to cadmium tolerance in tomato and chilling tolerance in maize (Chen and Goldsbrough 1994; Kocsy et al. 1996). Transgenic poplars overexpressing g-ECS has the higher, than wild-type, possibility to accumulate Cd and parallel presented the increase tolerance to chloracetanilide herbicides (Gullner et al. 2001; Koprivova et al. 2002). The enhanced synthesis of GSH together with phytochelatins in various plant species exposed to cadmium stress was also described (Mendoza-Cózatl et al.
This modification apparently occurs mainly under oxidative/nitrosative stress conditions but may also be important under normal conditions, especially for regeneration of several thiol peroxidases (Rouhier et al. 2008). Glutathione together with H2O2 and/or O2⋅− can act both as messenger molecules in cellular signal transduction pathways in several organelles and as factors in plant defense responses (del Río et al. 1996; Karpinski et al. 1997). 6 Influence of Ascorbate and Glutathione on Gene Expression Associated with Biotic and Abiotic Stress Response Apart from the well documented role of antioxidative enzymes and antioxidants in removing H2O2 and other ROS, there is also a strong interaction between oxidants and antioxidants, at the level of gene expression and translation (May et al.
Acknowledgement This work was supported by the Polish Ministry of Science and Higher Education (project No. 50/N-DFG/2007/0).