Molecular Mechanisms of Superoxide Dismutase (SODs)-Mediated Defense in Controlling Oxidative Stress in Plants

Batool R.; Umer M.J.; Hussain B.; Anees M.; Wang Z. · Antioxidant Defense in Plants: Molecular Basis of Regulation (2022) · DOI: 10.1007/978-981-16-7981-0_8

Resumen

Superoxide dismutases (SODs) are pervasive metalloenzymes that comprise the very first line of defense versus reactive oxygen species (ROS). It constitutes one of the most important enzymatic parts of detoxification of superoxide radicals that are produced in biological systems through catalyzing its dismutation to H2O2 and eventually to H2O as well as O2 depending on the catalase and peroxidase. In general, plant species includes several SOD isoforms varying in their active site metal ions, specifically Cu/Zn-SOD, Mn-SOD, and Fe-SOD. Numerous studies also stated that the tolerance levels of plants are positively associated with SOD activity at the same time as well as along with the number of SOD isoforms and founded the fact that “the greater the SOD activity, the greater the stress tolerance.” Hence, the SOD isozyme profile of any plant could be used as a balanced marker used for stress tolerance in plants. Throughout this chapter, we have talked about the title role of SOD in abiotic and biotic stress tolerance, kinds of SODs, and the correlation of its activity and its isoforms along with stress tolerance level. © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2022.

Instituciones: Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas