Not AvailableSuperoxide dismutases (SODs) are ubiquitous metalloenzymes that constitute
the first line of defense against reactive oxygen species (ROS). It constitutes one of
the major enzymatic components of detoxification of superoxide radicals generated
in biological system by catalyzing its dismutation to H2O2 and finally to H2O
and O2 by catalase and peroxidase. Most plant species contain numerous SOD
isoforms differing in their active site metal ions, namely Cu/Zn-SOD, Mn-SOD,
and Fe-SOD. Many studies also reported that the tolerance level of plants is positively
correlated with SOD activity as well as with the number of SOD isoforms,
and established the fact that “More the SOD Activity, More the Stress Tolerance.”
Therefore, the SOD isozyme profile of any plant can be used as stable marker
for stress tolerance in plant. In this chapter, we have discussed the role of SOD in
abiotic stress tolerance, type of SODs, and correlation of its activity and its isoforms
with stress tolerance level.Not Availabl
