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Increase in the atmospheric mean temperature is mainly due to emission of green house gases (carbon dioxide (CO2), methane (CH4), ozone (O3), nitrous oxide, chlorofluoro carbons (CFCs)) by anthropogenic (Eitzinger et al., 2010) and agricultural systems (Smith and Olesen 2010). Black gram [Vigna mungo (L.) Hepper] is a tropical leguminous plant, popularly known as Urd bean or Mash in India. Black gram is very nutritious as it contains high levels of protein. Plants improve protective mechanism of heat stress responses encompassing different pathways that provide tolerance during HT stress. Plants adapt tolerance to high temperature stress by inherent basal level as well as acquired (Hikosaka et al., 2006). Tolerance limits vary between genotypes, but are also subject to acclimation (Weis et al., 1988). TIR (Temperature Induction Response) is a potential and versatile one for identifying highly thermo-tolerant genotype from a large population (Srikantbabu et al., 2002). SODs play a significant role in protecting lysing cells against the toxicity and mutagenicity of active 02 species by virtue of their capacity to scavenge the 02.- (Sandalios, 2001). Enzymatic test was made to resistant (LBG-806) and susceptible variety (LBG-823) of control, lethal (non-induced) and induced treatments of at 0th, 1st, 2nd and 3rd day seedlings. There was no significant difference was found between control and non-induced treatments in any day. In contrast rise in content in induction treatment over control was significantly different at (P<=0.01) in all days.