Plants are unable to remove and predict different environmental stresses so they acquire number of mechanism to adjust these changes. Plants receive stimulations from external environment and pass these to the defense response genes, which show their responses, there are number of environmental stresses, which categorized into biotic and abiotic stresses. There are number of transcriptional factors, which control these stresses. Draught, salinity, water and UV radiations are some major stresses, which are reducing the productivity of plants in the world. The most important transcriptional factors are WRKY transcription factor in plants. These factors control number of development events and stresses responses in plants. These WRKY proteins consist of highly specific domain and they interact with other proteins due to these domains. WRKY domain act very important role against the environmental stresses and in the development of plants. WRKY protein has quick, short-lived and related to particular tissue expression under different environmental stresses. WRKY transcriptional factors carry out different function in plants like growth, development metabolism and transduction. WRKY are largest transcription factors which are highly plant-specific transcription factor and they are named due to highly preserved amino acid WRKYGQK in the N-terminus. The number of sequenced genome has been increased at very large amount which assist the evolution of WRKY protein family. Many species of plants have different numbers of WRKY genes which baised on their zinc finger motif. There are 97 WRKYs in Oryza nivara, 102 WRKYs in Oryza sativa, 171 WRKYs in Triticum aestivum, 116 WRKYs inZea mays species etc. Mosses contains 30-40 WRKY genes which were previously consisder as not plants species. Comparative genomic studies with bio-computational techniques show that these genes are present mostly in plant species. The evaluation and due to verities of plants species show that these transcription factors related to specific regulator families. Due to presence of SNPs in DNA sequence of different plants they show different mechanism for different transcriptional factors. In our present study we particularly focused on abiotic stresses and identified the SNPs which are present in plants due to which their stress mechanism changes. Our study reveals that SNPs are very important tools to show genetic relationship between different plants species.