Plants are exposed to abiotic stresses such as drought, high or low temperature, and to biotic stresses such as insect attack or pathogen infection. Plants have developed specific mechanisms to detect external signals with proper phosiological responses in order to survive under these challenges. Protein Phosphorylation is involved in plant response to pathogen attacks. One of the principle phosphorylation pathways that are used by plants in biotic and abiotic stress responses is mitogen activated protein kinase (MAPK) pathway, which consists of MAPKKK, MAPKK, and MAPK. The
following work will be presented: cell death mechanisms, DNA repairing genes, β-glucanase and glutamine synthetase, and FLR gene expression have been studied when resistant and susceptible wheat cultivars were challenged by fungal toxin Fumonisin B1 and defense signaling molecule salicylic acid (SA).