Investigation of Non-Host Resistance in Arabidopsis thalina (Mouse-Ear Cress) Plants To Control Early Blight Pathogen Alternaria solani

This study was conducted to reveal non-host interactions between model plant Arabidopsis thaliana and early blight pathogen Alternaria solani in time-course experiments. Therefore, original Ler and Col-0 ecotypes that contain PAD4, NPR1, and EDS1 resistance genes and their mutants, Pad4-2 and Npr1-1 plants were inoculated with mycelial discs and conidial suspension. The inoculated Pad4-2 and Npr1-1 mutants have shown necrotic symptoms 5 to 10 times higher than original Ler and Col-0 ecotypes. Conidiospor inoculated Eds1-3, Pad4-2 and Npr1-1 mutant plants supported spor germinations, however, neither spor germinations nor spor pentrations were occurred on original Ler and Col-0 ecotype leaves. These results indicate that wild-type A. thaliana ecotypes carrying PAD4, EDS1 and NPR1 resistance genes govern resistance in non-host manner, the resistance mechanisms are always active to all organisms in the original A. thaliana ecotypes.