The invention relates to a method of increasing the resistance to one or more penetrating pathogen(s) in a monocotyledonous or dicotyledonous plant or a part of a plant, for example in an organ, tissue, a cell or a part of a plant cell, for example in an organell, wherein a DNA sequence which codes for an armadillo repeat ARM1 protein and which mediates an increased pathogen resistance, preferably an increased resistance to fungal pathogens, is increased into, and expressed in, the plant or plant cell; or wherein an endogenous DNA sequence which codes for an armadillo repeat ARM1 protein and which mediates an increased pathogen resistance, preferably an increased resistance to fungal pathogens, is increased in the plant or plant cell in comparison with the original, or wild-type, plant, or wherein the endogenous gene sequence or preferably the 5'-untranslated region (5'UTR) is modified in comparison with the original sequence. The invention also relates to plants, to parts of a plant, for example an organ, tissue, a cell or a part of a plant cell, for example an organelle, which are obtained by the above methods, and to corresponding propagation material.