[Problem] To provide a pathogen-resistant plant body that is disease resistant, even with little to no use of chemical agents, without the risk of detrimentally affecting the growth, morphogenesis, or photosynthetic activity thereof, in an environment where natural infection of phytopathogenic bacteria can occur. [Solution] A pathogen-resistant plant body (1) induced by being irradiated with violet light, the leaves of the plant body are irradiated with violet light (11) having a peak wavelength in the range of 390-420nm, and said pathogen-resistant plant body is characterized in that: more genes associated with a pathogen-protective response are expressed in comparison to a plant body of the same species not subjected to the violet light irradiation and the genes associated with a pathogen-protective response are genes associated with pathways of salicylic acid synthesis or gene groups induced by salicylic acid.
