Szarka, J.Csilléry, G.2021-06-282021-06-282001-09-11International Journal of Horticultural Science, Vol. 7 No. 3-4 (2001) , 69-71.1585-0404https://hdl.handle.net/2437/314122In addition to successes achieved in certain varieties in resistance breeding based on a defense reaction of host plants involving hypersensitive tissue destruction, resistant varieties putting a very strong selection pressure on pathogens have selected more and more aggressive types of pathogens. The never-ending race between plant and pathogen resulting from this can only be controlled by a defense system characterised by a different strategy. In each of the plant species that we bred a defence system was found, which contrary to hypersensitive reaction strives to keep the tissues at all costs and is not pathogen specific. This is implied in the term general defense system.  application/pdfCapsicum annuumCucumis sativusPhaseolus vulgarisNicotiana tabacumPseudomonas sp.Xanthomonas sp.Pseudoperonospora cubensisresistancehypersensitive reactiongeneral defense systemfolyóiratcikkOpen AccessInternational Journal of Horticultural Sciencehttps://doi.org/10.31421/IJHS/7/3-4/286International Journal of Horticultural Science3-47Int. j. hortic. sci.2676-931X