“…This rapid response of the plant involves the death or sacrifi ce of the fi rst host cell(s) invaded, and thus the term hypersensitive response or hypersensitive resistance. These hypersensitive cells are the cells that produce molecules which either kill or at least prevent the further growth of the pathogen (13,28,58,70,78,83,118,119,138). mating type will specifically agglutinate cells of the opposite mating type (128,141).…”