mppol/1996/1209ball Figure 1

Figure 3. Symptoms produced in two hexaploid wheat cultivars by purified Ptr necrosis toxin, E. coli-pPtrNEC lysate and E. coli-pSK lysate. 1-2, cultivar Erik (toxin insensitive) infiltrated with Ptr necrosis toxin (1) and with E. coli-pPtrNEC-produced toxin (2); 3-5, cultivar Glenlea (toxin sensitive) infiltrated with Ptr necrosis toxin (3), E. coli-pPtrNEC lysate (4) and E. coli-pSK lysate (5).