Resistance to tobacco osmotin conferred by genes ORE1, ORE2, and ORE3. Cells of BWG7a transformed with the empty vector YEp24 (1), and transformants of BWG7a (2–7) expressing ORE1 (2 and 3), ORE2 (4 and 5), and ORE3 (6 and 7), and GRF167 (8) were streaked on YPD medium containing 50 μg/ml of tobacco osmotin. Only control BWG7a cells failed to grow.