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Overcoming hybrid sterility by treating sterile or partially sterile hybrid lilies with N2O for 48 h. Appearance of control pollen (left side) and N2O-induced pollen (right side) in ‘Yelloween’ (A, B), ‘Serrada’ (C, D), ‘Royal Trinity’ (E, F) and ‘Otome no Sugata’ (G, H) is shown. Bars = 100 μm.
