Fig 4. Spontaneous suppressors of the Fgprp4 mutant.

(A). PDA cultures of the Fgprp4 mutant (FP1) strains after incubation for two weeks. Fast growing sectors were marked with arrows. (B). CM cultures of representative type I and type II suppressor mutants grew in race tubes for 14 days. (C). Flowering wheat heads were drop inoculated with conidia of the wild type PH-1 and marked Fgprp4 suppressor strains. Typical wheat heads were examined 14 dpi. (D). Perithecia and asci produced by suppressor strains S3, S18, S38, and S30. Lower panels show asci and ascospores released from cracked perithecia. Bar = 50 μm.