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Structures of Fusarium graminearum hypha shown by scanning electron microscopy (A,B) and transmission electron microscopy (C,D). Control hyphal cell walls are smooth (A) and intact and contain electron-dense cell contents and relatively electron-lucent lipid granules (C). Hypha confronting Paenibacillus peoriae strain RP51 are shrunk and distorted (B); incompletely developed cell walls are broken and in association with cellular vacuolization (D).
