Figure 10.  Cross-section of a perithecium of Gibberella zeae showing the ostiole (top arrow) and asci bearing ascospores (bottom arrow). (Reprinted with permission from F. Trail and R. Common. Perithecial development by Gibberella zeae: a light microscopy study. Mycologia 92:130-138. 2000. © Mycological Society of America.)

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