Ultrastructural features of the Δ<i>sidN</i> mutant - plant infection phenotype.

<p><b>A.</b> Aberrant Δ<i>sidN 85</i> mutant hyphae in the mesophyll of the inner leaf sheath surrounding host cells. B. An epiphyllous Δ<i>sidN 85</i> mutant hypha on the outside of the outer leaf blade. C. Δ<i>sidN 85</i> mutant hyphae in the main vascular bundle of the inner leaf sheath. Bar indicates 1000 nm. fc indicates fungal cell, pc for plant cell, pcw for plant cell wall.