Figure 10.

Ultrastructure of subcuticular hyphae, cuticle breaching, epiphyllous and endophytic hyphae of Epichloë festucae wild‐type (WT) and ∆noxA mutant in Lolium perenne. (a, b) Subcuticular growth of ∆noxA hyphae (black arrowhead) and epiphyllous hyphae (white arrowheads). (c) Cuticle breach of subcuticular hypha (white asterisk). (d, e) Ultrastructure of the cell wall of epiphyllous hyphae of WT and ∆noxA mutant. (f, g) Endophytic hyphae of WT and ∆noxA mutant. Transmission electron micrographs of WT and ∆noxA infected leaf blade cross‐sections near the ligule. Bars: (a–c, f, g) 2 μm; (d, e) 0.5 μm.