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Scanning electron microscopy images showing subcuticular hyphal growth and cuticle breach of Epichloë festucae noxA, noxB, noxAB, and noxR mutants on Lolium perenne leaf blades. Black arrowheads point to subcuticular hyphae, black asterisks indicate points of hyphal emergence of subcuticular hypha, and white asterisks indicate points of direct hyphal emergence. Bars, 5 μm.
