Figure 8.

Wheat leaves infected with 4 × 10⁶ spores/ml Zymoseptoria tritici Δku70 strain and the ΔztstuA mutant at 28 days post-infection (d.p.i.). Images representative of three independent ΔztstuA strains tested. Scale bar = 500 μm.; (A) the Δku70 strain produces necrotic lesions and pycnidia on the wheat leaf. The pycnidia ooze cloudy cirrhus which contains pycnidiospores (indicated by arrows); (B) leaves infected with the ΔztstuA mutant show signs of chlorosis but no pycnidia. Instead, the ΔztstuA mutant grows as white hyphae which traverse the leaf surface.