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. 2008 May 29;9(5):563–575. doi: 10.1111/j.1364-3703.2008.00487.x

Figure 2.

Figure 2

Infection structures of Puccinia triticina on wheat leaf surface. (A) Urediniospore (U) germ tube (G) has produced an appressorium (A) over stomatal aperture (bar = 40 µm). (B) Appressorium contents have moved into substomatal vesicle (SSV) (bar = 12 µm). (C) Inside of leaf showing SSV orientated perpendicular to leaf surface (bar = 10 µm). (D) SSV produces primary infection hyphae (PH) and haustorial mother cell (HMC). The HMC produces a haustorium (not shown) within a mesophyll cell. A secondary haustoria (SH) may emerge in the proximity of HMC (bar = 7 µm). Pictures courtesy of Hu and Rijkenberg (1998), by permission of Elsevier.