Fig. 5
From: Cellular and molecular characterization of a stem rust resistance locus on wheat chromosome 7AL
Trypan blue staining of responses to rust infection in resistant and susceptible genotypes. Time points are indicated by the corresponding numbers (DPI), and S and R represent the susceptible and resistant typical responses, respectively. Arrows indicate various rust and plant structures: urediniospore (s), elongation tube (e), appressorium (a), uredinia (u), stoma (st) and epidermal cell (ec)