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. 2009 Nov 18;11(2):283–291. doi: 10.1111/j.1364-3703.2009.00599.x

Figure 3.

Figure 3

The white rust resistance gene WRR4 from Arabidopsis thaliana confers full resistance in a susceptible cultivar of Brassica napus (ACS‐N32). (A) Upper and lower surfaces of a wild‐type cotyledon 10 days after inoculation with the virulent isolate Ac7a, exhibiting full susceptibility with the profuse development of white pustules on the lower surface and no host cell necrosis visible microscopically (far right). (B) Upper and lower surfaces of an ACS‐N32 cotyledon stably transformed with WRR4, indicating full resistance with no formation of pustules on the upper or lower surfaces of the cotyledon, and minute patches of necrotic cells visible microscopically at the site of infection (far right).