Fig. 4. (A) Reaction phenotypes in a pod of cv. Tendergreen 2 days after inoculation with (from left to right) race 7, RW60, RW60 (pAV520) containing the PAI and RW60(pPPY511) expressing avrPphF alone. (B) Reaction phenotypes in a pod of cv. Canadian Wonder 2 days after inoculation with (from left to right) race 7, RW60, RW60(pPPY511) expressing avrPphF, and RW60(pPPY511, pDAHR15) expressing both avrPphF and avrPphC. Note that the lesions caused by RW60 and RW60(pPPY511, pDAHR15) are sunken at this stage compared with the water-soaked susceptible response to race 7, whereas RW60(pPPY511) has already caused a brown lesion characteristic of the rapid HR induced. (C) Reactions at infiltration sites in soybean leaves (cv. Osumi) 3 days after inoculation with (left to right) RW60, which causes a null reaction, and the transconjugant RW60(pPPY511) expressing avrPphF, which causes a susceptible response recognized by yellowing as shown and later some water- soaking.