Figure 8.

The nudt7 mutant is hypersensitive to PQ. A, One day after spraying 4-week-old plants with 10 μm PQ, some leaves of nudt7 and nudt7 eds5 plants became wilted, whereas the wild-type plant (Col) showed a much milder symptom. B, Five days after the PQ treatment, some leaves of nudt7 and nudt7 npr1 plants showed the necrotic symptom. C, PQ application causes pronounced growth stunting to the nudt7 mutant. The plants were sprayed with 5 μm PQ every 4 d starting at the 3-week-old seedling stage. The photo was taken 4 d after the third application of PQ.