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Peroxidase activity of pschit plants. Fully expanded leaves of 8-week-old tobacco plants were infiltrated with a suspension of P. syringae pv tabaci and collected 24 h after infection. The results shown are the mean of three independent experiments; and the activity measurements were made, respectively, on two, three, three, and four independent Bin19, pschit42, pschit33 × 42, and pschit33 lines.
