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Polyphenol oxidase activity (tyrosinase equivalent (TE)/0.1 g fresh root) from 2–8 weeks in the roots of Pratylenchus thornei inoculated (solid line) and non-inoculated (dotted line) resistant wheat genotypes—CPI133872 (blue), GS50a (green), and QT8343 (red)—and susceptible wheat genotypes—Janz (black) and Gatcher (orange). The values are the means of three replicates. The bar marker indicates LSD = 33 (p = 0.05) for the interaction genotype* P. thornei * time.
