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Flow cytometric histograms of relative fluorescence intensities of propidium iodide‐stained nuclei isolated from healthy Bidens pilosa leaves and the plant DNA reference standard Solanum lycopersicum (a), Uromyces bidentis‐infected B. pilosa leaves (b), and U. bidentis‐infected B. pilosa leaves and the plant DNA reference standard S. lycopersicum (c).
