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Toluidine blue staining of transversal sections of cauliflower hypocotyls. Stomatal penetration at 6 dpi by binucleate Rhizoctonia AG K and toluidine blue positive granulation of some adjacent cells (left). Penetration underneath an infection cushion at 3 dpi by R. solani AG 2-1 (right). Scale bars = 50 μm.
