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(A) Leaves from 27-d-old JY417. (B) Leaves from 27-d-old XY335. Con1, A1, A2, and A3 indicate 0, 1 × 103, 1 × 106, and 1 × 109 spores/L of the fungal suspension, respectively, infiltrated with NBT. The staining was performed on the 3rd leaf of the maize seedlings; the leaves were cut into two segments because of the difficulty in staining longer leaves.
