Figure 1.

Morphological aspects of tomato roots (Santa Clara I-5300 variety) inoculated with the fungi A101, A104, and A105 at 50 DAT. Melanized septate hyphae surround (arrowheads) or not (arrow) cells in the epidermis (B, J, M, and A, E, F, N, respectively) and in the cortex (K, C, and, H, L, respectively) and in the region between the cortex and vascular bundle (D). Microsclerotia-like structures (arrow with circle at the base) formed by the fungi in the epidermis (A, E–G,I,J,M, and N), in the cortex (C, H, K, L), and in the region between cortex and vascular bundle (D). Hyaline vesicles (arrow with diamond base) formed in the epidermis (M) and the cortex (K). Samples were stained with 0.01% methyl blue, except (H), which was obtained from an unstained cross section. Bar = 20 μm.