FIG 1.

TEM observation of the endobacteria within the rapid-freezing and freeze-substituted hyphae. (A) Endobacterial cells aggregated in close proximity to a region filled with many lipid bodies. (B) Endobacterial cells aggregated in a region containing few lipid bodies. (C, D, and E) Endobacterial cells directly in contact with vacuoles, lipid bodies, and mitochondria, respectively. Red, yellow, blue, and black arrowheads indicate endofungal bacteria, vacuoles, lipid bodies, and mitochondria, respectively, inside the hyphal cells of Mortierella parvispora strain E1425.