Figure 4
From: Multiple bacterial partners in symbiosis with the nudibranch mollusk Rostanga alisae
Endosymbiotic bacteria housed in bacteriocytes of Rostanga alisae. (A) Cells of integument epithelium of the foot containing bacteriocytes with several bacterial morphotypes of bacteria. Phagosome (ph) is visible. (B) Bacteriocyte containing curved-rod bacteria with lophotrichous flagella (fl). Vacuoles with electron-transparent contents are visible in the cytoplasm of bacteria. (C) Bacteriocytes containing rod-shaped bacteria with flagella (black asterisk) and without flagella (white asterisk). (D) Dividing flagellate bacterium in the bacteriocyte (arrow). (E) Bacteriocyte containing large rod-shaped bacteria, which forming a chain as a result of incomplete division. Arrows show the contacts of bacteria. Nucleus (nu) of the epithelial cell is visible. (F) Higher magnification of bacteria of this morphotypes indicated in (E). A tortuous outer membrane, extensive nucleoid zone, and vacuoles are visible. Arrows show the contact points of the outer membranes of adjacent individuals.
