Symbioses with intracellular carbon-fixing bacteria, believed to be dependent on bacteriocyte
hemoglobin, have heretofore been described only in clams of the families Solemyidae, Lucinidae, and Vesicomyidae and in a few mussels, Mytilidae, restricted to the genus Bathy-modiolus (4).
Ultrabithorax is essential for bacteriocyte
Nakabuchi discusses how mutualism can be revealed by a study of symbiont genomics and bacteriocyte
transcriptomics (Chapter 8).
aequizonata show a dense population of bacteria filling most of the bacteriocyte
The bacteria are intracellular and restricted to one cell type, generically known as the bacteriocyte
, which apparently functions exclusively to house and maintain the symbiosis.
Moreover, it is confined to a second type of bacteriocyte
that, notably, is as abundant as Buchnera-filled bacteriocytes
in the cedar aphid host (Gomez-Valero et at, 2004).
: host cell containing symbionts (Southward, 1982; Hand, 1987; deBurgh et al., 1989; Gardiner and Jones, 1993).
. Host cell containing symbionts (Southward, 1982).
The data presented here offer a first glimpse into the relationship between metabolite flux, chemoautotrophic activity, and host bacteriocyte
gene expression in a chemoautotrophic symbiosis.
Roots contain large blood vessels, bacteriocyte
layer, and epidermis.
The gill filaments in these species are expanded abfrontally and have a distinct bacteriocyte
are typically spherical or cylindrical.