MicroBiology Home   Microbiology, 4/e               Prescott, Harley, Klein

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Here's what the terms mean:

axial filament  The organ of motility in spirochetes. It is made of axial fibrils or periplasmic flagella that extend from each end of the protoplasmic cylinder and overlap in the middle of the cell. The outer sheath lies outside the axial filament (p.63, 450)
baeocytes   Small, spherical, reproductive cells produced by pleurocapsalean cyanobacteria through multiple fission (p. 448)
chlamydiae   Members of the genus Chlamydia: gram-negative, coccoid cells that reproduce only within the cytoplasmic vesicles of host cells using a life cycle that alternates between elementary bodies and reticulate bodies (p. 449)
cyanobacteria   A large group of bacteria that carry out oxygenic photosynthesis using a system like that present in photosynthetic eucaryotes (p. 443)
elementary body (EB)   A small, dormant body that serves as the agent of transmission between host cells in the chlamydial life cycle (p. 449)
gliding motility   A type of motility in which a microbial cell glides along when in contact with a solid surface (p. 63, 454)
heterocysts   Specialized cells produced by cyanobacteria that are the sites of nitrogen fixation (p. 445)
hormogonia  Small motile fragments produced by fragmentation of filamentous cyanobacteria; used for asexual reproduction and dispersal (p. 445)
initial body   See reticulate body (RB).
oxygenic photosynthesis   Photosynthesis that oxidizes water to form oxygen; the form of photosynthesis characteristic of eucaryotic algae and cyanobacteria (p. 185, 440)
periplasmic flagella   The flagella that lie under the outer sheath and extend from both ends of the spirochete cell to overlap in the middle and form the axial filament. Also called axial fibrils and endoflagella (p. 450)
reticulate body (RB)   The form in the chlamydial life cycle whose role is growth and reproduction within the host cell (p. 449)
trichome   A row or filament of bacterial cells that are in close contact with one another over a large area (p. 445)

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