[Architectonics of Bifidobacteria populations: submicroscopic aspect of cell cohesion in Bifidobacterium adolescentis and Bifidobacterium bifidum].
Populations (cultures) of Bifidobacterium adolescents and B. bifidum, growing on artificial liquid and agar media, are presented by highly ordered mycelial structures. The topography of them depends on mutual arrangement of polymorphic cells and the way of their daughter cells separation after division. Evidences obtained by scanning electron microscopy (SEM) of total preparations and by transmission electron microscopy (TEM) of ultrathin sections correlate well. These data showed the existence of morphologically varied intercellular contacts (coherence) that ensure the stability of such microbial consortia during adaptation to ambient conditions. Intercellular contacts with the aid of different extracellular structures--microfibrillae, knob-like juts, cell wall evaginations, and capsuleform stuff(glycocalix)--are the result of genetically determined self-regulating development of microbial populations as multicellular systems.
Novik
G I
GI
Vysotskiĭ
V V
VV
D000222:Adaptation, Physiological; D001422:Bacterial Adhesion / Q000502:physiology*; D001644:Bifidobacterium / Q000235:genetics / Q000502:physiology / Q000648:ultrastructure*; D002455:Cell Division / Q000502:physiology; D003470:Culture Media; D008855:Microscopy, Electron, Scanning; D008867:Microtomy; D011110:Polymorphism, Genetic
D003470:Culture Media