title: [Adaptation of Mycoplasma gallisepticum to unfavorable growth conditions: changes in morphological and physiological characteristics].
abstract: Adaptation of Mycoplasma gallisepticum to unfavorable growth conditions results in altered morphological and physiological characteristics of the cells. M. gallisepticum populations in a complete nutrient medium contain pear-shaped vegetative cells (d approximately 0.3 microm; l approximately 0.8 microm) with pronounced polar and cytoskeleton-like structures. Such mycoplasma cells are able to induce damage in a bacterial genome, causing an SOS response of the test strain (Escherichia coli PQ37). In a starvation medium, M. gallisepticum produces nanoforms, small coccoid cells (d approximately 0.15-0.2 microm) without either polar or cytoskeleton-like structures. Unlike vegetative cells, nanoforms do not induce genome damage. Alleviation of unfavorable growth conditions results in a reversion of nanoforms to typical vegetative cells.
authors.forename: V M
authors.initials: VM
authors.lastname: Chernov
authors.forename: O A
authors.initials: OA
authors.lastname: Chernova
authors.forename: O V
authors.initials: OV
authors.lastname: Gorshkov
authors.forename: A A
authors.initials: AA
authors.lastname: Muzykantov
authors.forename: G F
authors.initials: GF
authors.lastname: Shaĭmardarova
authors.forename: A D
authors.initials: AD
authors.lastname: Pel'nikevich
authors.forename: A B
authors.initials: AB
authors.lastname: Margulis
authors.forename: A I
authors.initials: AI
authors.lastname: Kolpakov
authors.forename: O N
authors.initials: ON
authors.lastname: Il'inskaia
mesh_terms: D000222:Adaptation, Physiological; D001688:Biological Products / Q000378:metabolism / Q000494:pharmacology; D003470:Culture Media; D017077:Culture Media, Conditioned / Q000378:metabolism / Q000494:pharmacology; D004249:DNA Damage; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics / Q000502:physiology; D045686:Mycoplasma gallisepticum / Q000235:genetics / Q000254:growth & development* / Q000648:ultrastructure*; D013014:SOS Response, Genetics
chemical_list: D001688:Biological Products; D003470:Culture Media; D017077:Culture Media, Conditioned