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Volume 7, Pages 1-6
Research Article

Acholeplasma laidlawii PG8 Culture Adapted to Unfavorable Growth Conditions Shows an Expressed Phytopathogenicity

Kazan Institute of Biochemistry and Biophysics, Russian Academy of Sciences, Kazan, Russia

Received 23 August 2006; Revised 19 December 2006; Accepted 20 December 2006

Academic Editor: Hans-Peter Schmauder

Copyright © 2007 Vladislav M. Chernov et al.


Mycoplasmas are the smallest, self-replicating, prokaryotic organisms with avid biochemical potential and spreading in higher eukaryotes in nature. In this study, Acholeplasma laidlawii PG8 cells were cultivated on a deficient medium for 480 days resulting in a mycoplasma culture that was adapted in vitro to unfavorable growth conditions. Cells that survive this condition had decreased sizes (about 0.2 μm) and increased phytopathogenicity. This resulted in more frequent appearance of various morphological alterations when plants of vinca (Vinca minor L.) were infected by adapted mycoplasma cells. The increasing pathogenicity was accompanied by changes in genome expression in these adapted cells. Further studies are needed to explore the exact mechanisms that permit adaptation to unfavorable growth conditions and changes in phytopathogenic potential.