Journal of Industrial Microbiology

, Volume 15, Issue 2, pp 112–115 | Cite as

Colony switching in an alpha-amylase-producing strain ofBacillus subtilis

  • H Rodríguez


Four colony variants (two stable and two unstable phenotypes) were observed inBacillus subtilis α-10, an α-amylase-hyperproducing strain. The stable variants lost the ability to produce α-amylase, while the unstable ones reverted to the typical morphology after restreaking. Unstable expanding sectors appeared in typical colonies, and their appearance was influenced by the culture origin and age.


colony switching Bacillus subtilis morphological variants alpha-amylase transposable elements 


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Copyright information

© Society for Industrial Microbiology 1995

Authors and Affiliations

  • H Rodríguez
    • 1
  1. 1.Department of MicrobiologyCuban Research Institute on Sugarcane By-products (ICIDCA)C HabanaCuba

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