Myceloid growth of Arthrobacter globiformis and other Arthrobacter species

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Abstract
Transitory myceloid growth occurs in certain complex media with Arthrobacter globiformis strain ATCC 8010. This type of growth, however, was not observed in a medium which contained an array of metal ions but did not contain agents able to complex metal ions. Addition of metal-complexing agents to this medium caused an interruption in the life cycle of strain 8010 so that growth occurred only as the myceloid form. It appeared that manganese was the critical metal that was removed by the metal-complexing agents. During growth, the myceloid cells started to fragment, but wall septation was incomplete. A. globiformis strain ATCC 4336 and several other Arthrobacter species and soil isolates, but not Arthrobacter crystallopoietes, responded to metal-complexing agents as did strain 8010. Biotin and vitamin B12 were not involved in this myceloid growth.

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