estudos sobre a esporulação de uma amostra de bacillus: iv - outras evidências sobre a atividade do íon mn[2+] na esporulação endotrófica studies on the sporulation of a bacillus strain: iv - further evidences of the mn[2+] ion activity in the endotrophic sporulation
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ID: 225955
1973
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Abstract
Foram feitas experimentações om o intuito de se buscar mais evidências sobre a participação do íon Mn[2+] no mecanismo esporogenético de uma amostra de Bacillus licheniformis. Quando as formas vegetativas desta bactéria eram depositadas em um meio mineral, carente de fonte de carbono utilizável, em conjunto com um agente seqüestrante de metais como EDTA, a esporulação endotrófica deixava de ocorrer. Entretanto, a esporulação pôde ser protegida quando as células eram previamente saturadas com um excesso de Mn[2+] exógeno. As formas esporuladas obtidas nas condições estudadas mostraram termorresistência a 85ºC durante 20 minutos.
In the present paper the authors bring out more evidences concerning the influence of Mn[2+] ion on the endotrophic sporulation of Bacillus licheniformis-2390. Vegetative cells of this bacteria could not sporulate if they were submited to a sufficient concentration of EDTA. Otherwise, this sporulatio ocurred when the vegetative forms were first protected by an excess of exogenous Mn[2+] of Zn[2+], Fe[2+] and Mg[2+]. Those spores obtained shown thermoresistence to 85ºC during 20 minutes.
In the present paper the authors bring out more evidences concerning the influence of Mn[2+] ion on the endotrophic sporulation of Bacillus licheniformis-2390. Vegetative cells of this bacteria could not sporulate if they were submited to a sufficient concentration of EDTA. Otherwise, this sporulatio ocurred when the vegetative forms were first protected by an excess of exogenous Mn[2+] of Zn[2+], Fe[2+] and Mg[2+]. Those spores obtained shown thermoresistence to 85ºC during 20 minutes.
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| Authors | ;Leon Rabinovitch;Sônia Maria da Silva |
| Journal | kurdistan journal of applied research |
| Year | 1973 |
| DOI |
10.1590/S0074-02761973000100009
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