Effects of culture conditions on the production of inulinase by Kluyveromyces marxianus

The present study was conducted to investigate the influence of initial sucrose concentration, pH and aeration rate on biomass and inulinase production by Kluyveromyces marxianus var. bulgaricus in a stirred batch reactor. Maximum inulinase activity (15.29 UmL-1) was obtained at a sucrose concentrat...

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Main Authors: Marcia Luciana Cazetta, Rubens Monti, Jonas Contiero
Format: Article
Language:English
Published: Instituto de Tecnologia do Paraná (Tecpar) 2010-06-01
Series:Brazilian Archives of Biology and Technology
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300027
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spelling doaj-ba6ce3ea40b347e49656afd06b1c35902020-11-25T02:09:16ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242010-06-0153370170710.1590/S1516-89132010000300027Effects of culture conditions on the production of inulinase by Kluyveromyces marxianusMarcia Luciana CazettaRubens MontiJonas ContieroThe present study was conducted to investigate the influence of initial sucrose concentration, pH and aeration rate on biomass and inulinase production by Kluyveromyces marxianus var. bulgaricus in a stirred batch reactor. Maximum inulinase activity (15.29 UmL-1) was obtained at a sucrose concentration of 10 g L-1, pH 5.0 and aeration rate of 1 vvm. The 20 g L-1 sucrose concentration was suitable for cell growth; however, enzymatic activity at this concentration was inhibited due to catabolic repression. The increase in aeration rate caused a reduction in enzyme activity with no relevant biomass increase.<br>O estudo foi conduzido para investigar a influência da concentração inicial da sacarose, a taxa da aeração e do pH na biomassa e na produção da inulinase pela Kluyveromyces marxianus var. bulgaricus em um reator em batelada. A máxima atividade de inulinase, 15.29 UmL-1, foi obtida na concentração de 10 g L-1 de sacarose, no pH 5.0 e na taxa da aeração de 1 vvm. A concentração de sacarose de 20g L-1 foi apropriada para o crescimento celular, porém nesta concentração a atividade enzimática foi inibida, devido a repressão catabólica. O aumento na taxa da aeração propiciou redução da atividade enzimática, ao mesmo tempo em que não houve aumento considerável do biomassa.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300027Kluyveromyces marxianus var. bulgaricussucroseinulinasebiomassbatch fermentation
collection DOAJ
language English
format Article
sources DOAJ
author Marcia Luciana Cazetta
Rubens Monti
Jonas Contiero
spellingShingle Marcia Luciana Cazetta
Rubens Monti
Jonas Contiero
Effects of culture conditions on the production of inulinase by Kluyveromyces marxianus
Brazilian Archives of Biology and Technology
Kluyveromyces marxianus var. bulgaricus
sucrose
inulinase
biomass
batch fermentation
author_facet Marcia Luciana Cazetta
Rubens Monti
Jonas Contiero
author_sort Marcia Luciana Cazetta
title Effects of culture conditions on the production of inulinase by Kluyveromyces marxianus
title_short Effects of culture conditions on the production of inulinase by Kluyveromyces marxianus
title_full Effects of culture conditions on the production of inulinase by Kluyveromyces marxianus
title_fullStr Effects of culture conditions on the production of inulinase by Kluyveromyces marxianus
title_full_unstemmed Effects of culture conditions on the production of inulinase by Kluyveromyces marxianus
title_sort effects of culture conditions on the production of inulinase by kluyveromyces marxianus
publisher Instituto de Tecnologia do Paraná (Tecpar)
series Brazilian Archives of Biology and Technology
issn 1516-8913
1678-4324
publishDate 2010-06-01
description The present study was conducted to investigate the influence of initial sucrose concentration, pH and aeration rate on biomass and inulinase production by Kluyveromyces marxianus var. bulgaricus in a stirred batch reactor. Maximum inulinase activity (15.29 UmL-1) was obtained at a sucrose concentration of 10 g L-1, pH 5.0 and aeration rate of 1 vvm. The 20 g L-1 sucrose concentration was suitable for cell growth; however, enzymatic activity at this concentration was inhibited due to catabolic repression. The increase in aeration rate caused a reduction in enzyme activity with no relevant biomass increase.<br>O estudo foi conduzido para investigar a influência da concentração inicial da sacarose, a taxa da aeração e do pH na biomassa e na produção da inulinase pela Kluyveromyces marxianus var. bulgaricus em um reator em batelada. A máxima atividade de inulinase, 15.29 UmL-1, foi obtida na concentração de 10 g L-1 de sacarose, no pH 5.0 e na taxa da aeração de 1 vvm. A concentração de sacarose de 20g L-1 foi apropriada para o crescimento celular, porém nesta concentração a atividade enzimática foi inibida, devido a repressão catabólica. O aumento na taxa da aeração propiciou redução da atividade enzimática, ao mesmo tempo em que não houve aumento considerável do biomassa.
topic Kluyveromyces marxianus var. bulgaricus
sucrose
inulinase
biomass
batch fermentation
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300027
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