Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of Bahia
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.5897/AJB06.151 http://hdl.handle.net/11449/68912 |
Resumo: | The objective of this research was to investigate the potential of xylanase production by Aspergillus japonicus and to determine the effects of cultivation conditions in the process, aiming toward optimization of enzyme production. The best temperature, as well as the best carbon source, for biomass production was determined through an automated turbidimetric method (Bioscreen-C). The enzyme activity of this fungus was separately evaluated in two solid substrates (wheat and soybean bran) and in Vogel medium, adding other carbon sources. Temperature effects, cultivation time, and spore concentrations were also tested. The best temperature for enzyme and biomass production was 25°C; however, the best carbon source for growth (determined by the Bioscreen C) did not turn out to be a good inducer of xylanase production. Maximum xylanase activity was achieved when the fungus was cultivated in wheat bran (without the addition of any other carbon source) using a spore concentration of 1 × 107 spores/mL (25°C, pH 5.0, 120 h). A. japonicus is a good xylanase producer under the conditions presented in these assays. © 2006 Academic Journals. |
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Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of BahiaAspergillus japonicusEnzyme optimizationXylanase activitycarbonxylan endo 1,3 beta xylosidaseAspergillusaspergillus japonicusbiomass productionbiosynthesisbranBrazilcarbon sourceconcentration (parameters)enzyme activityenzyme synthesisfungus isolationnonhumansoybeanspecies cultivationtemperatureturbidimetrywheatFungiGlycine maxTriticum aestivumThe objective of this research was to investigate the potential of xylanase production by Aspergillus japonicus and to determine the effects of cultivation conditions in the process, aiming toward optimization of enzyme production. The best temperature, as well as the best carbon source, for biomass production was determined through an automated turbidimetric method (Bioscreen-C). The enzyme activity of this fungus was separately evaluated in two solid substrates (wheat and soybean bran) and in Vogel medium, adding other carbon sources. Temperature effects, cultivation time, and spore concentrations were also tested. The best temperature for enzyme and biomass production was 25°C; however, the best carbon source for growth (determined by the Bioscreen C) did not turn out to be a good inducer of xylanase production. Maximum xylanase activity was achieved when the fungus was cultivated in wheat bran (without the addition of any other carbon source) using a spore concentration of 1 × 107 spores/mL (25°C, pH 5.0, 120 h). A. japonicus is a good xylanase producer under the conditions presented in these assays. © 2006 Academic Journals.Centro de Estudos Ambientais Universidade Estadual Paulista, Avenida 24-A, Rio Claro, SP 13506-900Universidade Estadual do Sudoeste da Bahia, Km 4, Vitória da Conquista, Bahia, CEP 45050-020Centro de Estudos Ambientais Universidade Estadual Paulista, Avenida 24-A, Rio Claro, SP 13506-900Universidade Estadual Paulista (Unesp)Universidade Estadual do Sudoeste da Bahia (UESB)Simões, Maria Lúcia Garcia [UNESP]Tauk-Tornisielo, Samia Maria [UNESP]2014-05-27T11:21:53Z2014-05-27T11:21:53Z2006-06-02info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1135-1141application/pdfhttp://dx.doi.org/10.5897/AJB06.151African Journal of Biotechnology, v. 5, n. 11, p. 1135-1141, 2006.1684-5315http://hdl.handle.net/11449/6891210.5897/AJB06.151WOS:0002380904000222-s2.0-337450415602-s2.0-33745041560.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAfrican Journal of Biotechnologyinfo:eu-repo/semantics/openAccess2024-04-10T19:22:34Zoai:repositorio.unesp.br:11449/68912Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:47:59.192349Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of Bahia |
title |
Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of Bahia |
spellingShingle |
Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of Bahia Simões, Maria Lúcia Garcia [UNESP] Aspergillus japonicus Enzyme optimization Xylanase activity carbon xylan endo 1,3 beta xylosidase Aspergillus aspergillus japonicus biomass production biosynthesis bran Brazil carbon source concentration (parameters) enzyme activity enzyme synthesis fungus isolation nonhuman soybean species cultivation temperature turbidimetry wheat Fungi Glycine max Triticum aestivum |
title_short |
Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of Bahia |
title_full |
Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of Bahia |
title_fullStr |
Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of Bahia |
title_full_unstemmed |
Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of Bahia |
title_sort |
Optimization of xylanase biosynthesis by Aspergillus japonicus isolated from a Caatinga area in the Brazilian state of Bahia |
author |
Simões, Maria Lúcia Garcia [UNESP] |
author_facet |
Simões, Maria Lúcia Garcia [UNESP] Tauk-Tornisielo, Samia Maria [UNESP] |
author_role |
author |
author2 |
Tauk-Tornisielo, Samia Maria [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Estadual do Sudoeste da Bahia (UESB) |
dc.contributor.author.fl_str_mv |
Simões, Maria Lúcia Garcia [UNESP] Tauk-Tornisielo, Samia Maria [UNESP] |
dc.subject.por.fl_str_mv |
Aspergillus japonicus Enzyme optimization Xylanase activity carbon xylan endo 1,3 beta xylosidase Aspergillus aspergillus japonicus biomass production biosynthesis bran Brazil carbon source concentration (parameters) enzyme activity enzyme synthesis fungus isolation nonhuman soybean species cultivation temperature turbidimetry wheat Fungi Glycine max Triticum aestivum |
topic |
Aspergillus japonicus Enzyme optimization Xylanase activity carbon xylan endo 1,3 beta xylosidase Aspergillus aspergillus japonicus biomass production biosynthesis bran Brazil carbon source concentration (parameters) enzyme activity enzyme synthesis fungus isolation nonhuman soybean species cultivation temperature turbidimetry wheat Fungi Glycine max Triticum aestivum |
description |
The objective of this research was to investigate the potential of xylanase production by Aspergillus japonicus and to determine the effects of cultivation conditions in the process, aiming toward optimization of enzyme production. The best temperature, as well as the best carbon source, for biomass production was determined through an automated turbidimetric method (Bioscreen-C). The enzyme activity of this fungus was separately evaluated in two solid substrates (wheat and soybean bran) and in Vogel medium, adding other carbon sources. Temperature effects, cultivation time, and spore concentrations were also tested. The best temperature for enzyme and biomass production was 25°C; however, the best carbon source for growth (determined by the Bioscreen C) did not turn out to be a good inducer of xylanase production. Maximum xylanase activity was achieved when the fungus was cultivated in wheat bran (without the addition of any other carbon source) using a spore concentration of 1 × 107 spores/mL (25°C, pH 5.0, 120 h). A. japonicus is a good xylanase producer under the conditions presented in these assays. © 2006 Academic Journals. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-06-02 2014-05-27T11:21:53Z 2014-05-27T11:21:53Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.5897/AJB06.151 African Journal of Biotechnology, v. 5, n. 11, p. 1135-1141, 2006. 1684-5315 http://hdl.handle.net/11449/68912 10.5897/AJB06.151 WOS:000238090400022 2-s2.0-33745041560 2-s2.0-33745041560.pdf |
url |
http://dx.doi.org/10.5897/AJB06.151 http://hdl.handle.net/11449/68912 |
identifier_str_mv |
African Journal of Biotechnology, v. 5, n. 11, p. 1135-1141, 2006. 1684-5315 10.5897/AJB06.151 WOS:000238090400022 2-s2.0-33745041560 2-s2.0-33745041560.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
African Journal of Biotechnology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1135-1141 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129359981051904 |