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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
17/10/2001 |
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Data da última atualização: |
06/04/2017 |
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Autoria: |
AB'SABER, A. N. |
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Título: |
Problematica da desertificacao e da savanizacao no Brasil intertropical. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Geomorfologia, v.53, p.1-19, 1977. |
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Idioma: |
Português |
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Palavras-Chave: |
Brasil; Desert. |
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Thesagro: |
Desertificação. |
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Thesaurus Nal: |
Brazil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00417naa a2200157 a 4500
001 1809215
005 2017-04-06
008 1977 bl --- 0-- u #d
100 1 $aAB'SABER, A. N.
245 $aProblematica da desertificacao e da savanizacao no Brasil intertropical.
260 $c1977
650 $aBrazil
650 $aDesertificação
653 $aBrasil
653 $aDesert
773 $tGeomorfologia$gv.53, p.1-19, 1977.
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Registro original: |
Embrapa Pantanal (CPAP) |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite; Embrapa Trigo. |
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Data corrente: |
03/01/2018 |
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Data da última atualização: |
09/08/2022 |
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Tipo da produção científica: |
Nota Técnica/Nota Científica |
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Circulação/Nível: |
A - 1 |
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Autoria: |
LIMA, J. O.; PEREIRA, J. F.; ARAÚJO, R. F. de; QUEIROZ, M. V. de. |
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Afiliação: |
JULIANA OLIVEIRA LIMA, UNIVERSIDADE FEDERAL DE VIÇOSA; JORGE FERNANDO PEREIRA, CNPGL; ELZA FERNANDES DE ARAÚJO, UNIVERSIDADE FEDERAL DE VIÇOSA; MARISA VIEIRA DE QUEIROZ, UNIVERSIDADE FEDERAL DE VIÇOSA. |
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Título: |
Pectin lyase overproduction by Penicillium griseoroseum mutants resistant to catabolite repression. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Brazilian Journal of Microbiology, São Paulo, v. 48, n. 3, p. 602-606, 2017. |
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DOI: |
https://doi.org/10.1016/j.bjm.2016.12.009 |
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Idioma: |
Inglês |
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Conteúdo: |
Expression of pectinolytic genes is regulated by catabolic repression limiting the productionof pectin lyase (PL) if the natural inducer, pectin, is missing from the growth medium. Here,we report the isolation of Penicillium griseoroseum mutants resistant to 2-deoxy-d-glucose(DG) that show resistance to catabolite repression and overproduce PL. Three spontaneousand nine UV-induced mutants were obtained. Some mutants produced sectors (segmentsmorphologically different) that were also studied. The mutants were analyzed for pectinasesproduction on pectinase-agar plates and five mutants and two sectors showing larger clear-ing zones than the wild type were selected for quantitative assay. Although PL productionhigher than the wild type has been found, phenotype instability was observed for most ofthe mutants and, after transfers to nonselective medium, the DG resistance was no longerpresent. Only mutants M03 and M04 were stable maintaining the DG-resistance phenotype.When growing for 120 h in liquid medium containing glucose with or without pectin, bothmutants showed higher PL production. In the presence of glucose as sole carbon source, themutant M03 produced 7.8-fold more PL than the wild type. Due its phenotypic stability andPL overproduction, the mutant M03 presents potential for industrial applications. |
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Palavras-Chave: |
Pectinolytic complex; Spontaneous mutant; Ultraviolet mutagenesis. |
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Thesagro: |
Microbiologia; Mutação. |
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Thesaurus NAL: |
Microbiology; Mutation. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1084275/1/Pectin-lyase-overproduction-by-Penicillium-griseoroseum-mutants.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/170232/1/ID44256-2017v48n4p602BrazJMicrobiol.pdf
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Marc: |
LEADER 02130naa a2200253 a 4500
001 2084275
005 2022-08-09
008 2017 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.bjm.2016.12.009$2DOI
100 1 $aLIMA, J. O.
245 $aPectin lyase overproduction by Penicillium griseoroseum mutants resistant to catabolite repression.$h[electronic resource]
260 $c2017
520 $aExpression of pectinolytic genes is regulated by catabolic repression limiting the productionof pectin lyase (PL) if the natural inducer, pectin, is missing from the growth medium. Here,we report the isolation of Penicillium griseoroseum mutants resistant to 2-deoxy-d-glucose(DG) that show resistance to catabolite repression and overproduce PL. Three spontaneousand nine UV-induced mutants were obtained. Some mutants produced sectors (segmentsmorphologically different) that were also studied. The mutants were analyzed for pectinasesproduction on pectinase-agar plates and five mutants and two sectors showing larger clear-ing zones than the wild type were selected for quantitative assay. Although PL productionhigher than the wild type has been found, phenotype instability was observed for most ofthe mutants and, after transfers to nonselective medium, the DG resistance was no longerpresent. Only mutants M03 and M04 were stable maintaining the DG-resistance phenotype.When growing for 120 h in liquid medium containing glucose with or without pectin, bothmutants showed higher PL production. In the presence of glucose as sole carbon source, themutant M03 produced 7.8-fold more PL than the wild type. Due its phenotypic stability andPL overproduction, the mutant M03 presents potential for industrial applications.
650 $aMicrobiology
650 $aMutation
650 $aMicrobiologia
650 $aMutação
653 $aPectinolytic complex
653 $aSpontaneous mutant
653 $aUltraviolet mutagenesis
700 1 $aPEREIRA, J. F.
700 1 $aARAÚJO, R. F. de
700 1 $aQUEIROZ, M. V. de
773 $tBrazilian Journal of Microbiology, São Paulo$gv. 48, n. 3, p. 602-606, 2017.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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| 1. |  | 0900875, RELATORIO TECNICO ANUAL. EMBRAPA. CNPSA, EMBRAPA-CNPSA, Concordia-SC
Biblioteca(s): Catálogo Coletivo de Periódicos Embrapa; Embrapa Acre; Embrapa Amapá; Embrapa Amazônia Oriental; Embrapa Pantanal. |   |
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