| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com rosangela.lacerda@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Milho e Sorgo. |
|
Data corrente: |
08/01/1998 |
|
Data da última atualização: |
13/07/2018 |
|
Autoria: |
GEETHA, K. B.; LENDING, C. R.; LOPES, M. A.; WALLACE, J. C.; LARKINS, B. A. |
|
Título: |
Opaque-2 modifiers increase y-zein synthesis and alter its spatial distribution in maize endosperm. |
|
Ano de publicação: |
1991 |
|
Fonte/Imprenta: |
Plant Cell, Rockville, v. 3, n. 11, p. 1207-1219, Nov. 1991. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Through the action of opaque-2 modifier genes, the soft, floury of opaque-2 mutants is converted to a vitreous phenotype. This change in endosperm texture is associated with a twofold to threefold increase in y-zein content. To investigate the effect of opaque-2 modifiers on the expression of y-zein genes, we analyzed the synthesis and distribution of y-zein protein and the level of y-zein mRNAs in developing endosperms of the inbreds W644 and W644o2, a modified opaque-2 mutant Poll 34 QP,, and their reciprocal F1 hybrids. We also characterized the number and organization of y-zein genes in these and related maize genotypes. Our studies show that opaque-2 modifiers are semidominant genes, resulting in a twofold to threefold increase in y-zein gene expression in both opaque-2 and normal genetic backgrounds. The increase in gene expression appears to e a conseguence of copies in modified as well as nonmodified genetic backgrounds. Ultrastructural studies showed that y-zein occurs in high concentration in the first few subaleurone cells of nonmodified endosperm, but high concentrations of y-zein occur in the subaleurone and central endosperm cells of modified opaque-2 mutants. The increased concentration and distribution of y-zein in modified endosperm are highly correlated with the activity of opaque-2 modifier genes. |
|
Palavras-Chave: |
Maize; Molecular; Opaco-2; Opaque 2; Protein; QPM. |
|
Thesagro: |
Milho; Qualidade; Zea Mays. |
|
Thesaurus Nal: |
molecular biology. |
|
Categoria do assunto: |
S Ciências Biológicas |
|
Marc: |
LEADER 02113naa a2200289 a 4500
001 1478285
005 2018-07-13
008 1991 bl uuuu u00u1 u #d
100 1 $aGEETHA, K. B.
245 $aOpaque-2 modifiers increase y-zein synthesis and alter its spatial distribution in maize endosperm.$h[electronic resource]
260 $c1991
520 $aThrough the action of opaque-2 modifier genes, the soft, floury of opaque-2 mutants is converted to a vitreous phenotype. This change in endosperm texture is associated with a twofold to threefold increase in y-zein content. To investigate the effect of opaque-2 modifiers on the expression of y-zein genes, we analyzed the synthesis and distribution of y-zein protein and the level of y-zein mRNAs in developing endosperms of the inbreds W644 and W644o2, a modified opaque-2 mutant Poll 34 QP,, and their reciprocal F1 hybrids. We also characterized the number and organization of y-zein genes in these and related maize genotypes. Our studies show that opaque-2 modifiers are semidominant genes, resulting in a twofold to threefold increase in y-zein gene expression in both opaque-2 and normal genetic backgrounds. The increase in gene expression appears to e a conseguence of copies in modified as well as nonmodified genetic backgrounds. Ultrastructural studies showed that y-zein occurs in high concentration in the first few subaleurone cells of nonmodified endosperm, but high concentrations of y-zein occur in the subaleurone and central endosperm cells of modified opaque-2 mutants. The increased concentration and distribution of y-zein in modified endosperm are highly correlated with the activity of opaque-2 modifier genes.
650 $amolecular biology
650 $aMilho
650 $aQualidade
650 $aZea Mays
653 $aMaize
653 $aMolecular
653 $aOpaco-2
653 $aOpaque 2
653 $aProtein
653 $aQPM
700 1 $aLENDING, C. R.
700 1 $aLOPES, M. A.
700 1 $aWALLACE, J. C.
700 1 $aLARKINS, B. A.
773 $tPlant Cell, Rockville$gv. 3, n. 11, p. 1207-1219, Nov. 1991.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 7 | |
| 1. |  | TAMBASCO-STUDART, M.; TAMBASCO, D. D.; ALENCAR, M. M. de; COUTINHO, L. L.; SURIANO, M.; VASCONCELLOS, L. P. M. K.; REGITANO, L. C. de A. Caracterização de animais da raça Simental com base em 10 marcadores moleculares. In: CONGRESSO NACIONAL DE GENÉTICA, 47., 2001. Águas de Lindóia, SP. Anais... Águas de Lindóia: SBG, 2001.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
|    |
| 2. | | REGITANO, L. C. de A.; JORGE, E. C.; PACKER, I. U.; BARBOSA, P. F.; VASCONCELLOS, L. P. M. K.; TAMBASCO-STUDART, M.; COUTINHO, L. L. A study of genetic variability in Canchim (5/8 Charolais, 3/8 Zebu) based on 8 molecular markers. In: GLOBAL CONFERENCE ON CONSERVATION OF DOMESTIC ANIMAL GENETIC RESOURCES, 15., 2000, Brasília, DF. Conservation and biotecnology: a balaced appoach for the new millennium - proceedings. Brasília: Embrapa Genetic Resourches Genetic and Biotecnology, 2000.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| 3. | | TAMBASCO, D. D.; ALENCAR, M. M. de; COUTINHO, L. L.; PACKER, I. U.; TAMBASCO-STUDART, M.; REGITANO, L. C. de A. A survey of Nellore breed based on nine molecular markers. In: GLOBAL CONFERENCE ON CONSERVATION OF DOMESTIC ANIMAL GENETIC RESOURCES, 15., 2000, Brasilia, DF. Conservation and biotecnology: A balaced appoach for the new millennium - proceedings. Brasilia: Embrapa Genetic Resourches Genetic and Biotecnology, 2000. p. Resumo| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| 4. | | TAMBASCO, D. D.; PAZ, C. C. P.; TAMBASCO-STUDART, M.; PEREIRA, A. P.; ALENCAR, M. M. de; FREITAS, A. R. de; COUTINHO, L. L.; PACKER, I. U.; REGITANO, L. C. de A. Candidate genes for growth traits in beef cattle crosses Bos taurus X Bos indicus. In: WORLD CONGRESS APPLIED TO LIVESCTOCK PRODUCTION, 7., 2002, Montpellier, France. Papers... Montpellier: INRA, 2002. 4 p.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| 5. | | TAMBASCO, D. D.; PAZ, C. C. P.; TAMBASCO-STUDART, M.; PEREIRA, A. P.; ALENCAR, M. M. de; FREITAS, A. R. de; COUTINHO, L. L.; PACKER, I. U.; REGITANO, L. C. de A. Candidate genes for growth traits in beef cattle crosses Bos taurus X Bos indicus. Journal of Animal Breeding and Genetics, v.120, n.1, p.51-56, 2003.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
|  |
| 6. | | TAMBASCO, D. D.; PAZ, C. C. P.; TAMBASCO-STUDART, M.; PEREIRA, A. P.; ALENCAR, M. M. de; FREITAS, A. R. de; COUTINHO, L. L.; PACKER, I. U.; REGITANO, L. C. de A. Candidate genes for growth traits in beff cattle crosses Bos taurus X Bos indicus. Journal of Animal Breeding and Genetics, v. 120, n. 1, p. 51-56, Fev. 2003.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - A |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| 7. | | REGITANO, L. C. de A.; VASCONCELLOS, L. P. M. K.; JACINTO, E.; TAMBASCO-STUDART, M.; TAMBASCO, D. D.; EUCLIDES FILHO, K.; BARBOSA, P. F.; PACKER, I. U.; COUTINHO, L. L. Genetic distances among Aberdeen Angus, Canchim, Caracu, Nellore and Simmental beef cattle breeds. In: GLOBAL CONFERENCE ON CONSERVATION OF DOMESTIC ANIMAL GENETIC RESOURCES, 15., 2000, Brasilia, DF. Conservation and biotecnology: A balaced appoach for the new millennium - proceedings. Brasilia: Embrapa Genetic Resourches Genetic and Biotecnology, 2000.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Pecuária Sudeste. |
| |
| Registros recuperados : 7 | |
|
| Expressão de busca inválida. Verifique!!! |
|
|
