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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
22/05/2006 |
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Data da última atualização: |
22/05/2006 |
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Autoria: |
MERCIER, H. SOUZA, B. M. KRAUS, J. E. HAMASAKI, R. M. SOTTA, B. |
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Afiliação: |
Universidade de São Paulo. |
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Título: |
Endogenous auxin and cytokinin contents associated with shoot formation in leaves of pineapple cultured in vitro |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Brazilian Journal of Plant Physiology, Londrina, v. 15, n. 2, p. 107-112, 2003. |
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ISSN: |
1677-0420 |
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Idioma: |
Inglês |
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Conteúdo: |
The in vitro culture of pineapple leaves on a shoot induction medim (SIM) results in the formation of protuberances and further development in shoots, and plantlets. The contents of endogenous indoleacetic acid (IAA) and five cytokinins (Cks), N6(2-isopentenyl)adenine (iP), N6(2-isopentenyl)adenosine (iPR), zeatin riboside (ZR) and N6-benzyladenine (BA), present in the basal portion of those leaves, were correlated to the organogenic response that occurs over 15 days of culture. The endogenous auxin/cytokinins ratio was lowest on the 3rd day, mainly due to a strong increase in the iP level. It seems that endogenous iP concentration triggered the induction signal for an organogenic response in pineapple leaf bases. The rise in iP content required the presence of BA and a-naphthaleneacetic acid (NAA) in the medium, suggesting that endogenous iP production is regulated in response to these growth regulator uptakes. |
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Palavras-Chave: |
auxin; cytokinin; hormone signalling; plant regeneration. |
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Thesagro: |
Ananás Comosus; Bromeliaceae. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01595naa a2200205 a 4500
001 1651718
005 2006-05-22
008 2003 bl uuuu u00u1 u #d
022 $a1677-0420
100 1 $aMERCIER, H. SOUZA, B. M. KRAUS, J. E. HAMASAKI, R. M. SOTTA, B.
245 $aEndogenous auxin and cytokinin contents associated with shoot formation in leaves of pineapple cultured in vitro
260 $c2003
520 $aThe in vitro culture of pineapple leaves on a shoot induction medim (SIM) results in the formation of protuberances and further development in shoots, and plantlets. The contents of endogenous indoleacetic acid (IAA) and five cytokinins (Cks), N6(2-isopentenyl)adenine (iP), N6(2-isopentenyl)adenosine (iPR), zeatin riboside (ZR) and N6-benzyladenine (BA), present in the basal portion of those leaves, were correlated to the organogenic response that occurs over 15 days of culture. The endogenous auxin/cytokinins ratio was lowest on the 3rd day, mainly due to a strong increase in the iP level. It seems that endogenous iP concentration triggered the induction signal for an organogenic response in pineapple leaf bases. The rise in iP content required the presence of BA and a-naphthaleneacetic acid (NAA) in the medium, suggesting that endogenous iP production is regulated in response to these growth regulator uptakes.
650 $aAnanás Comosus
650 $aBromeliaceae
653 $aauxin
653 $acytokinin
653 $ahormone signalling
653 $aplant regeneration
773 $tBrazilian Journal of Plant Physiology, Londrina$gv. 15, n. 2, p. 107-112, 2003.
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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| Registros recuperados : 5 | |
| 5. |  | BARCELOS, E.; CHAILLARD, H.; NUNES, C. D. M.; MACEDO, J. L. V.; RODRIGUES, M. do R. L.; CUNHA, R. N. V. da; TAVARES, A. M.; DANTAS, J. C. R.; BORGES, R. de S.; SANTOS, W. C. dos. A cultura do dendê. Brasília, DF: EMBRAPA-SPI; Manaus: EMBRAPA-CPAA, 1995. 68 p., il. color. (Coleção plantar, 32). Também em edição especial, que compõe o acervo do Projeto Minibibliotecas da Embrapa.| Tipo: Autoria/Organização/Edição de Livros |
| Biblioteca(s): Embrapa Amazônia Ocidental; Embrapa Unidades Centrais. |
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| Registros recuperados : 5 | |
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