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| 12. |  | COUTO, S.M.; MAGALHAES, A.C.; QUEIROZ, D.M.de; BASTOS, I.T. Massa especifica aparente e real e porosidade de graos de cafe em funcao do teor de umidade. Revista Brasileira de Engenharia Agricola e Ambiental, Campina Grande, PB, v.3, n.1, p.61-68, jan./abr. 1999.| Biblioteca(s): Epagri-Sede. |
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| 13. | | AFONSO JUNIOR, P.C.; CORREA, P.C.; QUEIROZ, D.M.de. Modelamento da perda de qualidade de sementes de soja, em funcao das condicoes iniciais e da atmosfera no armazenamento. Revista Brasileira de Engenharia Agricola e Ambiental, Campina Grande, PB, v.3, n.2, p.403-408, maio/ago. 1999.| Biblioteca(s): Epagri-Sede. |
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| 19. | | VALENTE, D. S. M.; QUEIROZ, D. M. de; PINTO, F. de A. de C.; SANTOS, N. T.; SANTOS, F. L. Definition of management zones in coffee production fields based on apparent soil electrical conductivity. Scientia Agricola, Piracicaba, SP, v. 69, n. 3, p. 173-179, may./jun. 2012.| Biblioteca(s): Epagri-Sede. |
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| 20. | | BERBERT, P.A.; STENNING, B.C.; SILVA, J.de S. e; QUEIROZ, D.M.de; MELO, E.de C. Derivacao de uma equacao para o calculo do teor de umidade de sementes de trigo utilizando-se o fator de qualidade Q. Revista Brasileira de Engenharia Agricola e Ambiental, Campina Grande, PB, v.3, n.2, p.202-210, maio/ago. 1999.| Biblioteca(s): Epagri-Sede. |
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| Registros recuperados : 39 | |
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Registro Completo
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
23/08/2013 |
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Data da última atualização: |
23/08/2013 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
PERES, L. E. P.; KERBAUY, G. B.; SALATINO, A.; ZAFFARI, G. R.; MERCIER, H. |
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Título: |
Effects of Auxin, Cytokinin and Ethylene Treatments on the Endogenous Ethylene and Auxin-to-cytokinins Ratio Related to direct Root Tip Conversion of Catasetum fimbriatum Lindl. (Orchidaceae) into Buds. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
Journal of Plant Physiology, USA, v. 155, p. 551-555, 1999. |
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Idioma: |
Português |
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Conteúdo: |
The present investigation attempts to correlate the effect of the exogenous auxins, cyrokinins and ethylene with rhe endogenous ethylene and auxin-ro-cytokinin ratio, and with the direct root-to-bud conversion in Catasetum fimbriatum. lncubation of root tips with IAA and NAA strongly inhibited both root elongation and bud formation. On the other hand, treatment with IBA resulted in a conspicuous stirnulation of longitudinal root growth, while bud formation was retarded. High levels of exogenous zearin, iP and BA enhanced bud formation, and inhibited root growth. Ethylene production was measured in IAA, IBA and zeatin-treated roots. AlI growth regulators elicited ethylene evolution, which decreased considerably along the period of incubation. Addition of AVG to the media reduced ethylene evolution. Endogenous auxin, cytokinins, and ABA conrents were determined by means of HPLC and ELISA rnethods in root tips of C. fimbriatum pre-incubated with ethylene (CEPA) and cyrokinin (iP). Both exogenous substances stimulated bud formation and conduced to an endogenous IAAlCks rario favourable to Cks. From rhese results it is proposed that the stimulatory effect of exogenous Cks and ethylene on root-to-bud conversion of C. fimbriatum seems to be mediated by rhe establishment of an endogenous auxin-to-cytokinins balance favourable to shoot formation. |
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Palavras-Chave: |
Orchid; Organogenesis; Plant hormones; Root meristem. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02102naa a2200217 a 4500
001 1118892
005 2013-08-23
008 1999 bl uuuu u00u1 u #d
100 1 $aPERES, L. E. P.
245 $aEffects of Auxin, Cytokinin and Ethylene Treatments on the Endogenous Ethylene and Auxin-to-cytokinins Ratio Related to direct Root Tip Conversion of Catasetum fimbriatum Lindl. (Orchidaceae) into Buds.$h[electronic resource]
260 $c1999
520 $aThe present investigation attempts to correlate the effect of the exogenous auxins, cyrokinins and ethylene with rhe endogenous ethylene and auxin-ro-cytokinin ratio, and with the direct root-to-bud conversion in Catasetum fimbriatum. lncubation of root tips with IAA and NAA strongly inhibited both root elongation and bud formation. On the other hand, treatment with IBA resulted in a conspicuous stirnulation of longitudinal root growth, while bud formation was retarded. High levels of exogenous zearin, iP and BA enhanced bud formation, and inhibited root growth. Ethylene production was measured in IAA, IBA and zeatin-treated roots. AlI growth regulators elicited ethylene evolution, which decreased considerably along the period of incubation. Addition of AVG to the media reduced ethylene evolution. Endogenous auxin, cytokinins, and ABA conrents were determined by means of HPLC and ELISA rnethods in root tips of C. fimbriatum pre-incubated with ethylene (CEPA) and cyrokinin (iP). Both exogenous substances stimulated bud formation and conduced to an endogenous IAAlCks rario favourable to Cks. From rhese results it is proposed that the stimulatory effect of exogenous Cks and ethylene on root-to-bud conversion of C. fimbriatum seems to be mediated by rhe establishment of an endogenous auxin-to-cytokinins balance favourable to shoot formation.
653 $aOrchid
653 $aOrganogenesis
653 $aPlant hormones
653 $aRoot meristem
700 1 $aKERBAUY, G. B.
700 1 $aSALATINO, A.
700 1 $aZAFFARI, G. R.
700 1 $aMERCIER, H.
773 $tJournal of Plant Physiology, USA$gv. 155, p. 551-555, 1999.
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