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| Itaya,Nair Massumi; Vaz,Ana Paula Artimonte; Kerbauy,Gilberto B.; Figueiredo-Ribeiro,Rita de Cássia L.. |
| Viguiera discolor Baker é uma espécie nativa do cerrado, cuja sobrevivência está ameaçada pela invasão de espécies exóticas. Considerando sua elevada produção e a vasta aplicação de frutanos, o presente trabalho foi conduzido visando à obtenção in vitro dessa espécie e à prospecção desses carboidratos nessas condições. Sementes foram germinadas in vitro, em meio MS modificado, e após cinco semanas de incubação, nós caulinares foram isolados e incubados no mesmo meio adicionado de 0,5 mg L-1 de ANA, regenerando plantas uniformes, raízesnão espessadas, raízes tuberosas e estruturas semelhantes a calo (calo tipo1), formadas na região caulinar basal. Análise desse material evidenciou a presença de frutanos do tipo inulina nas raízes tuberosas e nos calos tipo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado; Inulina; Carboidratos de reserva; Raízes tuberosas. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062005000300019 |
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| Booz,Maristela Raitz; Kerbauy,Gilberto B.; Guerra,Miguel Pedro; Pescador,Rosete. |
| The γ-aminobutyric acid (Gaba) is a non-protein amino acid found in prokaryotes and eukaryotes. Its role in plant development has not been fully established. This study reports a quantification of the levels of endogenous Gaba, as well as investigation of its role in different stages of somatic embryogenesis in Acca sellowiana Berg. (Myrtaceae). Zygotic embryos were used as explants and they were inoculated into the culture medium contained different concentrations of Gaba (0,2, 4, 6, 8 and 10 µM). The highest concentrations of endogenous Gaba were detected between the third and nine days after inoculation, reaching the value of 12.77 µmol.g-1FW. High frequency of somatic embryogenesis was observed in response to 10 µM Gaba. This treatment also resulted in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acid; Pineapple guava; Plant growth. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000400003 |
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| Suzuki,Rogério M.; Kerbauy,Gilberto B.. |
| This study attempted to clarify the effects of dark, light and ethylene on plant growth and endogenous levels of indole-3-acetic acid (IAA), cytokinins and abscisic acid in Catasetum fimbriatum. Dark-incubation fully inhibited root and pseudobulb formation as well as leaf growth, but favored shoot elongation. The results of continuous and active growth in dark-incubated shoots (stolons) were induced by strong apical meristem sink activity and by the significantly increased levels of cytokinins in shoots. In fact, shoot length, cytokinin and IAA levels in dark-incubated shoots were about twice as great as for those grown under light conditions. Moreover, the total cytokinin level in shoots of C. fimbriatum under light conditions without ethylene was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Auxin; Cytokinins; Etiolation; Plant growth; Plant hormones. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202006000300002 |
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