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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
06/06/1995 |
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Data da última atualização: |
18/03/2009 |
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Autoria: |
BRUNE, A. |
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Título: |
Physiology of flowering in Cupressus arizonica greene seedlings. |
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Ano de publicação: |
1973 |
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Fonte/Imprenta: |
1973. |
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Páginas: |
64 f. |
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Idioma: |
Inglês |
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Notas: |
Dissertation (Doctor of Philosophy) - Graduate Council, University of Florida, Florida. |
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Conteúdo: |
Very little is known about physiological changes occurring within a plant during transition to flowering. This work was undertaken in an attempt to learn more about floral induction and to peprfect some techniques with the plant, Cupressus arizonica, which readily responds to chemical treatment of Ga by producing strobili. Conclusions which can be drawn from the present study are: 1. GA3 induces both vegetative and reproductive growth of Cumpressus arizonica. Seedling response is varied; some produce strobili profusely, others scarcely and somenone at all. This suggests that genetic material highly responsive to GA, or nonresponsive, can be clonally propagated and offers better future experimental material. 2. Complete fertilizer or urea application enhances response to GA3 however, the combination of GA and high concentration of urea, is toxic to some Curpressus plants, but those which survive grow considerably taller, and produce both more megasporangiate stribili and more microsporangiate strobili than any other combination of urea, GA and auxin. Presumably an auxin is involved in regulating reproductive development of growth of megasporangiate strobili. The effective concentration of auxin may be different from the one used here. It can be speculated that absorption of hormones through the outer leaves is different from plant to plant, corresponding to the variation in their phenotypic appearance, which shows a remarkable range in color and shape. A preliminary experiment with a limited number of seedlings showed that injection of GA3 is very efficient to insure uptake. 3. Short photoperiodsand application of high GA concentrations are conducive to a higher ratio of megasporangiate strobili to microsporangiate strobili than long photoperiods and applications of low GA concentrations. 4. An efficient method was developed to seletively produce either largely megasporangiate strobili or mirCumpressus arizonica seedlings: applications of GA to the top part of a plant result mainly in production of megasporangiate strobili; whereas, GA applications to the lower branches result almost exclusively in microsporangiate stobili being induced. This is in accord with the view that the control of the kind of strobili produced is dependent on a stimulus and the nutritional status of the plant part where strobili will be initiated. The flowering stimulus has a marked tendency to move upwards. This tendency, and the difefrence of response of applications to the lower and upper part of plants, result in the top of the plant producing megasporangiate if GA is applied to the top, but microsporangiate if application is the lower parts. Thus, the upper branches respond differently depending on where the stimulus was first applied. Considering studies of GA movement in other plants, it is possible to link this difference in response to nutrient contents: GA applied to the lower parts drains carbohydrates down from the top resulting in the production of microsporangiate strobili on the uupper branches; GA applied tothe top moves carbohydrates up, and megasporangiate strobili are produced. This hypothesis can casily by tested following movement of 3h labelled GA and 14C'labelled carbohydrates and content in the plant. 5. Enzyme extration and detection in Cupressus arizonicz tis tues works well, providing relatively large amoiunts of plant material are available. But this is a handicap in detecting enzyme changes in the actual microscopical amounts of tissues where induction and transition to flower bud occurs. Improvements can probably de made in the techniques applied to micro amounts of protein. 6. Genetically homogenous material would be preferable to the variable source material used in these studies. The large range of variation among Cupressus arizonica seedlings is a disadvantage in physiological-biochemical studies. Clones can be established for uniformity. In this aspect Cryptomeria japonica may be more useful. It a commercially more important species, is easily propagated vegetatively, and has larger buds. Cryptomeria japonica also prodeces strobili after GA treatment. MenosVery little is known about physiological changes occurring within a plant during transition to flowering. This work was undertaken in an attempt to learn more about floral induction and to peprfect some techniques with the plant, Cupressus arizonica, which readily responds to chemical treatment of Ga by producing strobili. Conclusions which can be drawn from the present study are: 1. GA3 induces both vegetative and reproductive growth of Cumpressus arizonica. Seedling response is varied; some produce strobili profusely, others scarcely and somenone at all. This suggests that genetic material highly responsive to GA, or nonresponsive, can be clonally propagated and offers better future experimental material. 2. Complete fertilizer or urea application enhances response to GA3 however, the combination of GA and high concentration of urea, is toxic to some Curpressus plants, but those which survive grow considerably taller, and produce both more megasporangiate stribili and more microsporangiate strobili than any other combination of urea, GA and auxin. Presumably an auxin is involved in regulating reproductive development of growth of megasporangiate strobili. The effective concentration of auxin may be different from the one used here. It can be speculated that absorption of hormones through the outer leaves is different from plant to plant, corresponding to the variation in their phenotypic appearance, which shows a remarkable range in color and shape. A preliminary experimen... Mostrar Tudo |
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Thesagro: |
Fisiologia. |
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Thesaurus Nal: |
Cupressus arizonica; plant physiology. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 04631nam a2200169 a 4500
001 1305273
005 2009-03-18
008 1973 bl uuuu m 00u1 u #d
100 1 $aBRUNE, A.
245 $aPhysiology of flowering in Cupressus arizonica greene seedlings.
260 $a1973.$c1973
300 $a64 f.
500 $aDissertation (Doctor of Philosophy) - Graduate Council, University of Florida, Florida.
520 $aVery little is known about physiological changes occurring within a plant during transition to flowering. This work was undertaken in an attempt to learn more about floral induction and to peprfect some techniques with the plant, Cupressus arizonica, which readily responds to chemical treatment of Ga by producing strobili. Conclusions which can be drawn from the present study are: 1. GA3 induces both vegetative and reproductive growth of Cumpressus arizonica. Seedling response is varied; some produce strobili profusely, others scarcely and somenone at all. This suggests that genetic material highly responsive to GA, or nonresponsive, can be clonally propagated and offers better future experimental material. 2. Complete fertilizer or urea application enhances response to GA3 however, the combination of GA and high concentration of urea, is toxic to some Curpressus plants, but those which survive grow considerably taller, and produce both more megasporangiate stribili and more microsporangiate strobili than any other combination of urea, GA and auxin. Presumably an auxin is involved in regulating reproductive development of growth of megasporangiate strobili. The effective concentration of auxin may be different from the one used here. It can be speculated that absorption of hormones through the outer leaves is different from plant to plant, corresponding to the variation in their phenotypic appearance, which shows a remarkable range in color and shape. A preliminary experiment with a limited number of seedlings showed that injection of GA3 is very efficient to insure uptake. 3. Short photoperiodsand application of high GA concentrations are conducive to a higher ratio of megasporangiate strobili to microsporangiate strobili than long photoperiods and applications of low GA concentrations. 4. An efficient method was developed to seletively produce either largely megasporangiate strobili or mirCumpressus arizonica seedlings: applications of GA to the top part of a plant result mainly in production of megasporangiate strobili; whereas, GA applications to the lower branches result almost exclusively in microsporangiate stobili being induced. This is in accord with the view that the control of the kind of strobili produced is dependent on a stimulus and the nutritional status of the plant part where strobili will be initiated. The flowering stimulus has a marked tendency to move upwards. This tendency, and the difefrence of response of applications to the lower and upper part of plants, result in the top of the plant producing megasporangiate if GA is applied to the top, but microsporangiate if application is the lower parts. Thus, the upper branches respond differently depending on where the stimulus was first applied. Considering studies of GA movement in other plants, it is possible to link this difference in response to nutrient contents: GA applied to the lower parts drains carbohydrates down from the top resulting in the production of microsporangiate strobili on the uupper branches; GA applied tothe top moves carbohydrates up, and megasporangiate strobili are produced. This hypothesis can casily by tested following movement of 3h labelled GA and 14C'labelled carbohydrates and content in the plant. 5. Enzyme extration and detection in Cupressus arizonicz tis tues works well, providing relatively large amoiunts of plant material are available. But this is a handicap in detecting enzyme changes in the actual microscopical amounts of tissues where induction and transition to flower bud occurs. Improvements can probably de made in the techniques applied to micro amounts of protein. 6. Genetically homogenous material would be preferable to the variable source material used in these studies. The large range of variation among Cupressus arizonica seedlings is a disadvantage in physiological-biochemical studies. Clones can be established for uniformity. In this aspect Cryptomeria japonica may be more useful. It a commercially more important species, is easily propagated vegetatively, and has larger buds. Cryptomeria japonica also prodeces strobili after GA treatment.
650 $aCupressus arizonica
650 $aplant physiology
650 $aFisiologia
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Registro original: |
Embrapa Florestas (CNPF) |
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| Registros recuperados : 145 | |
| 82. |  | FERNANDES, A. R.; CARVALHO, J. G. de; CONCEICAO, H. E. O. da; SANTIAGO, E. J. A. de. Efeito da calagem e adubação fosfatada sobre a produção de matéria seca das raízes e total, em leguminosa herbáceas. In: CONGRESSO BRASILEIRO DE FISIOLOGIA VEGETAL, 6., 1997, Belém, PA. Resumos. Belém, PA: SBFV, 1997. p. 6.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 83. | | THOMAZ, M. A. A.; VIEGAS, I. de J. M.; SILVA, J. F. da; CONCEIÇÃO, H. E. O. da. Efeito da omissão de macronutrientes e do micronutriente boro no crescimento, sintomas de deficiências nutricionais e na composição mineral de plantas de camu camu. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 17., 2002, Belém, PA. Anais. Belém: SBF, 2002. 4 f. Publicado também: FRAZÃO, D. A. C.; HOMMA, A. K. O; VIÉGAS, I. de J. M. (Ed.). Contribuição ao desenvolvimento da fruticultura na Amazônia. Belém, PA: Embrapa Amazônia Oriental, 2006. p. 219-227.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 85. | | PEREIRA, A. V.; CONCEICAO, H. E. O.; RODRIGUES, F. M.; BERNIZ, J. M. J.; ROSSETI, A. G. Efeito do espacamento sobre o crescimento e producao de porta-enxertos de seringueira. Pesquisa Agropecuaria Brasileira, Brasilia, v.18, n.2, p. 121-127, fev. 1983.| Tipo: Artigo em Periódico Indexado |
| Biblioteca(s): Embrapa Amazônia Ocidental; Embrapa Unidades Centrais. |
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| 86. | | PEREIRA, A. V.; CONCEIÇÃO, H. E. O.; RODRIGUES, F. M.; BERNIZ, J. M. J.; ROSSETTI, A. G. Efeito do espaçamento sobre o crescimento e produção de porta-enxertos de seringueira. In: SEMINÁRIO NACIONAL DA SERINGUEIRA, 3., 1980, Manaus. Anais... Brasília, DF: SUDHEVEA, 1980. v. 2. p. 682-700.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Ocidental. |
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| 89. | | PINTO, J. E. B. P.; CONCEIÇÃO, H. E. O.; CASTRO, N. E. A.; SANTIAGO, E. J. A.; LAMEIRA, O. A. In vitro propagation and quantification of rotenoids in callus of Derris sp. In Vitro Cellular & Developmental Biology, v. 37, n. 3, pt. 2, Mar. 2001. Proceedings of Congress on in Vitro Biology, 2001.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 90. | | QUADROS, B. R. de; GONÇALVES, M. F.; VASCONCELOS, R. D. de; CONCEIÇÃO, H. E. O. da; SILVA, E. S. A. Respostas de crescimento de milho e caupi submetidos a fluoreto de sódio (NaF). In: SIMPÓSIO BRASILEIRO DE ENGENHARIA AGRÍCOLA, 3., 2004, Brasília, DF. Anais. Brasília, DF: Universidade Católica de Brasília, 2004.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 91. | | SANTIAGO, E. J. A. de; FERNANDEZ, A. R.; CONCEICAO, H. E. O. da; CASTRO, A. H. F. Sensibilidade de musaseas do fluoreto atmosférico. In: CONGRESSO BRASILEIRO DE FISIOLOGIA VEGETAL, 6., 1997, Belém, PA. Resumos. Belém, PA: SBFV, 1997. p. 217.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 92. | | AGUIAR, M. V.; CONCEICAO, H. E. O. da; DUARTE, M. de L. R.; ISHIZUKA, Y.; PEREIRA, E. O. L. Seleção de tutores vivos para uso em sistema de cultivo semi-intensivo de pimenteiras-do-reino. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA FCAP, 12.; SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 6., 2002, Belém, PA. A contribuição do profissional de Ciências Agrárias no uso e conservação da biodiversidade: anais. Belém, PA: FCAP: Embrapa Amazônia Oriental, 2002.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 93. | | SANTIAGO, E. J. A. de; PINTO, J. E. B. P.; CASTRO, E. M. de; LAMEIRA, O. A.; CONCEIÇÃO, H. E. O. da; GAVILANES, M. L. Aspectos da anatomia foliar da pimenta-longa (Piper hispidinervum C.DC.) sob diferentes condições de luminosidade. Ciência e Agrotecnologia, Lavras, v. 25, n. 5, p. 1035-1042, 2001. il.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 94. | | SANTOS, J. C. F.; SOUZA, I. F. de; MENDES, A. N. G.; MORAIS, A. R. de; CONCEIÇÃO, H. E. O. da; MARINHO, J. T. de S. Influência alelopática das coberturas mortas de casca de café (Coffea arabica L.) e casca de arroz (Oryza sativa L.) sobre o controle do caruru-de-mancha (Amaranthus viridis L.) em lavoura de café. Ciência e Agrotecnologia, Lavras, v. 25, n. 5, p. 1105-1119, 2001.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 95. | | BARBOSA, A. do S. A.; VIEIRA, I. M. S.; CONCEIÇÃO, H. E. O. da; MONTEIRO, A. L. C.; SANTOS, D. S. B. dos; SANTOS FILHO, B. G. dos. Indução e formação de calos em segmentos foliares de andiroba (Carapa guianensis Aublet). utilizando diferentes concentrações de 2,4-D e BAP. In: CONGRESSO BRASILEIRO DE MELHORAMENTO DE PLANTAS, 2., 2003, Porto Seguro. Melhoramento da qualidade de vida: [anais]. Porto Seguro: SBMP, 2003. Não paginado. il.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 96. | | LOPES, E. C. S.; VIEGAS, I. de J. M.; CARVALHO, J. G. de; FRAZÃO, D. A. C.; CONCEIÇÃO, H. E. O. da; RODRIGUES, J. E. L. F. Influência de doses de boro na produção de massa seca de plantas de urucuzeiro (Bixa orellana L.): cultivares Embrapa 36 e Embrapa 37. Amazônia: Ciência & Desenvolvimento, Belém, PA, v. 3, n. 5, p. 113-124, jul./dez. 2007.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 98. | | STEIN, R. L. B.; ALBUQUERQUE, F. C. de; ROCHA NETO, O. G. da; CONCEIÇÃO, H. E. O. da; BASTOS, C. N.; ENDO, T.; ITO, T. Biologia e fisiologia de Crinipellis perniciosa do cupuaçuzeiro em relação a fisiopatologia. In: EMBRAPA. Centro de Pesquisa Agroflorestal da Amazônia Oriental. Geração de tecnologia agroindustrial para o desenvolvimento do trópico úmido: síntese dos resultados do projeto. Belém, PA: EMBRAPA-CPATU: JICA, 1997. p. 37-39. (EMBRAPA-CPATU. Documentos, 90). Convênio Embrapa Amazônia Oriental/JICA-1990-1997.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 99. | | STEIN, R. L. B.; ALBUQUERQUE, F. C. de; ROCHA NETO, O. G. da; CONCEIÇÃO, H. E. O. da; BASTOS, C. N.; ENDO, T.; ITO, T. Biologia e fisiologia de Crinipellis perniciosa do cupuaçuzeiro, em relação a fisiopatologia. In: EMBRAPA. Centro de Pesquisa Agroflorestal da Amazônia Oriental. Geração de tecnologia agroindustrial para o desenvolvimento do trópico úmido: relatório técnico do projeto. Belém: Embrapa Amazônia Oriental: JICA, 1998. p. 197-231. (Embrapa Amazônia Oriental. Documentos, 102).| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 100. | | FIDELIS, I.; SANTIAGO, E. J. A. de; PINTO, J. E. B. P.; LAMEIRA, O. A.; CARDOSO, M. G.; CONCEIÇÃO, H. E. O. Establishment and anatomic comparison in vitro and in vivo of Brosimum gaudichaudii trec., a medicinal plant from Brazil. In: INTERNATIONAL CONGRESS ON PLANT TISSUE AND CELL CULTURE, 9., 1998, Jerusalem. Abstracts. Jerusalem: Kenes, 1998. p. 99.| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 145 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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