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| 1. |  | SILVA, N. G. da; ASSUNÇÃO, R. de. Custo operacional, exigência física de fatores e renda da cultura da cenoura, Moji das Cruzes, Estado de São Paulo, janeiro de 1981. Informações Econômicas, São Paulo, v. 11, n. 5, p. 19-22, 1981.| Biblioteca(s): Embrapa Hortaliças. |
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| 7. | | BANDEIRA, A. H.; MEDEIROS, S. L. P.; EMYGDIO, B. M.; BIONDO, J. C.; SILVA, N. G. da; LEAL, L. T. Temperatura base inferior e exigência térmica de genótipos de sorgo sacarino. Revista Brasileira de Milho e Sorgo, v. 15, n. 2, p. 249-259, 2016.| Biblioteca(s): Embrapa Clima Temperado; Embrapa Milho e Sorgo. |
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| 8. | | BANDEIRA, A. H.; MÜLLER, L.; MEDEIROS, S. L. P.; LEAL, L. T.; SILVA, N. G. da; EMYGDIO, B. M.; BIONDO, J. C. Parâmetros fitotécnicos de sorgo sacarino BRS 506, cultivado em distintas épocas de semeaduras e espaçamento de entrelinhas. In: SIMPÓSIO ESTADUAL DE AGROENERGIA, 4.; REUNIÃO TÉCNICA DE AGROENERGIA, 4., 2012, AMRIGS: Porto Alegre. Anais... Pelotas: Embrapa Clima Temperado, 2012.| Biblioteca(s): Embrapa Clima Temperado. |
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| 9. | | BANDEIRA, A. H.; MÜLLER, L.; MEDEIROS, S. L. P.; LEAL, L. T.; SILVA, N. G. da; EMYGDIO, B. M.; BIONDO, J. C. Parâmetros tecnológicos de sorgo sacarino BRS 506, cultivado em distintas épocas de semeaduras e espaçamento de entrelinhas. In: SIMPÓSIO ESTADUAL DE AGROENERGIA, 4.; REUNIÃO TÉCNICA DE AGROENERGIA, 4., 2012, AMRIGS: Porto Alegre. Anais... Pelotas: Embrapa Clima Temperado, 2012.| Biblioteca(s): Embrapa Clima Temperado. |
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| 10. | | REIS, V. C. da S.; TEIXEIRA, A. H. de C.; SOUZA, E. A. de; LIMA NETO, M. J.; SILVA, N. G. da. Preliminary study of fungi spores in mango crop as affected by microclimate. In: INTERNATIONAL MANGO SYMPOSIUM, 7., 2002, Recife. Program and abstracts... Fortaleza: Embrapa Agroindústria Tropical; Planaltina: Embrapa Cerrados; Cruz da Almas: Embrapa Mandioca e Fruticultura; Teresina: Embrapa Meio-Norte; Petrolina: Embrapa Semi-Árido; Recife: IPA, 2002. p. 277. (Embrapa Agroindústria Tropical. Documentos, 46).| Biblioteca(s): Embrapa Semiárido. |
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| 11. | | LOPES, D. B.; GONÇALVES, B. M. N.; SANTOS, R. C. dos; MAGALHÃES, E. E.; SILVA, N. G. da; GAVA, C. A. T.; MOREIRA, W. A. Monitoramento de esporos em áreas comerciais de manga e uva no Vale do São Francisco. In: SEMINÁRIO BRASILEIRO DE PRODUÇÃO INTEGRADA DE FRUTAS, 6., 2004, Petrolina. Resumos... Petrolina: Embrapa Semi-Árido: Valexport, 2004. 1 CD-ROM.| Biblioteca(s): Embrapa Semiárido. |
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| 12. | | BARROS, A. M. C.; PINTO, A. C. da S.; SIMPLICIO, F. G.; CHAVES, F. C. M.; SILVA, N. G. da; OLIVEIRA, K. M. T. de; LIMA, E. S.; FRANCO, A. M. R. Antileishmanial and cytotoxic activity of dillapiole n-butyl ether. Acta Amazônica, v. 53, n. 4, p. 285-293, out./dez. 2023. Título em Português: Atividade antileishmania e citotóxica do éter n-butil dilapiol.| Biblioteca(s): Embrapa Amazônia Ocidental. |
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Registro Completo
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Biblioteca(s): |
Embrapa Roraima. |
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Data corrente: |
15/07/2013 |
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Data da última atualização: |
25/10/2018 |
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Autoria: |
CHAVES, A. R. de M.; MARTINS, S. C. V.; BATISTA, K. D.; CELIN, E. F.; MATTA, F. M. da. |
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Afiliação: |
AGNALDO RODRIGUES DE MELO CHAVES, CPATSA; SAMUEL C. V. MARTINS; KARINE D. BATISTA; ELAINE F. CELIN; FÁBIO M. DA MATTA. |
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Título: |
Varying leaf-to-fruit ratios affect branch growth and dieback, with little to no effect on photosynthesis, carbohydrate or mineral pools, in different canopy positions of field-grown coffee trees. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Environmental and Experimental Botany, v. 77, p. 207-218, 2012. |
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Idioma: |
Inglês |
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Conteúdo: |
Heavy bearing is a typical phenomenon on unshaded coffee (Coffea arabica L.) trees and limits both the production and retention of leaves, leading to branch dieback, and, thus, results in a strong biennial bearing pattern. The major goals of this study were to investigate the physiological mechanisms that may be associated with the leaf-to-fruit ratio (LFR), branch dieback, biennial production and the relationships between carbohydrate and mineral fluctuations and branch dieback in coffee plants. The trees were grown in north?south-oriented hedgerows under conditions of full sunlight. Leaves and plagiotropic branches from the upper and lower strata of the east- and west-facing sides of the hedgerow were examined. A strong biennial pattern of coffee production was observed over three harvests. Overall, the east face of the hedgerow produced a more sellable crop than the west face, and this was associated with more light availability for the east-facing branches. The branch growth rate was higher with an increasing LFR during 2006?2007, regardless of the canopy position, and no compensatory increase in the photosynthetic rate was found in response to a decreasing LFR. Due to a relatively low fruit yield in 2007?2008, there was no branch dieback. The extent of branch dieback increased dramatically with decreasing LFR and was probably not closely related to changes in the concentrations of carbohydrates, amino acids and minerals. The extent of branch dieback was apparently unrelated to the differences in the photosynthetic rates per unit leaf area, carbon isotope composition, or oxidative stress, as was assessed by the electrolyte leakage from the leaf tissues. We discuss these responses in terms of the relative lack of branch autonomy in coffee trees. MenosHeavy bearing is a typical phenomenon on unshaded coffee (Coffea arabica L.) trees and limits both the production and retention of leaves, leading to branch dieback, and, thus, results in a strong biennial bearing pattern. The major goals of this study were to investigate the physiological mechanisms that may be associated with the leaf-to-fruit ratio (LFR), branch dieback, biennial production and the relationships between carbohydrate and mineral fluctuations and branch dieback in coffee plants. The trees were grown in north?south-oriented hedgerows under conditions of full sunlight. Leaves and plagiotropic branches from the upper and lower strata of the east- and west-facing sides of the hedgerow were examined. A strong biennial pattern of coffee production was observed over three harvests. Overall, the east face of the hedgerow produced a more sellable crop than the west face, and this was associated with more light availability for the east-facing branches. The branch growth rate was higher with an increasing LFR during 2006?2007, regardless of the canopy position, and no compensatory increase in the photosynthetic rate was found in response to a decreasing LFR. Due to a relatively low fruit yield in 2007?2008, there was no branch dieback. The extent of branch dieback increased dramatically with decreasing LFR and was probably not closely related to changes in the concentrations of carbohydrates, amino acids and minerals. The extent of branch dieback was apparently unrel... Mostrar Tudo |
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Palavras-Chave: |
Cultivo. |
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Thesagro: |
Café; Crescimento; Fotossíntese. |
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Categoria do assunto: |
A Sistemas de Cultivo |
|
Marc: |
LEADER 02497naa a2200217 a 4500
001 1962146
005 2018-10-25
008 2012 bl --- 0-- u #d
100 1 $aCHAVES, A. R. de M.
245 $aVarying leaf-to-fruit ratios affect branch growth and dieback, with little to no effect on photosynthesis, carbohydrate or mineral pools, in different canopy positions of field-grown coffee trees.
260 $c2012
520 $aHeavy bearing is a typical phenomenon on unshaded coffee (Coffea arabica L.) trees and limits both the production and retention of leaves, leading to branch dieback, and, thus, results in a strong biennial bearing pattern. The major goals of this study were to investigate the physiological mechanisms that may be associated with the leaf-to-fruit ratio (LFR), branch dieback, biennial production and the relationships between carbohydrate and mineral fluctuations and branch dieback in coffee plants. The trees were grown in north?south-oriented hedgerows under conditions of full sunlight. Leaves and plagiotropic branches from the upper and lower strata of the east- and west-facing sides of the hedgerow were examined. A strong biennial pattern of coffee production was observed over three harvests. Overall, the east face of the hedgerow produced a more sellable crop than the west face, and this was associated with more light availability for the east-facing branches. The branch growth rate was higher with an increasing LFR during 2006?2007, regardless of the canopy position, and no compensatory increase in the photosynthetic rate was found in response to a decreasing LFR. Due to a relatively low fruit yield in 2007?2008, there was no branch dieback. The extent of branch dieback increased dramatically with decreasing LFR and was probably not closely related to changes in the concentrations of carbohydrates, amino acids and minerals. The extent of branch dieback was apparently unrelated to the differences in the photosynthetic rates per unit leaf area, carbon isotope composition, or oxidative stress, as was assessed by the electrolyte leakage from the leaf tissues. We discuss these responses in terms of the relative lack of branch autonomy in coffee trees.
650 $aCafé
650 $aCrescimento
650 $aFotossíntese
653 $aCultivo
700 1 $aMARTINS, S. C. V.
700 1 $aBATISTA, K. D.
700 1 $aCELIN, E. F.
700 1 $aMATTA, F. M. da
773 $tEnvironmental and Experimental Botany$gv. 77, p. 207-218, 2012.
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