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Registro Completo |
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
19/03/2012 |
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Data da última atualização: |
09/04/2012 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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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 |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/55950/1/Artigo-Environmental-and-Experimental-Botany-2012.pdf
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Marc: |
LEADER 02520naa a2200217 a 4500
001 1919316
005 2012-04-09
008 2012 bl uuuu u00u1 u #d
100 1 $aCHAVES, A. R. de M.
245 $aVarying leaf-to-fruit ratios affect branch growth and dieback, with little to no effect on photosynthesis, carbohydrate or mineral pools, in different canopy positions of field-grown coffee trees.$h[electronic resource]
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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Registro original: |
Embrapa Semiárido (CPATSA) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroindústria de Alimentos. Para informações adicionais entre em contato com ctaa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agroindústria de Alimentos. |
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Data corrente: |
01/02/2018 |
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Data da última atualização: |
05/03/2020 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
VILELA, E. F.; RECH FILHO, E. L.; MARTHA JUNIOR, G. B.; ALVES, E. R. de A.; LOPES, M. A.; GUIMARAES, E. P.; CABRAL, P. R.; SOARES, C. O.; ROSINHA, G. M. S.; BUAINAIN, A. M.; NUTTI, M. R.; CALEGAR, G. M. |
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Afiliação: |
Evaldo Ferreira Vilela, UFV; ELIBIO LEOPOLDO RECH FILHO, Cenargen; GERALDO BUENO MARTHA JUNIOR, CNPTIA; ELISEU ROBERTO DE ANDRADE ALVES, DE/PR; MAURICIO ANTONIO LOPES, CNPAE; ELCIO PERPETUO GUIMARAES, CNPAF; Paulo Renato Cabral; CLEBER OLIVEIRA SOARES, DEIT; GRACIA MARIA SOARES ROSINHA, CNPGC; Antônio Marcio Buainain; MARILIA REGINI NUTTI, CTAA; GERALDO MAGELA CALEGAR, CNPGL. |
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Título: |
Food and Nutrition Security in Brazil. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
In: IANAS. Challenges and opportunities for food and nutrition security in the Americas: The view of the Academies of Sciences. Ciudad de Mexico: IANAS, 2017. p. 76-109. |
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ISBN: |
978-607-8379-29-3 |
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Idioma: |
Inglês |
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Notas: |
IANAS Regional Report november 2017. Tít. em espanhol: Food and Nutrition Security in Brazil. In: Retos y oportunidades de la seguridad alimentaria y nutricional en las Américas: El punto de vista de las Academias de Ciencias. |
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Conteúdo: |
In the past 40 years, the agricultural public and private sectors of Brazil have been working in close collaboration, to promote one of the most impressive and successful sustainable agricultural developments in a middle income country. Brazil has become an example of a food secure country and one the of world?s most important agricultural export countries. Mention should be made of the outstanding role played by the agricultural research technology developed by Brazilian research organizations, led by the agricultural research system encompassing agricultural universities, the Brazilian Agricultural Research Organization (EMBRAPA) and the state agricultural research organizations. This comprehensive executive summary outlines the future challenges and opportunities for the Brazilian agricultural sector in terms of science, technology and innovation, to keep agriculture improving its performance in a world that faces the enormous challenge of feeding a hungry population now and in the following decades. These challenges and opportunities were identified by a select group of highly qualified Brazilian researchers who have spent a lifetime generating and adapting new technology for the development of the Brazilian agriculture sector. |
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Thesagro: |
Nutrição Humana; Segurança Alimentar. |
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Thesaurus NAL: |
Food and Human Nutrition; Food security. |
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Categoria do assunto: |
Q Alimentos e Nutrição Humana |
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Marc: |
LEADER 02481naa a2200325 a 4500
001 2086913
005 2020-03-05
008 2017 bl uuuu u00u1 u #d
020 $a978-607-8379-29-3
100 1 $aVILELA, E. F.
245 $aFood and Nutrition Security in Brazil.$h[electronic resource]
260 $c2017
500 $aIANAS Regional Report november 2017. Tít. em espanhol: Food and Nutrition Security in Brazil. In: Retos y oportunidades de la seguridad alimentaria y nutricional en las Américas: El punto de vista de las Academias de Ciencias.
520 $aIn the past 40 years, the agricultural public and private sectors of Brazil have been working in close collaboration, to promote one of the most impressive and successful sustainable agricultural developments in a middle income country. Brazil has become an example of a food secure country and one the of world?s most important agricultural export countries. Mention should be made of the outstanding role played by the agricultural research technology developed by Brazilian research organizations, led by the agricultural research system encompassing agricultural universities, the Brazilian Agricultural Research Organization (EMBRAPA) and the state agricultural research organizations. This comprehensive executive summary outlines the future challenges and opportunities for the Brazilian agricultural sector in terms of science, technology and innovation, to keep agriculture improving its performance in a world that faces the enormous challenge of feeding a hungry population now and in the following decades. These challenges and opportunities were identified by a select group of highly qualified Brazilian researchers who have spent a lifetime generating and adapting new technology for the development of the Brazilian agriculture sector.
650 $aFood and Human Nutrition
650 $aFood security
650 $aNutrição Humana
650 $aSegurança Alimentar
700 1 $aRECH FILHO, E. L.
700 1 $aMARTHA JUNIOR, G. B.
700 1 $aALVES, E. R. de A.
700 1 $aLOPES, M. A.
700 1 $aGUIMARAES, E. P.
700 1 $aCABRAL, P. R.
700 1 $aSOARES, C. O.
700 1 $aROSINHA, G. M. S.
700 1 $aBUAINAIN, A. M.
700 1 $aNUTTI, M. R.
700 1 $aCALEGAR, G. M.
773 $tIn: IANAS. Challenges and opportunities for food and nutrition security in the Americas: The view of the Academies of Sciences. Ciudad de Mexico: IANAS, 2017. p. 76-109.
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