Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesis
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/7145 |
Resumo: | The objective of this work was to evaluate seasonal variations in vegetative growth in the coffee plant (Coffea arabica L.), as well as their relationships with photoperiod, fruits removal, photosynthesis and stomatic resistance. The growth of the branches and leaf area decreased from the middle of March on, reaching the lowest rates in May and June, when lowest air temperatures were registered. This growth model was not modified neither by extending the photoperiod up to 14 hours, nor by the removal of the fruits, even though fruitless coffee plants exhibited higher growth rates for branches and leaf areas. No significant difference was observed in the potential photosynthesis depending on the presence of fruits, and the extension of the photoperiod did not affect photosynthetic rates. Potential photosynthetic rates do not explain the decreases in growth. The minimum air temperature was associated to declines in the growth. At 14h, the stomatic resistance assumed relatively high values during the period from the middle of March to the beginning of May, so coinciding with drastic fall in the branch growth and leaf area gain. The initial decline in the vegetative growth can be associated to temperatures around 14ºC. |
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Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesisCrescimento vegetativo sazonal do cafeeiro e sua relação com fotoperíodo, frutificação, resistência estomática e fotossínteseCoffea arabica; temperature; photosynthesis; curves of growthCoffea arabica; temperatura; curva de crescimentoThe objective of this work was to evaluate seasonal variations in vegetative growth in the coffee plant (Coffea arabica L.), as well as their relationships with photoperiod, fruits removal, photosynthesis and stomatic resistance. The growth of the branches and leaf area decreased from the middle of March on, reaching the lowest rates in May and June, when lowest air temperatures were registered. This growth model was not modified neither by extending the photoperiod up to 14 hours, nor by the removal of the fruits, even though fruitless coffee plants exhibited higher growth rates for branches and leaf areas. No significant difference was observed in the potential photosynthesis depending on the presence of fruits, and the extension of the photoperiod did not affect photosynthetic rates. Potential photosynthetic rates do not explain the decreases in growth. The minimum air temperature was associated to declines in the growth. At 14h, the stomatic resistance assumed relatively high values during the period from the middle of March to the beginning of May, so coinciding with drastic fall in the branch growth and leaf area gain. The initial decline in the vegetative growth can be associated to temperatures around 14ºC.O objetivo deste trabalho foi avaliar as flutuações sazonais do crescimento vegetativo do cafeeiro (Coffea arabica L.) e suas relações com o fotoperíodo, a remoção dos frutos, a fotossíntese e a resistência estomática. Os tratamentos foram constituídos por dois regimes fotoperiódicos – natural e estendido para 14 horas – em plantas com frutos e sem frutos. O crescimento de ramos e da área foliar decresceu a partir de meados de março, atingindo taxas mínimas nos meses de maio e junho, quando foram registradas as menores temperaturas. Esse modelo de crescimento não foi modificado pela extensão do fotoperíodo para 14 horas, nem pela remoção dos frutos, ainda que os cafeeiros sem frutos exibissem maiores taxas de crescimento dessas variáveis (ramo e área foliar). Não foi observada diferença significativa na fotossíntese potencial decorrente da presença de frutos, nem a extensão do fotoperíodo afetou taxas fotossintéticas. As taxas fotossintéticas potenciais não explicam os declínios do crescimento vegetativo, mas a temperatura mínima do ar correlacionou-se com as quedas do crescimento. A resistência estomática às 14h apresentou valores relativamente elevados, de meados de março a início de maio, coincidindo com elevadas quedas no crescimento de ramos e da área foliar. O declínio inicial no crescimento vegetativo pode estar associado a temperaturas em torno de 14ºC.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraAmaral, José Augusto Teixeira doRena, Alemar BragaAmaral, José Francisco Teixeira do2006-03-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/7145Pesquisa Agropecuaria Brasileira; v.41, n.3, mar. 2006; 377-384Pesquisa Agropecuária Brasileira; v.41, n.3, mar. 2006; 377-3841678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/7145/4190info:eu-repo/semantics/openAccess2014-09-26T17:43:19Zoai:ojs.seer.sct.embrapa.br:article/7145Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-26T17:43:19Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesis Crescimento vegetativo sazonal do cafeeiro e sua relação com fotoperíodo, frutificação, resistência estomática e fotossíntese |
title |
Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesis |
spellingShingle |
Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesis Amaral, José Augusto Teixeira do Coffea arabica; temperature; photosynthesis; curves of growth Coffea arabica; temperatura; curva de crescimento |
title_short |
Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesis |
title_full |
Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesis |
title_fullStr |
Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesis |
title_full_unstemmed |
Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesis |
title_sort |
Seasonal vegetative growth of the coffee plant and its relationship with the photoperiod, fructification, stomatic resistance and photosynthesis |
author |
Amaral, José Augusto Teixeira do |
author_facet |
Amaral, José Augusto Teixeira do Rena, Alemar Braga Amaral, José Francisco Teixeira do |
author_role |
author |
author2 |
Rena, Alemar Braga Amaral, José Francisco Teixeira do |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Amaral, José Augusto Teixeira do Rena, Alemar Braga Amaral, José Francisco Teixeira do |
dc.subject.por.fl_str_mv |
Coffea arabica; temperature; photosynthesis; curves of growth Coffea arabica; temperatura; curva de crescimento |
topic |
Coffea arabica; temperature; photosynthesis; curves of growth Coffea arabica; temperatura; curva de crescimento |
description |
The objective of this work was to evaluate seasonal variations in vegetative growth in the coffee plant (Coffea arabica L.), as well as their relationships with photoperiod, fruits removal, photosynthesis and stomatic resistance. The growth of the branches and leaf area decreased from the middle of March on, reaching the lowest rates in May and June, when lowest air temperatures were registered. This growth model was not modified neither by extending the photoperiod up to 14 hours, nor by the removal of the fruits, even though fruitless coffee plants exhibited higher growth rates for branches and leaf areas. No significant difference was observed in the potential photosynthesis depending on the presence of fruits, and the extension of the photoperiod did not affect photosynthetic rates. Potential photosynthetic rates do not explain the decreases in growth. The minimum air temperature was associated to declines in the growth. At 14h, the stomatic resistance assumed relatively high values during the period from the middle of March to the beginning of May, so coinciding with drastic fall in the branch growth and leaf area gain. The initial decline in the vegetative growth can be associated to temperatures around 14ºC. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-03-01 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/7145 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/7145 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/7145/4190 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.41, n.3, mar. 2006; 377-384 Pesquisa Agropecuária Brasileira; v.41, n.3, mar. 2006; 377-384 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416664178491392 |