| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Florestas. |
|
Data corrente: |
21/02/2019 |
|
Data da última atualização: |
21/02/2019 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
PIRES, P. P.; WENDLING, I.; SOUZA, A. M. de; COELHO, A. S. G. |
|
Afiliação: |
Patrícia Pereira Pires, Universidade Federal de Goiás; IVAR WENDLING, CNPF; Anderson Marcos de Souza, Universidade de Brasília; Alexandre Siqueira Guedes Coelho, Universidade Federal de Goiás. |
|
Título: |
Climatic oscillations in the production of Eucalyptus benthamii x E. dunnii shoots in mini-clonal hedge. |
|
Ano de publicação: |
2017 |
|
Fonte/Imprenta: |
Bosque, v. 38, n. 3, p. 487-493, 2017. |
|
DOI: |
10.4067/S0717-92002017000300006 |
|
Idioma: |
Inglês |
|
Conteúdo: |
Detailed knowledge on the factors influencing the production of minicuttings, especially focusing on management and environmental optimization is important. Therefore, this study aimed at evaluating the influence of temperature, relative humidity and PAR (photosynthetically active radiation) and their oscillations in mini-clonal hedges of three E. benthamii x E. dunnii hybrid clones regarding survival, vigor and productive capacity of ministumps. A mini-clonal hedge with a semi-hydroponic system was formed, with five replicates of five ministumps per clone, submitted to 41 successive collections of minicuttings during one year. A multiple linear regression model for minicutting production was adjusted according to maximum, average and minimum climatic variables, considering a period from 0 until 16 weeks before collection. Ministumps from three clones showed 100 % survival throughout the year. Clone 1 showed higher production (8,000 minicuttings m-2 month-1) and clone 3 showed the lowest values for this variable (less than 5,000 minicuttings m-2 month-1). The adjusted multiple linear regression model was formed by the maximum PAR, maximum humidity and temperature range of different weeks before collection. Maximum PAR (1,440-1,600 µmol m-² s-1) was the most influential variable in the adjusted model and positively related to minicutting productivity. Based on ideal climatic values found by the regression model, it is possible to suggest that climatic oscillations do not favor ministump development. MenosDetailed knowledge on the factors influencing the production of minicuttings, especially focusing on management and environmental optimization is important. Therefore, this study aimed at evaluating the influence of temperature, relative humidity and PAR (photosynthetically active radiation) and their oscillations in mini-clonal hedges of three E. benthamii x E. dunnii hybrid clones regarding survival, vigor and productive capacity of ministumps. A mini-clonal hedge with a semi-hydroponic system was formed, with five replicates of five ministumps per clone, submitted to 41 successive collections of minicuttings during one year. A multiple linear regression model for minicutting production was adjusted according to maximum, average and minimum climatic variables, considering a period from 0 until 16 weeks before collection. Ministumps from three clones showed 100 % survival throughout the year. Clone 1 showed higher production (8,000 minicuttings m-2 month-1) and clone 3 showed the lowest values for this variable (less than 5,000 minicuttings m-2 month-1). The adjusted multiple linear regression model was formed by the maximum PAR, maximum humidity and temperature range of different weeks before collection. Maximum PAR (1,440-1,600 µmol m-² s-1) was the most influential variable in the adjusted model and positively related to minicutting productivity. Based on ideal climatic values found by the regression model, it is possible to suggest that climatic oscillations do not favo... Mostrar Tudo |
|
Palavras-Chave: |
Minicutting; Miniestaquia. |
|
Thesagro: |
Clone; Eucalipto. |
|
Thesaurus Nal: |
Cloning (plants); Eucalyptus; Photosynthetically active radiation. |
|
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/193213/1/2017-Ivar-B-Climatic.pdf
|
|
Marc: |
LEADER 02277naa a2200253 a 4500
001 2106351
005 2019-02-21
008 2017 bl uuuu u00u1 u #d
024 7 $a10.4067/S0717-92002017000300006$2DOI
100 1 $aPIRES, P. P.
245 $aClimatic oscillations in the production of Eucalyptus benthamii x E. dunnii shoots in mini-clonal hedge.$h[electronic resource]
260 $c2017
520 $aDetailed knowledge on the factors influencing the production of minicuttings, especially focusing on management and environmental optimization is important. Therefore, this study aimed at evaluating the influence of temperature, relative humidity and PAR (photosynthetically active radiation) and their oscillations in mini-clonal hedges of three E. benthamii x E. dunnii hybrid clones regarding survival, vigor and productive capacity of ministumps. A mini-clonal hedge with a semi-hydroponic system was formed, with five replicates of five ministumps per clone, submitted to 41 successive collections of minicuttings during one year. A multiple linear regression model for minicutting production was adjusted according to maximum, average and minimum climatic variables, considering a period from 0 until 16 weeks before collection. Ministumps from three clones showed 100 % survival throughout the year. Clone 1 showed higher production (8,000 minicuttings m-2 month-1) and clone 3 showed the lowest values for this variable (less than 5,000 minicuttings m-2 month-1). The adjusted multiple linear regression model was formed by the maximum PAR, maximum humidity and temperature range of different weeks before collection. Maximum PAR (1,440-1,600 µmol m-² s-1) was the most influential variable in the adjusted model and positively related to minicutting productivity. Based on ideal climatic values found by the regression model, it is possible to suggest that climatic oscillations do not favor ministump development.
650 $aCloning (plants)
650 $aEucalyptus
650 $aPhotosynthetically active radiation
650 $aClone
650 $aEucalipto
653 $aMinicutting
653 $aMiniestaquia
700 1 $aWENDLING, I.
700 1 $aSOUZA, A. M. de
700 1 $aCOELHO, A. S. G.
773 $tBosque$gv. 38, n. 3, p. 487-493, 2017.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Florestas (CNPF) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Meio Ambiente. |
|
Data corrente: |
21/01/2016 |
|
Data da última atualização: |
02/03/2017 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 1 |
|
Autoria: |
DaMATTA, F. M.; GODOY, A. G.; MENEZES-SILVA, P. E.; MARTINS, S. C. V.; SANGLARD, L. M. V. P.; MORAIS, L. E.; TORRE NETO, A.; GHINI, R. |
|
Afiliação: |
FABIO MURILO DAMATTA, UFV; ALICE GONTIJO DE GODOY, UFV; PAULO EDUARDO DE MENEZES SILVA, UFV; SAMUEL CORDEIRO VITOR MARTINS, UFV; LILIAN MARIA VINCIS PEREIRA SANGLARD, UFV; LEANDRO ELIAS MORAIS, UFV; ANDRE TORRE NETO, CNPDIA; RAQUEL GHINI, CNPMA. |
|
Título: |
Sustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions: disentangling the contributions of stomatal, mesophyll, and biochemical limitations. |
|
Ano de publicação: |
2016 |
|
Fonte/Imprenta: |
Journal of Experimental Botany, London, v. 67, n. 1, p. 341-352, 2016. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Abstract: Coffee (Coffea spp.), a globally traded commodity, is a slow-growing tropical tree species that displays an improved photosynthetic performance when grown under elevated atmospheric CO2 concentrations ([CO2]). To investigate the mechanisms underlying this response, two commercial coffee cultivars (Catuaí and Obatã) were grown using the first free-air CO2 enrichment (FACE) facility in Latin America. Measurements were conducted in two contrasting growth seasons, which were characterized by the high (February) and low (August) sink demand. Elevated [CO2] led to increases in net photosynthetic rates (A) in parallel with decreased photorespiration rates, with no photochemical limitations to A. The stimulation of A by elevated CO2 supply was more prominent in August (56% on average) than in February (40% on average). Overall, the stomatal and mesophyll conductances, as well as the leaf nitrogen and phosphorus concentrations, were unresponsive to the treatments. Photosynthesis was strongly limited by diffusional constraints, particularly at the stomata level, and this pattern was little, if at all, affected by elevated [CO2]. Relative to February, starch pools (but not soluble sugars) increased remarkably (>500%) in August, with no detectable alteration in the maximum carboxylation capacity estimated on a chloroplast [CO2] basis. Upregulation of A by elevated [CO2] took place with no signs of photosynthetic downregulation, even during the period of low sink demand, when acclimation would be expected to be greatest. MenosAbstract: Coffee (Coffea spp.), a globally traded commodity, is a slow-growing tropical tree species that displays an improved photosynthetic performance when grown under elevated atmospheric CO2 concentrations ([CO2]). To investigate the mechanisms underlying this response, two commercial coffee cultivars (Catuaí and Obatã) were grown using the first free-air CO2 enrichment (FACE) facility in Latin America. Measurements were conducted in two contrasting growth seasons, which were characterized by the high (February) and low (August) sink demand. Elevated [CO2] led to increases in net photosynthetic rates (A) in parallel with decreased photorespiration rates, with no photochemical limitations to A. The stimulation of A by elevated CO2 supply was more prominent in August (56% on average) than in February (40% on average). Overall, the stomatal and mesophyll conductances, as well as the leaf nitrogen and phosphorus concentrations, were unresponsive to the treatments. Photosynthesis was strongly limited by diffusional constraints, particularly at the stomata level, and this pattern was little, if at all, affected by elevated [CO2]. Relative to February, starch pools (but not soluble sugars) increased remarkably (>500%) in August, with no detectable alteration in the maximum carboxylation capacity estimated on a chloroplast [CO2] basis. Upregulation of A by elevated [CO2] took place with no signs of photosynthetic downregulation, even during the period of low sink demand, when a... Mostrar Tudo |
|
Palavras-Chave: |
Coffea arabica L; Photosynthetic acclimation; Photosynthetic limitations; Startch. |
|
Thesagro: |
Café; Clima; Dióxido de carbono; Fotossíntese; Mudança Climática. |
|
Thesaurus NAL: |
carbohydrates; Carbon dioxide; Climate change; face; nitrogen; Photosynthesis; starch. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02759naa a2200397 a 4500
001 2034744
005 2017-03-02
008 2016 bl --- 0-- u #d
100 1 $aDaMATTA, F. M.
245 $aSustained enhancement of photosynthesis in coffee trees grown under free-air CO2 enrichment conditions$bdisentangling the contributions of stomatal, mesophyll, and biochemical limitations.$h[electronic resource]
260 $c2016
520 $aAbstract: Coffee (Coffea spp.), a globally traded commodity, is a slow-growing tropical tree species that displays an improved photosynthetic performance when grown under elevated atmospheric CO2 concentrations ([CO2]). To investigate the mechanisms underlying this response, two commercial coffee cultivars (Catuaí and Obatã) were grown using the first free-air CO2 enrichment (FACE) facility in Latin America. Measurements were conducted in two contrasting growth seasons, which were characterized by the high (February) and low (August) sink demand. Elevated [CO2] led to increases in net photosynthetic rates (A) in parallel with decreased photorespiration rates, with no photochemical limitations to A. The stimulation of A by elevated CO2 supply was more prominent in August (56% on average) than in February (40% on average). Overall, the stomatal and mesophyll conductances, as well as the leaf nitrogen and phosphorus concentrations, were unresponsive to the treatments. Photosynthesis was strongly limited by diffusional constraints, particularly at the stomata level, and this pattern was little, if at all, affected by elevated [CO2]. Relative to February, starch pools (but not soluble sugars) increased remarkably (>500%) in August, with no detectable alteration in the maximum carboxylation capacity estimated on a chloroplast [CO2] basis. Upregulation of A by elevated [CO2] took place with no signs of photosynthetic downregulation, even during the period of low sink demand, when acclimation would be expected to be greatest.
650 $acarbohydrates
650 $aCarbon dioxide
650 $aClimate change
650 $aface
650 $anitrogen
650 $aPhotosynthesis
650 $astarch
650 $aCafé
650 $aClima
650 $aDióxido de carbono
650 $aFotossíntese
650 $aMudança Climática
653 $aCoffea arabica L
653 $aPhotosynthetic acclimation
653 $aPhotosynthetic limitations
653 $aStartch
700 1 $aGODOY, A. G.
700 1 $aMENEZES-SILVA, P. E.
700 1 $aMARTINS, S. C. V.
700 1 $aSANGLARD, L. M. V. P.
700 1 $aMORAIS, L. E.
700 1 $aTORRE NETO, A.
700 1 $aGHINI, R.
773 $tJournal of Experimental Botany, London$gv. 67, n. 1, p. 341-352, 2016.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Meio Ambiente (CNPMA) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
