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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
18/12/2009 |
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Data da última atualização: |
17/11/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ARAGÃO, D. V.; FORTINI, L. B.; MULKEY, S. S.; ZARIN, D. J.; ARAUJO, M. M.; CARVALHO, C. J. R. de. |
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Afiliação: |
DEBORA VEIGA ARAGÃO, UFRA; CLAUDIO JOSE REIS DE CARVALHO, CPATU. |
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Título: |
Correlation but no causation between leaf nitrogen and maximum assimilation: the role of drought and reproduction in gas exchange in an understory tropical plant Miconia ciliata (Melastomataceae). |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
American Journal of Botany, v. 92, n. 3, p. 456-461, Mar. 2005. |
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DOI: |
10.3732/ajb.92.3.456 |
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Idioma: |
Inglês |
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Conteúdo: |
Alternative hypotheses were tested to explain a previously reported anomaly in the response of leaf photosynthetic capacity at light saturation (A..) in Miconia ciliata to dry-season irrigation. The anomaly is characterized by an abrupt increase in leaf A._ for nonirrigated plants at the onset of the rainy season to values that significantly exceeded corresponding measurements for plants that were irrigated during the previous dry season. Hypothesis I posits that a pulse in leaf nitrogen increases CO2 assimilation in nonirrigated plants at the onset of the wet season and is dampened for irrigated plants; this hypothesis was rejected because, although a wet-season nitrogen pulse did occur, it was identical for both irrigated and nonirrigated plants and was preceded by the increase in assimilation by nonirrigated plants. Hypothesis 2 posits that a reproduction-related, compensatory photosynthetic response occurs in nonirrigated plants following the onset of the wet season and is dampened in irrigated plants; consistent with hypothesis 2, high maximum assimilation rates for control plants in the wet season were significantly correlated with fruiting and flowering, whereas irrigation caused flowering and fruiting in the dry season, spreading M. ciliata reproductive activity in irrigated plants across the entire year. |
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Palavras-Chave: |
Amazon; Compensatory photosynthesis; Drought seasonality; Reprodutive phenology; Secondary forest. |
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Thesaurus Nal: |
nitrogen content. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/96241/1/456.full.pdf
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Marc: |
LEADER 02248naa a2200265 a 4500
001 1578363
005 2022-11-17
008 2005 bl uuuu u00u1 u #d
024 7 $a10.3732/ajb.92.3.456$2DOI
100 1 $aARAGÃO, D. V.
245 $aCorrelation but no causation between leaf nitrogen and maximum assimilation$bthe role of drought and reproduction in gas exchange in an understory tropical plant Miconia ciliata (Melastomataceae).$h[electronic resource]
260 $c2005
520 $aAlternative hypotheses were tested to explain a previously reported anomaly in the response of leaf photosynthetic capacity at light saturation (A..) in Miconia ciliata to dry-season irrigation. The anomaly is characterized by an abrupt increase in leaf A._ for nonirrigated plants at the onset of the rainy season to values that significantly exceeded corresponding measurements for plants that were irrigated during the previous dry season. Hypothesis I posits that a pulse in leaf nitrogen increases CO2 assimilation in nonirrigated plants at the onset of the wet season and is dampened for irrigated plants; this hypothesis was rejected because, although a wet-season nitrogen pulse did occur, it was identical for both irrigated and nonirrigated plants and was preceded by the increase in assimilation by nonirrigated plants. Hypothesis 2 posits that a reproduction-related, compensatory photosynthetic response occurs in nonirrigated plants following the onset of the wet season and is dampened in irrigated plants; consistent with hypothesis 2, high maximum assimilation rates for control plants in the wet season were significantly correlated with fruiting and flowering, whereas irrigation caused flowering and fruiting in the dry season, spreading M. ciliata reproductive activity in irrigated plants across the entire year.
650 $anitrogen content
653 $aAmazon
653 $aCompensatory photosynthesis
653 $aDrought seasonality
653 $aReprodutive phenology
653 $aSecondary forest
700 1 $aFORTINI, L. B.
700 1 $aMULKEY, S. S.
700 1 $aZARIN, D. J.
700 1 $aARAUJO, M. M.
700 1 $aCARVALHO, C. J. R. de
773 $tAmerican Journal of Botany$gv. 92, n. 3, p. 456-461, Mar. 2005.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
15/04/2010 |
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Data da última atualização: |
03/01/2013 |
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Tipo da produção científica: |
Boletim de Pesquisa e Desenvolvimento |
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Autoria: |
CAMARÃO, A. P.; RODRIGUES FILHO, J. A.; CARVALHO, C. J. R. de; FONTENELLE, D. S. |
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Afiliação: |
ARI PINHEIRO CAMARÃO, PESQUISADOR APOSENTADO CPATU; JOSE ADERITO RODRIGUES FILHO, CPATU; CLAUDIO JOSE REIS DE CARVALHO, CPATU; DANIELLE SANTOS FONTENELLE, SERVIÇO NACIONAL DE APRENDIZAGEM RURAL. |
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Título: |
Composição química de espécies herbáceas e arbustivas da vegetação secundária consumida por bovinos em pastagens cultivadas no Nordeste paraense. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Belém, PA: Embrapa Amazônia Oriental, 2009. |
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Páginas: |
24 p. |
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Série: |
(Embrapa Amazônia Oriental. Boletim de pesquisa e desenvolvimento, 71). |
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Idioma: |
Português |
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Notas: |
Disponível também on-line. |
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Palavras-Chave: |
Brasil; Pará. |
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Thesagro: |
Alimento; Bovinocultura; Nutrição animal; Vegetação secundária. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/27852/1/BPD-71.pdf
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Marc: |
LEADER 00851nam a2200253 a 4500
001 1664483
005 2013-01-03
008 2009 bl uuuu u0uu1 u #d
100 1 $aCAMARÃO, A. P.
245 $aComposição química de espécies herbáceas e arbustivas da vegetação secundária consumida por bovinos em pastagens cultivadas no Nordeste paraense.
260 $aBelém, PA: Embrapa Amazônia Oriental$c2009
300 $a24 p.
490 $a(Embrapa Amazônia Oriental. Boletim de pesquisa e desenvolvimento, 71).
500 $aDisponível também on-line.
650 $aAmazonia
650 $aAlimento
650 $aBovinocultura
650 $aNutrição animal
650 $aVegetação secundária
653 $aBrasil
653 $aPará
700 1 $aRODRIGUES FILHO, J. A.
700 1 $aCARVALHO, C. J. R. de
700 1 $aFONTENELLE, D. S.
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Embrapa Amazônia Oriental (CPATU) |
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