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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
11/05/2001 |
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Data da última atualização: |
21/11/2018 |
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Autoria: |
PAIVA, E. A. S. e; MORAIS, H. C. de; ISAIAS, R. M. dos S.; ROCHA, D. M. S. de; OLIVEIRA, P. E. |
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Afiliação: |
Élder Antônio Sousa e Paiva, Universidade Federal de Minas Gerais - UFMG/Departamento de Botânica; Helena Castanheira de Morais, Universidade de Brasília - UnB/Departamento de Ecologia; Rosy Mary dos Santos Isaias, Universidade Federal de Minas Gerais - UFMG/Departamento de Botânica; Dulce Maria Sucena da Rocha, Universidade de Brasília - UnB/Departamento de Ecologia; Paulo Eugênio Oliveira, Universidade Federal de Uberlândia - UFU Departamento de Biociências. |
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Título: |
Ocurrence and structure of extrafloral nectaries in Pterodon pubescens Benth. and Pterodon polygalaeflorus Benth. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 36, n. 2, p. 219-224, fev. 2001 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Ocorrência e estrutura de nectários extraflorais em Pterodon pubescens Benth. e em Pterodon polygalaeflorus Benth. |
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Conteúdo: |
Extrafloral nectaries (EFNs) are structurally variable and widely spread among the angiosperms. The occurrence of EFNs in leaves of Pterodon polygalaeflorus Benth. and Pterodon pubescens Benth. (Fabaceae: Papilionoideae) were detected in adult specimens, at the time of production of new buds and flowers. The goals of the present study are to register the occurrence of the EFNs in P. pubescens and P. polygalaeflorus, and provide comparative data on the anatomical structures. The EFNs occur in the rachis and are located under the insertion of each petiolule. Each nectary consists of a small elevation whose apical portion is deeply invaginated, resulting in a depression (secretory pole), a common characteristic of both species. Unicellular, non-glandular trichomes occur along the rachis, being less numerous in P. polygalaeflorus while in P. pubescens they cover the EFNs. The secretory tissue consists of parenchyma cells with dense cytoplasm compactly arranged. The nectar reaches the surface of the EFNs by rupturing the thin cuticle which covers the secretory pole, since both species lack stomata or any other interruption at the epidermis. The basic difference between the two species, in relation to the EFNs, is the density of the pubescence, which is always greater in P. pubescens. Structural and dimensional modifications may be observed, even between basal and apical nectaries in the same rachis, so it does not constitute a taxonomical tool. |
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Palavras-Chave: |
Nectarios; Plant animal relations; Plant secretions; Proteção das plantas; Relação planta-animal; Secreção vegetal. |
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Thesagro: |
Anatomia Vegetal; Animal Herbívoro; Néctar. |
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Thesaurus Nal: |
Herbivores; Nectaries; Plant anatomy; Plant protection. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/18929/1/pab99_174.pdf
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Marc: |
LEADER 02600naa a2200337 a 4500
001 1103660
005 2018-11-21
008 2001 bl uuuu u00u1 u #d
100 1 $aPAIVA, E. A. S. e
245 $aOcurrence and structure of extrafloral nectaries in Pterodon pubescens Benth. and Pterodon polygalaeflorus Benth.
260 $c2001
500 $aTítulo em português: Ocorrência e estrutura de nectários extraflorais em Pterodon pubescens Benth. e em Pterodon polygalaeflorus Benth.
520 $aExtrafloral nectaries (EFNs) are structurally variable and widely spread among the angiosperms. The occurrence of EFNs in leaves of Pterodon polygalaeflorus Benth. and Pterodon pubescens Benth. (Fabaceae: Papilionoideae) were detected in adult specimens, at the time of production of new buds and flowers. The goals of the present study are to register the occurrence of the EFNs in P. pubescens and P. polygalaeflorus, and provide comparative data on the anatomical structures. The EFNs occur in the rachis and are located under the insertion of each petiolule. Each nectary consists of a small elevation whose apical portion is deeply invaginated, resulting in a depression (secretory pole), a common characteristic of both species. Unicellular, non-glandular trichomes occur along the rachis, being less numerous in P. polygalaeflorus while in P. pubescens they cover the EFNs. The secretory tissue consists of parenchyma cells with dense cytoplasm compactly arranged. The nectar reaches the surface of the EFNs by rupturing the thin cuticle which covers the secretory pole, since both species lack stomata or any other interruption at the epidermis. The basic difference between the two species, in relation to the EFNs, is the density of the pubescence, which is always greater in P. pubescens. Structural and dimensional modifications may be observed, even between basal and apical nectaries in the same rachis, so it does not constitute a taxonomical tool.
650 $aHerbivores
650 $aNectaries
650 $aPlant anatomy
650 $aPlant protection
650 $aAnatomia Vegetal
650 $aAnimal Herbívoro
650 $aNéctar
653 $aNectarios
653 $aPlant animal relations
653 $aPlant secretions
653 $aProteção das plantas
653 $aRelação planta-animal
653 $aSecreção vegetal
700 1 $aMORAIS, H. C. de
700 1 $aISAIAS, R. M. dos S.
700 1 $aROCHA, D. M. S. de
700 1 $aOLIVEIRA, P. E.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 36, n. 2, p. 219-224, fev. 2001
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
12/12/2023 |
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Data da última atualização: |
12/12/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SOLANDER, K. C.; NEWMAN, B. D.; ARAUJO, A. C. de; BARNARD, H. R.; BERRY, Z. C.; BONAL, D.; BRETFELD, M.; BURBAN, B.; CANDIDO, L. A.; CÉLLERI, R.; CHAMBERS, J. Q.; CHRISTOFFERSEN, B. O.; DETTO, M.; DORIGO, W. A.; EWERS, B. E.; FERREIRA, S. J. F.; KNOHL, A.; LEUNG, L. R.; McDOWELL, N. G.; MILLER, G. R.; MONTEIRO, M. T. F.; MOORE, G. W.; NEGRON-JUAREZ, R.; SALESKA, S. R.; STIEGLER, C.; TOMASELLA, J.; XU, C. |
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Afiliação: |
KURT C. SOLANDER, LOS ALAMOS NATIONAL LABORATOR; BRENT D. NEWMAN, LOS ALAMOS NATIONAL LABORATORY; ALESSANDRO CARIOCA DE ARAUJO, CPATU; HOLLY R. BARNARD, UNIVERSITY OF COLORADO BOULDER; Z. CARTER BERRY, CHAPMAN UNIVERSITY; DAMIEN BONAL, INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE; MARIO BRETFELD, KENNESAW STATE UNIVERSITY; BENOIT BURBAN, INSTITUT NATIONAL DE RECHERCHE EN AGRICULTURE; LUIZ ANTONIO CANDIDO, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; ROLANDO CÉLLERI, UNIVERSIDAD DE CUENCA; JEFFERY Q. CHAMBERS, LAWRENCE BERKELEY NATIONAL LABORATORY; BRADLEY O. CHRISTOFFERSEN, UNIVERSITY OF TEXAS; MATTEO DETTO, PRINCETON UNIVERSITY; WOUTER A. DORIGO, TECHNISCHEN UNIVERSITÄT WIEN; BRENT E. EWERS, UNIVERSITY OF WYOMING; SAVIO JOSÉ FILGUEIRAS FERREIRA, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; ALEXANDER KNOHL, UNIVERSITY OF GÖTTINGEN; L. RUBY LEUNG, PACIFIC NORTHWEST NATIONAL LABORATORY; NATE G. MCDOWELL, PACIFIC NORTHWEST NATIONAL LABORATORY; GRETCHEN R. MILLER, TEXAS A&M UNIVERSITY; MARIA TEREZINHA FERREIRA MONTEIRO, INSTITUTO NACIONAL DE PESQUISAS DA AMAZÔNIA; GEORGIANNE W. MOORE, TEXAS A&M UNIVERSITY; ROBINSON NEGRON-JUAREZ, LAWRENCE BERKELEY NATIONAL LABORATORY; SCOTT R. SALESKA, UNIVERSITY OF ARIZONA; CHRISTIAN STIEGLER, UNIVERSITY OF GÖTTINGEN; JAVIER TOMASELLA, CENTRO NACIONAL DE MONITORAMENTO E ALERTA DE DESASTRES NATURAIS; CHONGGANG XU, LOS ALAMOS NATIONAL LABORATORY. |
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Título: |
The pantropical response of soil moisture to El Niño. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Hydrology and Earth System Sciences, v. 24, n. 5, p. 2303-2322, 2020. |
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DOI: |
https://doi.org/10.5194/hess-24-2303-2020 |
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Idioma: |
Inglês |
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Conteúdo: |
The 2015–2016 El Niño event ranks as one of the most severe on record in terms of the magnitude and extent of sea surface temperature (SST) anomalies generated in the tropical Pacific Ocean. Corresponding global impacts on the climate were expected to rival, or even surpass, those of the 1997–1998 severe El Niño event, which had SST anomalies that were similar in size. However, the 2015–2016 event failed to meet expectations for hydrologic change in many areas, including those expected to receive well above normal precipitation. To better understand how climate anomalies during an El Niño event impact soil moisture, we investigate changes in soil moisture in the humid tropics (between ± 25◦) during the three most recent super El Niño events of 1982–1983, 1997–1998 and 2015–2016, using data from the Global Land Data Assimilation System (GLDAS). First, we use in situ soil moisture observations obtained from 16 sites across five continents to validate and bias-correct estimates from GLDAS (r2 = 0.54). Next, we apply a k-means cluster analysis to the soil moisture estimates during the El Niño mature phase, resulting in four groups of clustered data. The strongest and most consistent decreases in soil moisture occur in the Amazon basin and maritime southeastern Asia, while the most consistent increases occur over eastern Africa. In addition, we compare changes in soil moisture to both precipitation and evapotranspiration, which showed a lack of agreement in the direction of change between these variables and soil moisture most prominently in the southern Amazon basin, the Sahel and mainland southeastern Asia. Our results can be used to improve estimates of spatiotemporal differences in El Niño impacts on soil moisture in tropical hydrology and ecosystem models at multiple scales. MenosThe 2015–2016 El Niño event ranks as one of the most severe on record in terms of the magnitude and extent of sea surface temperature (SST) anomalies generated in the tropical Pacific Ocean. Corresponding global impacts on the climate were expected to rival, or even surpass, those of the 1997–1998 severe El Niño event, which had SST anomalies that were similar in size. However, the 2015–2016 event failed to meet expectations for hydrologic change in many areas, including those expected to receive well above normal precipitation. To better understand how climate anomalies during an El Niño event impact soil moisture, we investigate changes in soil moisture in the humid tropics (between ± 25◦) during the three most recent super El Niño events of 1982–1983, 1997–1998 and 2015–2016, using data from the Global Land Data Assimilation System (GLDAS). First, we use in situ soil moisture observations obtained from 16 sites across five continents to validate and bias-correct estimates from GLDAS (r2 = 0.54). Next, we apply a k-means cluster analysis to the soil moisture estimates during the El Niño mature phase, resulting in four groups of clustered data. The strongest and most consistent decreases in soil moisture occur in the Amazon basin and maritime southeastern Asia, while the most consistent increases occur over eastern Africa. In addition, we compare changes in soil moisture to both precipitation and evapotranspiration, which showed a lack of agreement in the direction of chang... Mostrar Tudo |
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Palavras-Chave: |
Soil moisture. |
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Thesagro: |
Clima; Mudança Climática; Umidade do Solo. |
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Thesaurus NAL: |
El Nino. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1159556/1/The-pantropical.pdf
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Marc: |
LEADER 03188naa a2200505 a 4500
001 2159556
005 2023-12-12
008 2020 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.5194/hess-24-2303-2020$2DOI
100 1 $aSOLANDER, K. C.
245 $aThe pantropical response of soil moisture to El Niño.$h[electronic resource]
260 $c2020
520 $aThe 2015–2016 El Niño event ranks as one of the most severe on record in terms of the magnitude and extent of sea surface temperature (SST) anomalies generated in the tropical Pacific Ocean. Corresponding global impacts on the climate were expected to rival, or even surpass, those of the 1997–1998 severe El Niño event, which had SST anomalies that were similar in size. However, the 2015–2016 event failed to meet expectations for hydrologic change in many areas, including those expected to receive well above normal precipitation. To better understand how climate anomalies during an El Niño event impact soil moisture, we investigate changes in soil moisture in the humid tropics (between ± 25◦) during the three most recent super El Niño events of 1982–1983, 1997–1998 and 2015–2016, using data from the Global Land Data Assimilation System (GLDAS). First, we use in situ soil moisture observations obtained from 16 sites across five continents to validate and bias-correct estimates from GLDAS (r2 = 0.54). Next, we apply a k-means cluster analysis to the soil moisture estimates during the El Niño mature phase, resulting in four groups of clustered data. The strongest and most consistent decreases in soil moisture occur in the Amazon basin and maritime southeastern Asia, while the most consistent increases occur over eastern Africa. In addition, we compare changes in soil moisture to both precipitation and evapotranspiration, which showed a lack of agreement in the direction of change between these variables and soil moisture most prominently in the southern Amazon basin, the Sahel and mainland southeastern Asia. Our results can be used to improve estimates of spatiotemporal differences in El Niño impacts on soil moisture in tropical hydrology and ecosystem models at multiple scales.
650 $aEl Nino
650 $aClima
650 $aMudança Climática
650 $aUmidade do Solo
653 $aSoil moisture
700 1 $aNEWMAN, B. D.
700 1 $aARAUJO, A. C. de
700 1 $aBARNARD, H. R.
700 1 $aBERRY, Z. C.
700 1 $aBONAL, D.
700 1 $aBRETFELD, M.
700 1 $aBURBAN, B.
700 1 $aCANDIDO, L. A.
700 1 $aCÉLLERI, R.
700 1 $aCHAMBERS, J. Q.
700 1 $aCHRISTOFFERSEN, B. O.
700 1 $aDETTO, M.
700 1 $aDORIGO, W. A.
700 1 $aEWERS, B. E.
700 1 $aFERREIRA, S. J. F.
700 1 $aKNOHL, A.
700 1 $aLEUNG, L. R.
700 1 $aMcDOWELL, N. G.
700 1 $aMILLER, G. R.
700 1 $aMONTEIRO, M. T. F.
700 1 $aMOORE, G. W.
700 1 $aNEGRON-JUAREZ, R.
700 1 $aSALESKA, S. R.
700 1 $aSTIEGLER, C.
700 1 $aTOMASELLA, J.
700 1 $aXU, C.
773 $tHydrology and Earth System Sciences$gv. 24, n. 5, p. 2303-2322, 2020.
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Embrapa Amazônia Oriental (CPATU) |
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