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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
21/10/2008 |
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Data da última atualização: |
21/10/2008 |
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Autoria: |
OLIVEIRA, L. M. de; DAVIDE, A. C.; CARVALHO, M. L. M. de. |
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Título: |
Teste de germinação de sementes de Peltophorum dubium (Sprengel) Taubert - Fabaceae. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Floresta, Curitiba, v. 38, n. 3, p. 545-551, jul./set. 2008. |
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Idioma: |
Português |
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Conteúdo: |
Para avaliar a influência de diferentes temperaturas e substratos na realização do teste de germinação
em sementes de canafístula, foram testadas as temperaturas de 25 °C, 20?30 °C e 30 °C, e os
substratos areia (sobre areia) e papel (sobre papel e rolo). O experimento foi realizado em
delineamento inteiramente casualizado, em esquema fatorial. Os três lotes utilizados foram colhidos
nos municípios de Lavras (MG) e Lins (SP) em diferentes anos de coleta e armazenados em câmara
com controle de temperatura e umidade. As sementes foram submetidas a tratamento para quebra da
dormência, com imersão em água quente (95 °C) e repouso na mesma água, fora do aquecimento, por
24 horas. A temperatura de 30 °C e o substrato papel, na forma de rolo, proporcionaram maior
porcentagem e velocidade de germinação de sementes de canafístula.
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Thesagro: |
Análise; Canafístula; Semente. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01375naa a2200181 a 4500
001 1315153
005 2008-10-21
008 2008 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, L. M. de
245 $aTeste de germinação de sementes de Peltophorum dubium (Sprengel) Taubert - Fabaceae.
260 $c2008
520 $aPara avaliar a influência de diferentes temperaturas e substratos na realização do teste de germinação em sementes de canafístula, foram testadas as temperaturas de 25 °C, 20?30 °C e 30 °C, e os substratos areia (sobre areia) e papel (sobre papel e rolo). O experimento foi realizado em delineamento inteiramente casualizado, em esquema fatorial. Os três lotes utilizados foram colhidos nos municípios de Lavras (MG) e Lins (SP) em diferentes anos de coleta e armazenados em câmara com controle de temperatura e umidade. As sementes foram submetidas a tratamento para quebra da dormência, com imersão em água quente (95 °C) e repouso na mesma água, fora do aquecimento, por 24 horas. A temperatura de 30 °C e o substrato papel, na forma de rolo, proporcionaram maior porcentagem e velocidade de germinação de sementes de canafístula.
650 $aAnálise
650 $aCanafístula
650 $aSemente
700 1 $aDAVIDE, A. C.
700 1 $aCARVALHO, M. L. M. de
773 $tFloresta, Curitiba$gv. 38, n. 3, p. 545-551, jul./set. 2008.
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Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
19/02/2024 |
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Data da última atualização: |
03/05/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
AGUIAR, N. S. de; GABIRA, M. M.; DUARTE, M. M.; TOMASI, J. de C.; HANSEL, F. A.; LAVORANTI, O. J.; DESCHAMPS, C.; HELM, C. V.; WENDLING, I. |
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Afiliação: |
NATALIA SAUDADE DE AGUIAR, UNIVERSIDADE FEDERAL DO PARANÁ; MÔNICA MORENO GABIRA, UNIVERSIDADE FEDERAL DO PARANÁ; MANOELA MENDES DUARTE, BOLSISTA NA EMBRAPA FLORESTAS; JÉSSICA DE CÁSSIA TOMASI, UNIVERSIDADE FEDERAL DO PARANÁ; FABRICIO AUGUSTO HANSEL, CNPF; OSMIR JOSE LAVORANTI, CNPF; CICERO DESCHAMPS, UNIVERSIDADE FEDERAL DO PARANÁ; CRISTIANE VIEIRA HELM, CNPF; IVAR WENDLING, CNPF. |
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Título: |
How shading levels affect bioactive compounds in leaves of yerba mate clones. |
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Ano de publicação: |
2024 |
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Fonte/Imprenta: |
Biochemical Systematics and Ecology, v. 113, 104796, 2024. |
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DOI: |
https://doi.org/10.1016/j.bse.2024.104796 |
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Idioma: |
Inglês |
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Conteúdo: |
Shading is one of the factors that influences the production of bioactive compounds in yerba mate leaves (Ilex paraguariensis). In this study, we simulated different shading levels in a new yerba mate cultivation system, semi-hydroponic inside a greenhouse. We evaluated how five levels of artificial shading influence on the bioactive compounds methylxanthines and caffeoylquinic acids (CQAs) in young and mature leaves of two yerba mate clones (EC22 and EC40) grown in a semi-hydroponic system over six harvests. From the aqueous extract, we determined the contents of methylxanthines and CQAs on an Ultra-Fast Liquid Chromatograph (UFLC), and the annual productivity of compounds per productive area was calculated considering leaf mass production m−2. There was a higher influence of clone and leaf type on the levels of bioactive compounds, especially methylxanthines – young leaves and EC40 clone showed higher caffeine content. The clones responded differently to shading: higher shading levels favor caffeine accumulation in the EC40 clone; and in the EC22 clone the absence of shading increased theobromine content. Despite the different effects of shading on each compound and clone, there is a reduction in the annual productivity of all bioactive compounds with increasing shading due to the low leaf mass productivity. Thus, we do not recommend shading in the yerba mate semi-hydroponic cultivation. This cultivation system guarantees high productivity of bioactive compounds, especially CQAs. Our study demonstrates yerba mate chemical potential to generate numerous products, including industrial extraction of methylxanthines and CQAs, increasing the commercial value of the species. MenosShading is one of the factors that influences the production of bioactive compounds in yerba mate leaves (Ilex paraguariensis). In this study, we simulated different shading levels in a new yerba mate cultivation system, semi-hydroponic inside a greenhouse. We evaluated how five levels of artificial shading influence on the bioactive compounds methylxanthines and caffeoylquinic acids (CQAs) in young and mature leaves of two yerba mate clones (EC22 and EC40) grown in a semi-hydroponic system over six harvests. From the aqueous extract, we determined the contents of methylxanthines and CQAs on an Ultra-Fast Liquid Chromatograph (UFLC), and the annual productivity of compounds per productive area was calculated considering leaf mass production m−2. There was a higher influence of clone and leaf type on the levels of bioactive compounds, especially methylxanthines – young leaves and EC40 clone showed higher caffeine content. The clones responded differently to shading: higher shading levels favor caffeine accumulation in the EC40 clone; and in the EC22 clone the absence of shading increased theobromine content. Despite the different effects of shading on each compound and clone, there is a reduction in the annual productivity of all bioactive compounds with increasing shading due to the low leaf mass productivity. Thus, we do not recommend shading in the yerba mate semi-hydroponic cultivation. This cultivation system guarantees high productivity of bioactive compounds, especiall... Mostrar Tudo |
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Palavras-Chave: |
Ácidos cafeoilquínicos; Caffeoylquinic acids; Incidência de luz; Light incidence; Metabólitos secundários; Methylxanthines; Metilxantinas. |
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Thesagro: |
Clone; Ilex Paraguariensis. |
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Thesaurus NAL: |
Clones; Secondary metabolites. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 02762naa a2200361 a 4500
001 2162089
005 2024-05-03
008 2024 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.bse.2024.104796$2DOI
100 1 $aAGUIAR, N. S. de
245 $aHow shading levels affect bioactive compounds in leaves of yerba mate clones.$h[electronic resource]
260 $c2024
520 $aShading is one of the factors that influences the production of bioactive compounds in yerba mate leaves (Ilex paraguariensis). In this study, we simulated different shading levels in a new yerba mate cultivation system, semi-hydroponic inside a greenhouse. We evaluated how five levels of artificial shading influence on the bioactive compounds methylxanthines and caffeoylquinic acids (CQAs) in young and mature leaves of two yerba mate clones (EC22 and EC40) grown in a semi-hydroponic system over six harvests. From the aqueous extract, we determined the contents of methylxanthines and CQAs on an Ultra-Fast Liquid Chromatograph (UFLC), and the annual productivity of compounds per productive area was calculated considering leaf mass production m−2. There was a higher influence of clone and leaf type on the levels of bioactive compounds, especially methylxanthines – young leaves and EC40 clone showed higher caffeine content. The clones responded differently to shading: higher shading levels favor caffeine accumulation in the EC40 clone; and in the EC22 clone the absence of shading increased theobromine content. Despite the different effects of shading on each compound and clone, there is a reduction in the annual productivity of all bioactive compounds with increasing shading due to the low leaf mass productivity. Thus, we do not recommend shading in the yerba mate semi-hydroponic cultivation. This cultivation system guarantees high productivity of bioactive compounds, especially CQAs. Our study demonstrates yerba mate chemical potential to generate numerous products, including industrial extraction of methylxanthines and CQAs, increasing the commercial value of the species.
650 $aClones
650 $aSecondary metabolites
650 $aClone
650 $aIlex Paraguariensis
653 $aÁcidos cafeoilquínicos
653 $aCaffeoylquinic acids
653 $aIncidência de luz
653 $aLight incidence
653 $aMetabólitos secundários
653 $aMethylxanthines
653 $aMetilxantinas
700 1 $aGABIRA, M. M.
700 1 $aDUARTE, M. M.
700 1 $aTOMASI, J. de C.
700 1 $aHANSEL, F. A.
700 1 $aLAVORANTI, O. J.
700 1 $aDESCHAMPS, C.
700 1 $aHELM, C. V.
700 1 $aWENDLING, I.
773 $tBiochemical Systematics and Ecology$gv. 113, 104796, 2024.
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