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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
16/03/2001 |
Data da última atualização: |
13/02/2015 |
Autoria: |
KALIL FILHO, A. N.; GRAÇA, M. E. C.; MEDEIROS, A. C. de S. |
Afiliação: |
Pesquisadores da Embrapa Florestas. |
Título: |
Efeito da concentração de sacarose na germinação de pólen de sete espécies de Pinus. |
Ano de publicação: |
2000 |
Fonte/Imprenta: |
Boletim de Pesquisa Florestal, Colombo, n. 41, p. 37-45, jul./dez. 2000. |
ISSN: |
1517-6371 |
Idioma: |
Português |
Conteúdo: |
Este trabalho verificou a viabilidade do pólen de sete espécies de Pinus, através de testes de germinação, em diferentes concentrações de sacarose in vitro. As concentrações de 10% e 20% foram as melhores para todas as espécies de Pinus estudadas. A espécie Pinus elliottii var. elliottii apresentou a mais alta taxa de germinação na concentração de 10% de sacarose, embora não diferindo estatisticamente do P. kesyia. Pinus echinata apresentou o maior valor de germinação máxima na concentração de 20% de sacarose. |
Palavras-Chave: |
Melhoramento genetico; Viabilidade. |
Thesaurus Nal: |
genetic improvement; viability. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPF-2009-09/3012/1/kalil1.pdf
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Marc: |
LEADER 01152naa a2200205 a 4500 001 1280584 005 2015-02-13 008 2000 bl uuuu u00u1 u #d 022 $a1517-6371 100 1 $aKALIL FILHO, A. N. 245 $aEfeito da concentração de sacarose na germinação de pólen de sete espécies de Pinus. 260 $c2000 520 $aEste trabalho verificou a viabilidade do pólen de sete espécies de Pinus, através de testes de germinação, em diferentes concentrações de sacarose in vitro. As concentrações de 10% e 20% foram as melhores para todas as espécies de Pinus estudadas. A espécie Pinus elliottii var. elliottii apresentou a mais alta taxa de germinação na concentração de 10% de sacarose, embora não diferindo estatisticamente do P. kesyia. Pinus echinata apresentou o maior valor de germinação máxima na concentração de 20% de sacarose. 650 $agenetic improvement 650 $aviability 653 $aMelhoramento genetico 653 $aViabilidade 700 1 $aGRAÇA, M. E. C. 700 1 $aMEDEIROS, A. C. de S. 773 $tBoletim de Pesquisa Florestal, Colombo$gn. 41, p. 37-45, jul./dez. 2000.
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Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Gado de Leite. |
Data corrente: |
09/05/2023 |
Data da última atualização: |
22/08/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 4 |
Autoria: |
PASSOS, L. P.; REIS, P. R. C.; LIMA, L. C. R. de S.; SOUZA SOBRINHO, F. de; SILVA, J. C. J. da. |
Afiliação: |
LEONIDAS PAIXAO PASSOS, CNPGL; PAOLA RAMOS COUTINHO REIS, Universidade Federal de Juiz de Fora; LORENA COSTA ROSA DE SOUZA LIMA, UniAcademia; FAUSTO DE SOUZA SOBRINHO, CNPGL; JULIO CESAR JOSE DA SILVA, Universidade Federal de Juiz de Fora. |
Título: |
Comparative effects of ammonium and nitrate ions on growthand uptake of multiple elements of ruzigrass. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Journal of Plant Nutrition, v. 46, n. 14, p. 3370-3384, 2023. |
DOI: |
https://doi.org/10.1080/01904167.2023.2205439 |
Idioma: |
Inglês |
Conteúdo: |
The preferable N source for tropical grasses and its effects on the nutritional status are still matters of priority investigation. This study aimed to explore the effects of N sources and N deprivation on growth and uptake of elements in a newly-released ruzigrass cultivar, BRS Integra. Plants were grown under controlled conditions in vermiculite and were supplied with nutrient solution containing either NH4+, NH4++NO3-, NO3- or no N added in solution making. Plant biomass, chlorophyll content, transpiration, N status, and levels of selected elements were evaluated. NH4+ improved biomass production and aboveground N contents. Other elements exhibited high (N, K and Na), medium (Mn), low (Ca, Cd, Cr, Cu, Mg, Ni and Zn) or non-detected (Al and Fe) translocation. Cd was included in the study because of its hazardous concentrations in agricultural soils in Brazil and its influence on N uptake and translocation in the genus Urochloa. All N sources increased the uptake of whole plant Cu and K and Al, and root Fe and Mg. Other favorable relations prevailed in the roots, specifically of NO3- on Ca and Ni, NH4+ and NH4++NO3- on Cr, and NH4+ on Cd. Removal of N supply caused increases on Mn and Na aboveground and Zn in roots. Overall, the more evident N source-induced uptakes were, in order of decrease, of NO3- on Ca, NH4++NO3- on Ni, and NH4+ on Cr, Cu and Mn. It is concluded that NH4+ is more efficient for fertilizing ruzigrass by improving growth and N uptake compared to NH4++NO3- or NO3-. In addition, the diverse effects of varying N sources on the uptake of 12 elements indicate such interactions should be taken into account to further improve fertilizer formulations. MenosThe preferable N source for tropical grasses and its effects on the nutritional status are still matters of priority investigation. This study aimed to explore the effects of N sources and N deprivation on growth and uptake of elements in a newly-released ruzigrass cultivar, BRS Integra. Plants were grown under controlled conditions in vermiculite and were supplied with nutrient solution containing either NH4+, NH4++NO3-, NO3- or no N added in solution making. Plant biomass, chlorophyll content, transpiration, N status, and levels of selected elements were evaluated. NH4+ improved biomass production and aboveground N contents. Other elements exhibited high (N, K and Na), medium (Mn), low (Ca, Cd, Cr, Cu, Mg, Ni and Zn) or non-detected (Al and Fe) translocation. Cd was included in the study because of its hazardous concentrations in agricultural soils in Brazil and its influence on N uptake and translocation in the genus Urochloa. All N sources increased the uptake of whole plant Cu and K and Al, and root Fe and Mg. Other favorable relations prevailed in the roots, specifically of NO3- on Ca and Ni, NH4+ and NH4++NO3- on Cr, and NH4+ on Cd. Removal of N supply caused increases on Mn and Na aboveground and Zn in roots. Overall, the more evident N source-induced uptakes were, in order of decrease, of NO3- on Ca, NH4++NO3- on Ni, and NH4+ on Cr, Cu and Mn. It is concluded that NH4+ is more efficient for fertilizing ruzigrass by improving growth and N uptake compared to NH4++NO3-... Mostrar Tudo |
Palavras-Chave: |
BRS Integra; Relações iônicas. |
Thesagro: |
Amônia; Capim; Nitrato; Nitrogênio. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
Marc: |
LEADER 02472naa a2200253 a 4500 001 2153626 005 2023-08-22 008 2023 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1080/01904167.2023.2205439$2DOI 100 1 $aPASSOS, L. P. 245 $aComparative effects of ammonium and nitrate ions on growthand uptake of multiple elements of ruzigrass.$h[electronic resource] 260 $c2023 520 $aThe preferable N source for tropical grasses and its effects on the nutritional status are still matters of priority investigation. This study aimed to explore the effects of N sources and N deprivation on growth and uptake of elements in a newly-released ruzigrass cultivar, BRS Integra. Plants were grown under controlled conditions in vermiculite and were supplied with nutrient solution containing either NH4+, NH4++NO3-, NO3- or no N added in solution making. Plant biomass, chlorophyll content, transpiration, N status, and levels of selected elements were evaluated. NH4+ improved biomass production and aboveground N contents. Other elements exhibited high (N, K and Na), medium (Mn), low (Ca, Cd, Cr, Cu, Mg, Ni and Zn) or non-detected (Al and Fe) translocation. Cd was included in the study because of its hazardous concentrations in agricultural soils in Brazil and its influence on N uptake and translocation in the genus Urochloa. All N sources increased the uptake of whole plant Cu and K and Al, and root Fe and Mg. Other favorable relations prevailed in the roots, specifically of NO3- on Ca and Ni, NH4+ and NH4++NO3- on Cr, and NH4+ on Cd. Removal of N supply caused increases on Mn and Na aboveground and Zn in roots. Overall, the more evident N source-induced uptakes were, in order of decrease, of NO3- on Ca, NH4++NO3- on Ni, and NH4+ on Cr, Cu and Mn. It is concluded that NH4+ is more efficient for fertilizing ruzigrass by improving growth and N uptake compared to NH4++NO3- or NO3-. In addition, the diverse effects of varying N sources on the uptake of 12 elements indicate such interactions should be taken into account to further improve fertilizer formulations. 650 $aAmônia 650 $aCapim 650 $aNitrato 650 $aNitrogênio 653 $aBRS Integra 653 $aRelações iônicas 700 1 $aREIS, P. R. C. 700 1 $aLIMA, L. C. R. de S. 700 1 $aSOUZA SOBRINHO, F. de 700 1 $aSILVA, J. C. J. da 773 $tJournal of Plant Nutrition$gv. 46, n. 14, p. 3370-3384, 2023.
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