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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
11/10/2016 |
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Data da última atualização: |
11/10/2016 |
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Autoria: |
SANTOS, L. R. dos. |
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Título: |
Brassinosteroids mitigate cadmium toxicity in cowpea. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
2016. |
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Páginas: |
56 f. |
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Idioma: |
Português |
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Notas: |
Dissertation (Magister Scientiae Degree in Agronomy) - Universidade Federal do Pará, Belém, PA. |
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Conteúdo: |
Anthropogenic activities as inadequate uses of phosphate fertilizers have been increased the cadmium concentrations in agricultural soils. Brassinosteroids are natural substances of fast assimilation and metabolism, which it plays beneficial roles in physiological and biochemical processes in plants. The objective went determinate the EBR contributions on nutrient concentrations, chlorophyll fluorescence, gas exchange, oxidant compounds, cell damages, pigments and growth,, as well as responds what better EBR concentration to be indicated in Vigna unguiculata plants exposed to Cd toxicity. The experimental design employed was entirely randomised, with two cadmium levels (0 and 500 µM Cd) and three brassinosteroids levels (0, 50 and 100 nM EBR), in a factorial 2x3. The EBR splay caused significant reductions in Cd concentrations of all tissues. Nutrient concentrations were increased by the EBR application, being verified increases to Mn (82.2%) and Fe (41.2%) in stem, as well as Cu (125%) and Zn (95.8%) in leaf, when compared with compared to 0 nM EBR + 500 ?M Cd. In relation to chlorophyll fluorescence, EBR provoked also had beneficial responses, increasing ?F/Fm?, qP and ETR, reducing NPQ, EXC and ETR/PN in plants with and without Cd toxicity. Foliar application of EBR reduced the negative effects due to Cd toxicity on gas exchanges, being detected increases of 74%, 67% and 100% to PN, WUE and PN/Ci, comparison with 0 nM EBR + 500 ?M Cd, respectively. The Cd promoted increased O2-, H2O2, MDA and EL levels, but EBR caused significant decreases in these variables, when compared to control exposed to Cd. In pigments, the pre-treated with EBR and exposed to Cd presented increases in CHL a, CHL b, total CHL, and CAR, compared the same treatments without EBR. To growth, the EBR induced significant increases of 26.2, 20.4 and 21% in the leaf, root, and plant, respectively. The results confirm the hypothesis that EBR attenuates the negative impacts promoted by the Cd toxicity on nutrient concentrations, chlorophyll fluorescence, gas exchange, pigments and growth due to reductions in absorption and transport of Cd, lower production of oxidant compounds and reduction in cell damages of cowpea plants, which can be indicated the concentration of 100 nM EBR to this crop. MenosAnthropogenic activities as inadequate uses of phosphate fertilizers have been increased the cadmium concentrations in agricultural soils. Brassinosteroids are natural substances of fast assimilation and metabolism, which it plays beneficial roles in physiological and biochemical processes in plants. The objective went determinate the EBR contributions on nutrient concentrations, chlorophyll fluorescence, gas exchange, oxidant compounds, cell damages, pigments and growth,, as well as responds what better EBR concentration to be indicated in Vigna unguiculata plants exposed to Cd toxicity. The experimental design employed was entirely randomised, with two cadmium levels (0 and 500 µM Cd) and three brassinosteroids levels (0, 50 and 100 nM EBR), in a factorial 2x3. The EBR splay caused significant reductions in Cd concentrations of all tissues. Nutrient concentrations were increased by the EBR application, being verified increases to Mn (82.2%) and Fe (41.2%) in stem, as well as Cu (125%) and Zn (95.8%) in leaf, when compared with compared to 0 nM EBR + 500 ?M Cd. In relation to chlorophyll fluorescence, EBR provoked also had beneficial responses, increasing ?F/Fm?, qP and ETR, reducing NPQ, EXC and ETR/PN in plants with and without Cd toxicity. Foliar application of EBR reduced the negative effects due to Cd toxicity on gas exchanges, being detected increases of 74%, 67% and 100% to PN, WUE and PN/Ci, comparison with 0 nM EBR + 500 ?M Cd, respectively. The Cd promoted increas... Mostrar Tudo |
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Palavras-Chave: |
Feijão caupi; Toxicidade. |
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Thesagro: |
Feijão de Corda; Vigna Unguiculata. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02830nam a2200181 a 4500
001 2054387
005 2016-10-11
008 2016 bl uuuu m 00u1 u #d
100 1 $aSANTOS, L. R. dos
245 $aBrassinosteroids mitigate cadmium toxicity in cowpea.
260 $a2016.$c2016
300 $a56 f.
500 $aDissertation (Magister Scientiae Degree in Agronomy) - Universidade Federal do Pará, Belém, PA.
520 $aAnthropogenic activities as inadequate uses of phosphate fertilizers have been increased the cadmium concentrations in agricultural soils. Brassinosteroids are natural substances of fast assimilation and metabolism, which it plays beneficial roles in physiological and biochemical processes in plants. The objective went determinate the EBR contributions on nutrient concentrations, chlorophyll fluorescence, gas exchange, oxidant compounds, cell damages, pigments and growth,, as well as responds what better EBR concentration to be indicated in Vigna unguiculata plants exposed to Cd toxicity. The experimental design employed was entirely randomised, with two cadmium levels (0 and 500 µM Cd) and three brassinosteroids levels (0, 50 and 100 nM EBR), in a factorial 2x3. The EBR splay caused significant reductions in Cd concentrations of all tissues. Nutrient concentrations were increased by the EBR application, being verified increases to Mn (82.2%) and Fe (41.2%) in stem, as well as Cu (125%) and Zn (95.8%) in leaf, when compared with compared to 0 nM EBR + 500 ?M Cd. In relation to chlorophyll fluorescence, EBR provoked also had beneficial responses, increasing ?F/Fm?, qP and ETR, reducing NPQ, EXC and ETR/PN in plants with and without Cd toxicity. Foliar application of EBR reduced the negative effects due to Cd toxicity on gas exchanges, being detected increases of 74%, 67% and 100% to PN, WUE and PN/Ci, comparison with 0 nM EBR + 500 ?M Cd, respectively. The Cd promoted increased O2-, H2O2, MDA and EL levels, but EBR caused significant decreases in these variables, when compared to control exposed to Cd. In pigments, the pre-treated with EBR and exposed to Cd presented increases in CHL a, CHL b, total CHL, and CAR, compared the same treatments without EBR. To growth, the EBR induced significant increases of 26.2, 20.4 and 21% in the leaf, root, and plant, respectively. The results confirm the hypothesis that EBR attenuates the negative impacts promoted by the Cd toxicity on nutrient concentrations, chlorophyll fluorescence, gas exchange, pigments and growth due to reductions in absorption and transport of Cd, lower production of oxidant compounds and reduction in cell damages of cowpea plants, which can be indicated the concentration of 100 nM EBR to this crop.
650 $aFeijão de Corda
650 $aVigna Unguiculata
653 $aFeijão caupi
653 $aToxicidade
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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| Registros recuperados : 173 | |
| 1. |  | SANTOS, L. R. P. Cuias ameaçadas. Revista Globo Rural, São Paulo, v. 23, n. 273, p. 31, jul. 2008. Informações prestadas por Marina Castelo Branco e Gilmar Paulo Henz, pesquisadores da Embrapa Hortaliças.| Tipo: Artigo de Divulgação na Mídia |
| Biblioteca(s): Embrapa Hortaliças. |
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| 7. | | SANTOS, L. R. dos; GASPAR, E. B. Vacina sim: na medicina veterinária também. Disponível em: https://www.embrapa.br/busca-de-noticias/-/noticia/64113417/artigo----vacina-sim-na-medicina-veterinaria-tambem. Acesso em: 21 out. 2021. Disponibilizado também em: https://www.agorams.com.br/vacina-sim-na-medicina-veterinaria-tambem/| Tipo: Artigo de Divulgação na Mídia |
| Biblioteca(s): Embrapa Pecuária Sul. |
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| 10. | | RIBEIRO, S. M.; ROSINHA, G. M. S.; SANTOS, L. R. dos; SANTOS, G. M. Avaliação da resposta imune de camundongos BALB/c a uma proteína recombinante visando o desenvolvimento de vacina contra tristeza parasitária bovina. In: JORNADA CIENTÍFICA EMBRAPA GADO DE CORTE, 11., 2015, Campo Grande, MS. Anais... Campo Grande: Embrapa Gado de Corte, 2015. 114 p. (Embrapa Gado de Corte. Documentos, 213).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Gado de Corte. |
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| 13. | | SANTOS, L. R. R. dos; LEMOS, O. F. de; RODRIGUES, S. de M. Germinação in vitro de diferentes cultivares de pimenta-do-reino (Piper nigrum L.). In: SEMINÁRIO CIENTÍFICO DA UFRA, 7.; SEMINÁRIO [DE INICIAÇÃO CIENTÍFICA] DA EMBRAPA AMAZÔNIA ORIENTAL, 13.; SEMINÁRIO DE PESQUISA DA UFRA, 1., 2009, Belém, PA. Pesquisa e desenvolvimento tecnológico na formação do jovem cientista: anais. Belém, PA: UFRA: Embrapa Amazônia Oriental, 2009. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 16. | | CAMPELO, M. F.; LEMOS, O. F. de; SANTOS, L. R. R. dos; MIRANDA, S. de R. Proliferação de brotos de cultivares de bananeira em cinco subcultivos em diferentes concentrações de benzilaminopurina a cada subcultivo. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 15., 2011, Belém, PA. A ciência de fazer ciência: anais. Belém, PA: Embrapa Amazônia Oriental, 2011. 1 CD-ROM. PIBIC-2011.| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Amazônia Oriental. |
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| Registros recuperados : 173 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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