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| Registros recuperados : 301 | |
| 142. |  | VARGAS, L. M. P.; LIMA, J. E. F. W.; OLIVEIRA FILHO, E. C. de; SILVA, E. M. da. Fluxos de nutrientes e agrotóxicos nos recursos hídricos sob diferentes usos de terra na bacia do rio Jardim, Distrito Federal. In: MOSTRA DE RESULTADOS DE PESQUISA DOS PROJETOS FINALIZADOS EM 2006 E 2007, 2., 2009, Planaltina, DF. [Anais...]. Planaltina, DF: Embrapa Cerrados, 2009. p. 129-136. (Embrapa Cerrados. Documentos, 244). Editores técnicos Eduardo Cyrino de Oliveira-Filho, Fernando Antônio Macena da Silva, Maria Lucia Meirelles, Eduardo Alano Vieira, Geraldo Bueno Martha Junior, Arminda Moreira de Carvalho, José Carlos Sousa e Silva, CPAC.| Biblioteca(s): Embrapa Cerrados. |
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| 143. | | ÁVILA, R. G.; MAGALHAES, P. C.; SILVA, E. M. da; ALVARENGA, A. A. de; REIS, C. O. dos; CUSTÓDIO. A. M.; JAKELAITIS, A.; SOUZA, T. C. de. Foliar application of potassium nitrate induces tolerance to water deficit in pre-flowering sorghum plants. Acta Scientiarum. Agronomy, v. 44, n. 1, e53069, 2022.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 147. | | NIEMEYER, J. C.; NOGUEIRA, M. A.; CARVALHO, G. M.; COHIN-DE-PINHO, S .J.; OUTEIRO, U. S.; RODRIGUES, G. G.; SILVA, E. M. da; SOUSA, J. P. Functional and structural parameters to assess the ecological status of a metal contaminated area in the tropics. Ecotoxicology and Environmental Safety, v. 86, p. 188-197, 2012.| Biblioteca(s): Embrapa Soja. |
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| 148. | | SILVA, E. M. DA; NUNES, E. W. L. P.; COSTA, J. M. DA; RICARTE, A. DE O.; NUNES, G. H. DE S.; ARAGAO, F. A. S. de. Genotype x environment interaction, adaptability and stability of 'Piel de Sapo' melon hybrids through mixed models. Crop Breeding and Applied Biotechnology, Viçosa, v. 19, n. 4, p. 402-411, Oct./Dec. 2019.| Biblioteca(s): Embrapa Agroindústria Tropical. |
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| 149. | | SILVA, E. M. da; DINIZ, R. P.; SOUSA, M. B. e; BRAATZ, L. R.; OLIVEIRA, E. J. de. Geração de clones superiores de mandioca em progênies F1, S1 e S2 In: JORNADA CIENTÍFICA EMBRAPA MANDIOCA E FRUTICULTURA, 13., 2019. Foco e valor : resumos. Cruz das Almas, BA: Embrapa Mandioca e Fruticultura,2019. 119 p. il.| Biblioteca(s): Embrapa Mandioca e Fruticultura. |
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| 151. | | SILVA, E. M. da; BASTOS, E. A.; CARDOSO, M. J.; RIBEIRO, V. Q.; TEIXEIRA, F. F.; GOMIDE, R. L.; SILVA, A. R. da. Grain yield of maize under full irrigation and water deficit, in Teresina, Piauí state. In: INTERNATIONAL CONFERENCE OF AGRICULTURAL ENGINEERING; BRAZILIAN CONGRESS OF AGRICULTURAL ENGINEERING, 37.; INTERNATIONAL LIVESTOCK ENVIRONMENT SYMPOSIUM, 8., 2008, Iguassu Falls. Technology for all: sharing the knowledge for development: proceedings. [Foz do Iguaçu]: CIGR, 2008. 4 p.| Biblioteca(s): Embrapa Meio-Norte. |
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| 154. | | ALMEIDA, L. G.; JORGE, A. de P.; SILVA, E. M. da; MAGALHAES, P. C.; SANTOS, H. R. B.; FARIAS, M. E. de; GUILHERME, L. R. G. Growth and biochemical responses of maize cultivated in soils contaminated with cadmium and zinc. Revista Brasileira de Milho e Sorgo, Sete Lagoas, v. 16, n. 2, p. 193-203, 2017.| Biblioteca(s): Embrapa Milho e Sorgo. |
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| 157. | | LOOS, R. A.; SILVA, D. J. H. da; FONTES, P. C. R.; PICANÇO, M. C.; GONTIJO, L. M.; SILVA, E. M. da; SEMEÃO, A. A. Identificação e quantificação dos componentes de perdas de produção do tomateiro. Horticultura Brasileira, Brasília, v. 22, n. 2, p. 238-242, abr./jun. 2004.| Biblioteca(s): Embrapa Hortaliças. |
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| 158. | | BASTOS, E. A.; NASCIMENTO, S. P. do; SILVA, E. M. da; FREIRE FILHO, F. R.; GOMIDE, R. L. Identification of cowpea genotypes for drought tolerance. Revista Ciência Agronômica, Fortaleza, v. 42, n. 1, p. 100-107, jan./mar. 2011.| Biblioteca(s): Embrapa Hortaliças; Embrapa Meio-Norte; Embrapa Milho e Sorgo. |
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| 159. | | MIRANDA, M. M. M.; PICANÇO, M. C.; ZANUNCIO; J. C.; BACCI, L.; SILVA, E. M. da. Impact of integrated pest management on the population of leafminers, fruit borers, and natural enemies in tomato. Ciência Rural, Santa Maria, v. 35, n.1, p. 204-208, jan./fev. 2005.| Biblioteca(s): Embrapa Hortaliças. |
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| Registros recuperados : 301 | |
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Registro Completo
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
06/05/2008 |
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Data da última atualização: |
16/03/2015 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
RODRIGUES, E. P.; RODRIGUES, L. da S.; OLIVEIRA, A. L. M. de; BALDANI, V. L. D.; TEIXEIRA, K. R. dos S.; URQUIAGA, S.; REIS, V. M. |
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Afiliação: |
Elisete Pains Rodrigues, UFRRJ; Luciana da Silva Rodrigues, UFRRJ; André Luiz Martinez de Oliveira, UFRRJ; Vera Lúcia Divan Baldani, Embrapa Agrobiologia; Kátia Regina dos Santos Teixeira, Embrapa Agrobiologia; Segundo Urquiaga, Embrapa Agrobiologia; Veronica Massena Reis, Embrapa Agrobiologia. |
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Título: |
Azospirillum amazonense inoculation: effects on growth, yield and N2 fixation of rice (Oryza sativa L.). |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
Plant and Soil, The Netherlands, v. 302, n. 1-2, p. 249-261, jan. 2008. |
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Idioma: |
Inglês |
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Notas: |
Parceria: UFRRJ. |
|
Conteúdo: |
Bacteria of the genus Azospirillum are considered to be plant-growth promoting bacteria (PGPR) and stimulate plant growth directly either by synthesising phyto-hormones or by promoting nutrition by the process of biological nitrogen fixation (BNF). Although this genus extensively studied, the effects of inoculation and the possible BNF contribution of the Azospirillum amazonense specie are very scarce. The aim of this study was to isolate, characterise and evaluate auxin production and nitrogenase activity of this species and to select, by inoculation of rice plants, promising isolates based on their ability to improve plant growth, yield and the BNF contribution. One hundred and ten isolates obtained ftom rice were characterised and grouped according to colony features. Forty-two isolates, confirmed as A. amazonense by the fluorescent in situ hybridization (FISH) technique, were tested for auxin production and nitrogenase activity in vitro. Subsequently plant growth promotion related to plant nutrition effect was evaluated, in vitro and in greenhouse experiments. The BNF contribution to plant growth was evaluated using the 15N isotope dilution technique. All A. amazonense strains tested produced indoles, but only 10% of them showed high production, above 1.33 µM mg protein-1. The nitro-genase activity also was variable and only 9% of isolates showed high nitrogenase activity and the majority (54%) exhibited a low potential. The inocu-lation of selected strains in rice under gnotobiotic conditions reduced the growth of root and aerial part when compared to the control, showing the negative effects of excess of phytohormone accumulation in the medium. However, in the greenhouse experiment, inoculation of strains of A. amazonense increased grain dry matter accumulation (7 to 11.6%), the number of panicles (3 to 18.6%) and nitrogen accumulation at grain maturation (3.5 to 18.5%). BNF contributions up to 27% were observed for A. amazonense Y2 (wild type strain). The data presented here is the first report that the PGPR effect of A. amazonense for rice plants grown under greenhouse conditions is mainly due the BNF contribution as measured by 15N isotope dilution technique, in contrast to the hormonal effect observed with other Azospirillum species studied. MenosBacteria of the genus Azospirillum are considered to be plant-growth promoting bacteria (PGPR) and stimulate plant growth directly either by synthesising phyto-hormones or by promoting nutrition by the process of biological nitrogen fixation (BNF). Although this genus extensively studied, the effects of inoculation and the possible BNF contribution of the Azospirillum amazonense specie are very scarce. The aim of this study was to isolate, characterise and evaluate auxin production and nitrogenase activity of this species and to select, by inoculation of rice plants, promising isolates based on their ability to improve plant growth, yield and the BNF contribution. One hundred and ten isolates obtained ftom rice were characterised and grouped according to colony features. Forty-two isolates, confirmed as A. amazonense by the fluorescent in situ hybridization (FISH) technique, were tested for auxin production and nitrogenase activity in vitro. Subsequently plant growth promotion related to plant nutrition effect was evaluated, in vitro and in greenhouse experiments. The BNF contribution to plant growth was evaluated using the 15N isotope dilution technique. All A. amazonense strains tested produced indoles, but only 10% of them showed high production, above 1.33 µM mg protein-1. The nitro-genase activity also was variable and only 9% of isolates showed high nitrogenase activity and the majority (54%) exhibited a low potential. The inocu-lation of selected strains in rice under... Mostrar Tudo |
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Palavras-Chave: |
Biological nitrogen fixation; BNF; FBN; Fixação biológica de nitrogênio; Growth. |
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Thesagro: |
Arroz; Crescimento; Oryza Sativa. |
|
Thesaurus NAL: |
Azospirillum amazonense; rice. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 03231naa a2200325 a 4500
001 1629942
005 2015-03-16
008 2008 bl --- 0-- u #d
100 1 $aRODRIGUES, E. P.
245 $aAzospirillum amazonense inoculation$beffects on growth, yield and N2 fixation of rice (Oryza sativa L.).
260 $c2008
500 $aParceria: UFRRJ.
520 $aBacteria of the genus Azospirillum are considered to be plant-growth promoting bacteria (PGPR) and stimulate plant growth directly either by synthesising phyto-hormones or by promoting nutrition by the process of biological nitrogen fixation (BNF). Although this genus extensively studied, the effects of inoculation and the possible BNF contribution of the Azospirillum amazonense specie are very scarce. The aim of this study was to isolate, characterise and evaluate auxin production and nitrogenase activity of this species and to select, by inoculation of rice plants, promising isolates based on their ability to improve plant growth, yield and the BNF contribution. One hundred and ten isolates obtained ftom rice were characterised and grouped according to colony features. Forty-two isolates, confirmed as A. amazonense by the fluorescent in situ hybridization (FISH) technique, were tested for auxin production and nitrogenase activity in vitro. Subsequently plant growth promotion related to plant nutrition effect was evaluated, in vitro and in greenhouse experiments. The BNF contribution to plant growth was evaluated using the 15N isotope dilution technique. All A. amazonense strains tested produced indoles, but only 10% of them showed high production, above 1.33 µM mg protein-1. The nitro-genase activity also was variable and only 9% of isolates showed high nitrogenase activity and the majority (54%) exhibited a low potential. The inocu-lation of selected strains in rice under gnotobiotic conditions reduced the growth of root and aerial part when compared to the control, showing the negative effects of excess of phytohormone accumulation in the medium. However, in the greenhouse experiment, inoculation of strains of A. amazonense increased grain dry matter accumulation (7 to 11.6%), the number of panicles (3 to 18.6%) and nitrogen accumulation at grain maturation (3.5 to 18.5%). BNF contributions up to 27% were observed for A. amazonense Y2 (wild type strain). The data presented here is the first report that the PGPR effect of A. amazonense for rice plants grown under greenhouse conditions is mainly due the BNF contribution as measured by 15N isotope dilution technique, in contrast to the hormonal effect observed with other Azospirillum species studied.
650 $aAzospirillum amazonense
650 $arice
650 $aArroz
650 $aCrescimento
650 $aOryza Sativa
653 $aBiological nitrogen fixation
653 $aBNF
653 $aFBN
653 $aFixação biológica de nitrogênio
653 $aGrowth
700 1 $aRODRIGUES, L. da S.
700 1 $aOLIVEIRA, A. L. M. de
700 1 $aBALDANI, V. L. D.
700 1 $aTEIXEIRA, K. R. dos S.
700 1 $aURQUIAGA, S.
700 1 $aREIS, V. M.
773 $tPlant and Soil, The Netherlands$gv. 302, n. 1-2, p. 249-261, jan. 2008.
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