| |
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Agrobiologia. |
|
Data corrente: |
19/07/2019 |
|
Data da última atualização: |
11/09/2020 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Autoria: |
SANTOS, S. G. dos; RIBEIRO, F. da S.; ALVES, G. C.; SANTOS, L. A.; REIS, V. M. |
|
Afiliação: |
Silvana Gomes dos Santos, Universidade Federal Rural do Rio de Janeiro; Flaviane da Silva Ribeiro, Instituto Federal do Pará, Campus Bragança; Gabriela Cavalcanti Alves, UFRRJ; Leandro Azevedo Santos, UFRRJ; VERONICA MASSENA REIS, CNPAB. |
|
Título: |
Inoculation with five diazotrophs alters nitrogen metabolism during the initial growth of sugarcane varieties with contrasting responses to added nitrogen |
|
Ano de publicação: |
2019 |
|
Fonte/Imprenta: |
Plant and Soil, First Online, 08 May, 2019 |
|
Idioma: |
Inglês |
|
Notas: |
Publicado na Plant and Soil, v. 451, 25-44, 2020. |
|
Conteúdo: |
We examined the influence of inoculation with five species/strains of diazotrophic bacteria on the modulation of two enzymes involved in the assimilation of N and on the soluble N fractions in the sugarcane varieties RB867515 (adapted for low fertility soils) and IACSP95-5000 (adapted for medium to high fertility soils) under high- (3 mM) and low (0.3 mM)-N conditions in hydroponic cultivation for 59 days.The sugarcane plants were produced in three steps to obtain the hydroponic cultivation: the supply of 3 mM N for 30 days (first harvest), N depletion for 72 h (second harvest), and cultivation in high- and low-N conditions over 26 days (final harvest). Inoculation was performed by immersion of the minisetts in a diluted solution of five diazotrophic bacteria. After the final harvest, plants were divided into roots and shoots to assess their dry weight and N, P, and K accumulation.The variety played an important role in the interaction with diazotrophs, each showing distinct behavior in the activity of their N-assimilation enzymes. The nitrate reductase activity (NRa?EC 1.7.1.1) was increased in var. RB867515 by 26% in the shoots and by 48% in the roots after 72 h under N depletion, while var. IACSP95-5000 showed a reduced enzymatic activity in the roots (by 62%) but not in the shoots. Under high-N conditions, the inoculated IACSP95-5000 plants showed 31% higher glutamine synthetase activity (GSa?EC 6.31.2) compared with 19% in RB867515. Under low-N conditions, the GSas were 21% and 16% higher in the inoculated RB867515 and IACSP95-5000 plants, respectively, compared with that of the control. The content of nitrogen in the form of nitrate (N-nitrate) confirmed these varietal differences, but the soluble sugar content did not. MenosWe examined the influence of inoculation with five species/strains of diazotrophic bacteria on the modulation of two enzymes involved in the assimilation of N and on the soluble N fractions in the sugarcane varieties RB867515 (adapted for low fertility soils) and IACSP95-5000 (adapted for medium to high fertility soils) under high- (3 mM) and low (0.3 mM)-N conditions in hydroponic cultivation for 59 days.The sugarcane plants were produced in three steps to obtain the hydroponic cultivation: the supply of 3 mM N for 30 days (first harvest), N depletion for 72 h (second harvest), and cultivation in high- and low-N conditions over 26 days (final harvest). Inoculation was performed by immersion of the minisetts in a diluted solution of five diazotrophic bacteria. After the final harvest, plants were divided into roots and shoots to assess their dry weight and N, P, and K accumulation.The variety played an important role in the interaction with diazotrophs, each showing distinct behavior in the activity of their N-assimilation enzymes. The nitrate reductase activity (NRa?EC 1.7.1.1) was increased in var. RB867515 by 26% in the shoots and by 48% in the roots after 72 h under N depletion, while var. IACSP95-5000 showed a reduced enzymatic activity in the roots (by 62%) but not in the shoots. Under high-N conditions, the inoculated IACSP95-5000 plants showed 31% higher glutamine synthetase activity (GSa?EC 6.31.2) compared with 19% in RB867515. Under low-N conditions, the GSas were... Mostrar Tudo |
|
Palavras-Chave: |
Diazotrophic bacteria; Enzymatic activity; Saccharum sp. |
|
Thesaurus Nal: |
Nitrogen. |
|
Categoria do assunto: |
S Ciências Biológicas |
|
Marc: |
LEADER 02516naa a2200229 a 4500
001 2110764
005 2020-09-11
008 2019 bl uuuu u00u1 u #d
100 1 $aSANTOS, S. G. dos
245 $aInoculation with five diazotrophs alters nitrogen metabolism during the initial growth of sugarcane varieties with contrasting responses to added nitrogen$h[electronic resource]
260 $c2019
500 $aPublicado na Plant and Soil, v. 451, 25-44, 2020.
520 $aWe examined the influence of inoculation with five species/strains of diazotrophic bacteria on the modulation of two enzymes involved in the assimilation of N and on the soluble N fractions in the sugarcane varieties RB867515 (adapted for low fertility soils) and IACSP95-5000 (adapted for medium to high fertility soils) under high- (3 mM) and low (0.3 mM)-N conditions in hydroponic cultivation for 59 days.The sugarcane plants were produced in three steps to obtain the hydroponic cultivation: the supply of 3 mM N for 30 days (first harvest), N depletion for 72 h (second harvest), and cultivation in high- and low-N conditions over 26 days (final harvest). Inoculation was performed by immersion of the minisetts in a diluted solution of five diazotrophic bacteria. After the final harvest, plants were divided into roots and shoots to assess their dry weight and N, P, and K accumulation.The variety played an important role in the interaction with diazotrophs, each showing distinct behavior in the activity of their N-assimilation enzymes. The nitrate reductase activity (NRa?EC 1.7.1.1) was increased in var. RB867515 by 26% in the shoots and by 48% in the roots after 72 h under N depletion, while var. IACSP95-5000 showed a reduced enzymatic activity in the roots (by 62%) but not in the shoots. Under high-N conditions, the inoculated IACSP95-5000 plants showed 31% higher glutamine synthetase activity (GSa?EC 6.31.2) compared with 19% in RB867515. Under low-N conditions, the GSas were 21% and 16% higher in the inoculated RB867515 and IACSP95-5000 plants, respectively, compared with that of the control. The content of nitrogen in the form of nitrate (N-nitrate) confirmed these varietal differences, but the soluble sugar content did not.
650 $aNitrogen
653 $aDiazotrophic bacteria
653 $aEnzymatic activity
653 $aSaccharum sp
700 1 $aRIBEIRO, F. da S.
700 1 $aALVES, G. C.
700 1 $aSANTOS, L. A.
700 1 $aREIS, V. M.
773 $tPlant and Soil, First Online, 08 May, 2019
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agrobiologia (CNPAB) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
Registro Completo
|
Biblioteca(s): |
Embrapa Unidades Centrais. |
|
Data corrente: |
04/05/2001 |
|
Data da última atualização: |
25/02/2019 |
|
Autoria: |
RIBEIRO, P. H. E.; RAMALHO, M. A. P.; FERREIRA, D. F. |
|
Afiliação: |
PEDRO HÉLIO ESTEVAM RIBEIRO, CPAF-RR; MAGNO ANTONIO PATTO RAMALHO, Universidade Federal de Lavras - UFLA/Departamento de Biologia; DANIEL FURTADO FERREIRA, Universidade Federal de Lavras - UFLA/Departamento de Estatística. |
|
Título: |
Adaptabilidade e estabilidade de genótipos de milho em diferentes condições ambientais. |
|
Ano de publicação: |
2000 |
|
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 35, n. 11, p. 2213-22, nov. 2000. |
|
Idioma: |
Português |
|
Notas: |
Título em inglês: Adaptability and stability of corn genotypes under different environmental conditions. |
|
Conteúdo: |
O objetivo deste trabalho foi estudar os fatores de adaptabilidade e estabilidade de 20 genotipos de milho (Zea mays L.), divididos em quatro grupos geneticos (hibridos simples, duplos e triplos e cultivares de polinizacao livre), em diferentes niveis de fertilidade, epocas de semeadura e locais do Estado de Minas Gerais. Entre os genotipos avaliadas, o que apresentou maior adaptabilidade foi o hibrido triplo Hata 3012. Observou-se que a produtividade media dos hibridos triplos foi superior à dos demais grupos. Entre os fatores ambientais estudados, verificou-se que ausencia de adubacao e semeaduras tardias foram os que mais contribuíram para a diminuicao do indice ambiental. As diferentes metodologias usadas para estimar os parametros de adaptabilidade e estabilidade, apesar de apresentarem resultados semelhantes, forneceram respostas diferenciadas com relacao a inclinacao das retas de regressao de alguns genotipos. O nivel de fertilizantes e a epoca de semeadura foram os dois fatores de maior influencia na determinacao da qualidade dos ambientes. |
|
Palavras-Chave: |
Genotype x environment interaction; Interação genótipo x ambiente; Maize; Spikes. |
|
Thesagro: |
Espiga; Milho; Peso; Zea Mays. |
|
Thesaurus NAL: |
Environmental factors; Weight. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/18862/1/pab99_051.pdf
|
|
Marc: |
LEADER 01956naa a2200277 a 4500
001 1103585
005 2019-02-25
008 2000 bl uuuu u00u1 u #d
100 1 $aRIBEIRO, P. H. E.
245 $aAdaptabilidade e estabilidade de genótipos de milho em diferentes condições ambientais.
260 $c2000
500 $aTítulo em inglês: Adaptability and stability of corn genotypes under different environmental conditions.
520 $aO objetivo deste trabalho foi estudar os fatores de adaptabilidade e estabilidade de 20 genotipos de milho (Zea mays L.), divididos em quatro grupos geneticos (hibridos simples, duplos e triplos e cultivares de polinizacao livre), em diferentes niveis de fertilidade, epocas de semeadura e locais do Estado de Minas Gerais. Entre os genotipos avaliadas, o que apresentou maior adaptabilidade foi o hibrido triplo Hata 3012. Observou-se que a produtividade media dos hibridos triplos foi superior à dos demais grupos. Entre os fatores ambientais estudados, verificou-se que ausencia de adubacao e semeaduras tardias foram os que mais contribuíram para a diminuicao do indice ambiental. As diferentes metodologias usadas para estimar os parametros de adaptabilidade e estabilidade, apesar de apresentarem resultados semelhantes, forneceram respostas diferenciadas com relacao a inclinacao das retas de regressao de alguns genotipos. O nivel de fertilizantes e a epoca de semeadura foram os dois fatores de maior influencia na determinacao da qualidade dos ambientes.
650 $aEnvironmental factors
650 $aWeight
650 $aEspiga
650 $aMilho
650 $aPeso
650 $aZea Mays
653 $aGenotype x environment interaction
653 $aInteração genótipo x ambiente
653 $aMaize
653 $aSpikes
700 1 $aRAMALHO, M. A. P.
700 1 $aFERREIRA, D. F.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 35, n. 11, p. 2213-22, nov. 2000.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
