| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Unidades Centrais. |
|
Data corrente: |
01/08/1997 |
|
Data da última atualização: |
12/08/2019 |
|
Autoria: |
USBERTI, R.; VALIO, I. F. M. |
|
Afiliação: |
ROBERTO USBERTI, Coordenadoria de Assistência Técnica Integral - CATI/Departamento de Sementes, Mudas e Matrizes; IVANY FERRAZ MARQUES VALIO, Universidade Estadual de Campinas - UNICAMP/Instituto de Biologia. |
|
Título: |
Endogenous growth regulator detection in Guinea grass seeds. |
|
Ano de publicação: |
1997 |
|
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 32, n. 7, p. 695-700, jul. 1997. |
|
Idioma: |
Inglês |
|
Notas: |
Título em português: Detecção de reguladores endógenos de crescimento em sementes de capim-colonião. |
|
Conteúdo: |
Endogenous growth regulator activity/levei was detected lii guinea grass (Panicum Inaximum Jacq.) seeds, a species widely used as a forage crop in the tropics, aiming at explaining its high seed dormancy levei. Seeds were previously scarified or not with suiphuric acid and osmoconditioned on PEG-6000. Endogenous growth regulators were detected as follow: gibberellin-like activity (growth of iettuce hypocotyi bioassay); cytokinins (increase of fresh mass of radish cotylcdon bioassay); ABA (spectrophotometer at 230 nm). Exogenous application of GA, showed a germination increasing effect while ABA had a complete effectivenessto prevent it. High-dormancy seed samples had higher gibbereilin-like actívity than low-dormancy ones and intact seeds showed higher gibberellin-like activity than scarified seeds; however, after osmoconditioning, opposite results were recorded. No significant activity of neutral promoters and cytokinins was detected. Average leveis of ABA for untreated, osmoconditioned after zero- and two-month-storage seed saznples were 0.51,0.39 and 0.21 mg. 100 kg 4, respectively. Chemical scarification did not alter either ABA leveis in high-dormancy seed samples (0.66 mg.l00 kg 4 ) or those of low-dormancy (0.23 mg. 100 kg'), lhe fornier being significantly higher than the latter. Finally, the results show that a gibberellin-ABA interaction appears to be the main factor accounting for dormancy, germination and osmoconditioning control in guinea grass seeds. |
|
Palavras-Chave: |
Osmocondicionamento; Osmoconditioning. |
|
Thesagro: |
Dormência; Germinação; Panicum Maximum. |
|
Thesaurus Nal: |
dormancy; germination. |
|
Categoria do assunto: |
-- |
|
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/108662/1/ENDOGENOUS.pdf
|
|
Marc: |
LEADER 02221naa a2200229 a 4500
001 1089888
005 2019-08-12
008 1997 bl uuuu u00u1 u #d
100 1 $aUSBERTI, R.
245 $aEndogenous growth regulator detection in Guinea grass seeds.
260 $c1997
500 $aTítulo em português: Detecção de reguladores endógenos de crescimento em sementes de capim-colonião.
520 $aEndogenous growth regulator activity/levei was detected lii guinea grass (Panicum Inaximum Jacq.) seeds, a species widely used as a forage crop in the tropics, aiming at explaining its high seed dormancy levei. Seeds were previously scarified or not with suiphuric acid and osmoconditioned on PEG-6000. Endogenous growth regulators were detected as follow: gibberellin-like activity (growth of iettuce hypocotyi bioassay); cytokinins (increase of fresh mass of radish cotylcdon bioassay); ABA (spectrophotometer at 230 nm). Exogenous application of GA, showed a germination increasing effect while ABA had a complete effectivenessto prevent it. High-dormancy seed samples had higher gibbereilin-like actívity than low-dormancy ones and intact seeds showed higher gibberellin-like activity than scarified seeds; however, after osmoconditioning, opposite results were recorded. No significant activity of neutral promoters and cytokinins was detected. Average leveis of ABA for untreated, osmoconditioned after zero- and two-month-storage seed saznples were 0.51,0.39 and 0.21 mg. 100 kg 4, respectively. Chemical scarification did not alter either ABA leveis in high-dormancy seed samples (0.66 mg.l00 kg 4 ) or those of low-dormancy (0.23 mg. 100 kg'), lhe fornier being significantly higher than the latter. Finally, the results show that a gibberellin-ABA interaction appears to be the main factor accounting for dormancy, germination and osmoconditioning control in guinea grass seeds.
650 $adormancy
650 $agermination
650 $aDormência
650 $aGerminação
650 $aPanicum Maximum
653 $aOsmocondicionamento
653 $aOsmoconditioning
700 1 $aVALIO, I. F. M.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 32, n. 7, p. 695-700, jul. 1997.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
| Registros recuperados : 169 | |
| 18. |  | BAYMA, M. M. A.; SA, C. P. de. Importância econômica do abacaxi. In: ANDRADE NETO, R. de C.; NOGUEIRA, S. R.; NASCIMENTO, G. C. do; NEGREIROS, J. R. da S.; GOMES, F. C. da R. Sistema de produção da cultura do abacaxi para o estado do Acre. Rio Branco, AC: Embrapa Acre, 2018. Publicação eletrônica. (Embrapa Acre. Sistema de produção, 9).| Tipo: Capítulo em Livro Técnico-Científico |
| Biblioteca(s): Embrapa Acre. |
|    |
| Registros recuperados : 169 | |
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
