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Registro Completo |
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
30/06/1993 |
Data da última atualização: |
19/03/2019 |
Autoria: |
SANTORO, L. G.; MAGALHAES, A. C. N. |
Afiliação: |
LUIZ GONZAGA SANTORO, UNICAMP; ANTONIO CELSO NOVAES MAGALHÃES, UNICAMP. |
Título: |
Changes in nitrate reductase activity during development of soybean leaf. |
Ano de publicação: |
1983 |
Fonte/Imprenta: |
Z. Pflazenphysiol. Bd., v.112, p.113-121, 1983. |
Idioma: |
Inglês |
Conteúdo: |
The in vivo and in vitro nitrate activities during the ontogeny of the first leaf showed maximum values at the time of maximum rate of leaf expansion. During this phase the changes of the enzyme activity depend on the level of endogenous nitrate in the tissues, which accumulated preferentialy in young leaves. It was shown that the in vitro nitrate reductase instability increases as leaf age progresses, Inclusion of 3% Casein in the enzyme extraction medium significantly improved enzyme activity suggesting that casein could effect the balance between some activating and inactivating component associated with protein molecule. When nitrate was supplied via the petioles of excised leaves it could be demonstrated that old leaves accumulated less nitrate than youngones. In addition it was shown that the nitrate concentration in the leaf the relation between in vivo and in vitro nitrate reductase activities. |
Palavras-Chave: |
Activity; Atividade; Desenvolvimento; Development; Enzyme; Instabilidade; Instability; Leaf; Nitrate; Soybean. |
Thesagro: |
Enzima; Fisiologia Vegetal; Folha; Nitrato; Reductase; Soja. |
Thesaurus Nal: |
physiology. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01758naa a2200337 a 4500 001 1010560 005 2019-03-19 008 1983 bl uuuu u00u1 u #d 100 1 $aSANTORO, L. G. 245 $aChanges in nitrate reductase activity during development of soybean leaf.$h[electronic resource] 260 $c1983 520 $aThe in vivo and in vitro nitrate activities during the ontogeny of the first leaf showed maximum values at the time of maximum rate of leaf expansion. During this phase the changes of the enzyme activity depend on the level of endogenous nitrate in the tissues, which accumulated preferentialy in young leaves. It was shown that the in vitro nitrate reductase instability increases as leaf age progresses, Inclusion of 3% Casein in the enzyme extraction medium significantly improved enzyme activity suggesting that casein could effect the balance between some activating and inactivating component associated with protein molecule. When nitrate was supplied via the petioles of excised leaves it could be demonstrated that old leaves accumulated less nitrate than youngones. In addition it was shown that the nitrate concentration in the leaf the relation between in vivo and in vitro nitrate reductase activities. 650 $aphysiology 650 $aEnzima 650 $aFisiologia Vegetal 650 $aFolha 650 $aNitrato 650 $aReductase 650 $aSoja 653 $aActivity 653 $aAtividade 653 $aDesenvolvimento 653 $aDevelopment 653 $aEnzyme 653 $aInstabilidade 653 $aInstability 653 $aLeaf 653 $aNitrate 653 $aSoybean 700 1 $aMAGALHAES, A. C. N. 773 $tZ. Pflazenphysiol. Bd.$gv.112, p.113-121, 1983.
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7. | | PEREIRA-NETTO, A.B. de; MAGALHÃES, A. C. N. de; PINTO, H. S. Nitrate reductase activity in field-grown pueraria lobata (Kudzu) in southeastern Brazil. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 33, n. 12, p. 1971-1975, dez. 1998. Título em português: Atividade da redutase do nitrato em plantas de Pueraria lobata crescidas no campo, no Sudeste do Brasil.Biblioteca(s): Embrapa Unidades Centrais. |
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