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 | Acesso ao texto completo restrito à biblioteca da Epagri-Sede. Para informações adicionais entre em contato com biblio@epagri.sc.gov.br. |
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
26/04/2005 |
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Data da última atualização: |
26/04/2005 |
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Autoria: |
PILLAR, V.de P.; TCACENCO, F.A. |
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Afiliação: |
Empasc |
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Título: |
Estudo da influencia ambiental sobre a ocorrencia de especies em pastagens naturalizadas no nordeste de Santa Catarina. |
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Ano de publicação: |
1990 |
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Fonte/Imprenta: |
In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 27., 1990, Campinas, SP. Anais... Piracicaba,SP: Fealq, 1990. |
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Páginas: |
p.268. |
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Idioma: |
Português |
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Palavras-Chave: |
Graminea forrageira; Pastagem; Santa Catarina. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00591naa a2200169 a 4500
001 1035150
005 2005-04-26
008 1990 bl uuuu u00u1 u #d
100 1 $aPILLAR, V.de P.
245 $aEstudo da influencia ambiental sobre a ocorrencia de especies em pastagens naturalizadas no nordeste de Santa Catarina.
260 $c1990
300 $ap.268.
653 $aGraminea forrageira
653 $aPastagem
653 $aSanta Catarina
700 1 $aTCACENCO, F.A.
773 $tIn: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 27., 1990, Campinas, SP. Anais... Piracicaba,SP: Fealq, 1990.
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
30/10/2019 |
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Data da última atualização: |
30/10/2019 |
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Tipo da produção científica: |
Artigo em Anais de Congresso / Nota Técnica |
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Autoria: |
SILVEIRA, P. R.; MILAGRES, P. O.; PEREZ, C. E. A.; CORRÊA, E. F.; WORDELL FILHO, J. A.; RODRIGUES, F. A. |
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Título: |
Changes in leaf gas exchange, chlorophyll a fluorescence, and antioxidants in maize leaves infected by Exserohilum turcicum. |
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Ano de publicação: |
2019 |
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Fonte/Imprenta: |
Biologia Plantarum, Czech Republic., v. 63, n. 1, p. 643-653, 2019. |
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Idioma: |
Inglês |
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Conteúdo: |
Considering the importance of northern leaf blight, caused by Exserohilum turcicum, to decrease maize yield, this study
evaluated electrolyte leakage, content of H2O2, malondialdehyde (MDA), chlorophyll (Chl) a, Chl b, and carotenoids
(CAR), and activities of superoxide dismutase, catalase, ascorbate peroxidase, peroxidase, glutathione reductase,
glutathione-S-transferase, and glutathione peroxidase, as well as expressions of superoxide dismutase (sod), catalase
(cat 1), ascorbate peroxidase (apx 2), peroxidase (pox), glutathione reductase (gr 1), and glutathione-S-transferase (gst 23)
genes, and leaf gas exchange and Chl a fluorescence parameters in maize leaves infected with E. turcicum. The content
of H2O2 and MDA was high at 15 and 20 d after inoculation (dai) and electrolyte leakage was high from 10 dai onward in
infected leaves. Net assimilation rate, stomatal conductance to water vapour, transpiration rate, internal CO2 concentration,
maximum quantum yield of photosystem (PS) II, and effective quantum yield of PS II significantly decreased as the
disease developed. Quantum yield of regulated energy dissipation significantly increased at 10 and 15 dai but decreased at
20 dai whereas the quantum yield of non-regulated energy dissipation significantly increased at 15 and 20 dai. The content
of Chl a, Chl b, and CAR decreased in infected leaves. The activities of the enzymes increased, and the relative expressions
of the genes sod, cat 1, apx 2, pox, gr 1, and gst 23 were higher in infected leaves compared to non-infected ones mainly
from 10 dai onward. In conclusion, photosynthesis in infected leaves was dramatically affected and a late involvement of
the antioxidant metabolism was not sufficiently helpful to counteract the deleterious effects of fungal infection. MenosConsidering the importance of northern leaf blight, caused by Exserohilum turcicum, to decrease maize yield, this study
evaluated electrolyte leakage, content of H2O2, malondialdehyde (MDA), chlorophyll (Chl) a, Chl b, and carotenoids
(CAR), and activities of superoxide dismutase, catalase, ascorbate peroxidase, peroxidase, glutathione reductase,
glutathione-S-transferase, and glutathione peroxidase, as well as expressions of superoxide dismutase (sod), catalase
(cat 1), ascorbate peroxidase (apx 2), peroxidase (pox), glutathione reductase (gr 1), and glutathione-S-transferase (gst 23)
genes, and leaf gas exchange and Chl a fluorescence parameters in maize leaves infected with E. turcicum. The content
of H2O2 and MDA was high at 15 and 20 d after inoculation (dai) and electrolyte leakage was high from 10 dai onward in
infected leaves. Net assimilation rate, stomatal conductance to water vapour, transpiration rate, internal CO2 concentration,
maximum quantum yield of photosystem (PS) II, and effective quantum yield of PS II significantly decreased as the
disease developed. Quantum yield of regulated energy dissipation significantly increased at 10 and 15 dai but decreased at
20 dai whereas the quantum yield of non-regulated energy dissipation significantly increased at 15 and 20 dai. The content
of Chl a, Chl b, and CAR decreased in infected leaves. The activities of the enzymes increased, and the relative expressions
of the genes sod, cat 1, apx 2, pox, gr 1, and gst 23 were... Mostrar Tudo |
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Palavras-Chave: |
carotenoids; gene expression; malondialdehyde; necrotrophic fungus; northern leaf blight; photosynthetic rate; stomatal conductance; transpiration rate. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02676naa a2200277 a 4500
001 1129048
005 2019-10-30
008 2019 bl uuuu u00u1 u #d
100 1 $aSILVEIRA, P. R.
245 $aChanges in leaf gas exchange, chlorophyll a fluorescence, and antioxidants in maize leaves infected by Exserohilum turcicum.$h[electronic resource]
260 $c2019
520 $aConsidering the importance of northern leaf blight, caused by Exserohilum turcicum, to decrease maize yield, this study evaluated electrolyte leakage, content of H2O2, malondialdehyde (MDA), chlorophyll (Chl) a, Chl b, and carotenoids (CAR), and activities of superoxide dismutase, catalase, ascorbate peroxidase, peroxidase, glutathione reductase, glutathione-S-transferase, and glutathione peroxidase, as well as expressions of superoxide dismutase (sod), catalase (cat 1), ascorbate peroxidase (apx 2), peroxidase (pox), glutathione reductase (gr 1), and glutathione-S-transferase (gst 23) genes, and leaf gas exchange and Chl a fluorescence parameters in maize leaves infected with E. turcicum. The content of H2O2 and MDA was high at 15 and 20 d after inoculation (dai) and electrolyte leakage was high from 10 dai onward in infected leaves. Net assimilation rate, stomatal conductance to water vapour, transpiration rate, internal CO2 concentration, maximum quantum yield of photosystem (PS) II, and effective quantum yield of PS II significantly decreased as the disease developed. Quantum yield of regulated energy dissipation significantly increased at 10 and 15 dai but decreased at 20 dai whereas the quantum yield of non-regulated energy dissipation significantly increased at 15 and 20 dai. The content of Chl a, Chl b, and CAR decreased in infected leaves. The activities of the enzymes increased, and the relative expressions of the genes sod, cat 1, apx 2, pox, gr 1, and gst 23 were higher in infected leaves compared to non-infected ones mainly from 10 dai onward. In conclusion, photosynthesis in infected leaves was dramatically affected and a late involvement of the antioxidant metabolism was not sufficiently helpful to counteract the deleterious effects of fungal infection.
653 $acarotenoids
653 $agene expression
653 $amalondialdehyde
653 $anecrotrophic fungus
653 $anorthern leaf blight
653 $aphotosynthetic rate
653 $astomatal conductance
653 $atranspiration rate
700 1 $aMILAGRES, P. O.
700 1 $aPEREZ, C. E. A.
700 1 $aCORRÊA, E. F.
700 1 $aWORDELL FILHO, J. A.
700 1 $aRODRIGUES, F. A.
773 $tBiologia Plantarum, Czech Republic.$gv. 63, n. 1, p. 643-653, 2019.
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