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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
25/02/2016 |
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Data da última atualização: |
25/02/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
ARAUJO, L.; PASCHOALINO, R. S.; RODRIGUES, F. Á. |
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Título: |
Microscopic Aspects of Silicon-Mediated Rice Resistance to Leaf Scald. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Phytopathology, St. Paul, v. 106, n. 2, p. 132-141, 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
This study investigated the effect of silicon (Si) on the potentiation of rice
resistance against leaf scald at the microscopic level. Rice plants (?Primavera?)
weregrowninanutrientsolutioncontaining0(_Si) or 2 mM (+Si) Si. The
foliar Si concentration of the+Si plants (3.6 dag/kg) increased in comparison with the
_Si plants (0.3 dag/kg). An X-ray microanalysis revealed that the leaf
tissue of +Si plants infected withMicrodochium oryzaehad higher peaks and
deposition of insoluble Si than that of_Si plants. The high foliar Siconcentration for the+Si plants reduced the expansion of leaf scald lesions. Scanning electron microscopy revealed that fungal hyphae and appressoriumlike structures of M. oryzaewere more abundant in the leaf surface of_Si plants relative to+Si plants. At both histopathological and ultrastructural
levels, fungal hyphae grew abundantly into the leaf tissue of_Si plants. By
contrast, rice cell walls were rarely degraded and fungal hyphae were often
surrounded by amorphous granular material in the leaf tissue of+Si plants.
Conidiophores emerged from stomata 36 h after fungal penetration, and
conidia were noticed inside the leaf tissue of the_Si plants in great abundance.
The collective results of the present study showed a high concentration and
deposition of Si and a considerable deposition of phenolic-like compounds in
the leaf tissue of +Si plants. These results indicate that the potentiation of the
phenylpropanoid pathway in these plants supplied with Si was favorable for
the increase in rice resistance to leaf scald. MenosThis study investigated the effect of silicon (Si) on the potentiation of rice
resistance against leaf scald at the microscopic level. Rice plants (?Primavera?)
weregrowninanutrientsolutioncontaining0(_Si) or 2 mM (+Si) Si. The
foliar Si concentration of the+Si plants (3.6 dag/kg) increased in comparison with the
_Si plants (0.3 dag/kg). An X-ray microanalysis revealed that the leaf
tissue of +Si plants infected withMicrodochium oryzaehad higher peaks and
deposition of insoluble Si than that of_Si plants. The high foliar Siconcentration for the+Si plants reduced the expansion of leaf scald lesions. Scanning electron microscopy revealed that fungal hyphae and appressoriumlike structures of M. oryzaewere more abundant in the leaf surface of_Si plants relative to+Si plants. At both histopathological and ultrastructural
levels, fungal hyphae grew abundantly into the leaf tissue of_Si plants. By
contrast, rice cell walls were rarely degraded and fungal hyphae were often
surrounded by amorphous granular material in the leaf tissue of+Si plants.
Conidiophores emerged from stomata 36 h after fungal penetration, and
conidia were noticed inside the leaf tissue of the_Si plants in great abundance.
The collective results of the present study showed a high concentration and
deposition of Si and a considerable deposition of phenolic-like compounds in
the leaf tissue of +Si plants. These results indicate that the potentiation of the
phenylpropanoid pathway in these plants supplied with Si ... Mostrar Tudo |
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Palavras-Chave: |
host defense responses; Monographella albescens; Oryza sativa. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02111naa a2200181 a 4500
001 1124901
005 2016-02-25
008 2016 bl uuuu u00u1 u #d
100 1 $aARAUJO, L.
245 $aMicroscopic Aspects of Silicon-Mediated Rice Resistance to Leaf Scald.$h[electronic resource]
260 $c2016
520 $aThis study investigated the effect of silicon (Si) on the potentiation of rice resistance against leaf scald at the microscopic level. Rice plants (?Primavera?) weregrowninanutrientsolutioncontaining0(_Si) or 2 mM (+Si) Si. The foliar Si concentration of the+Si plants (3.6 dag/kg) increased in comparison with the _Si plants (0.3 dag/kg). An X-ray microanalysis revealed that the leaf tissue of +Si plants infected withMicrodochium oryzaehad higher peaks and deposition of insoluble Si than that of_Si plants. The high foliar Siconcentration for the+Si plants reduced the expansion of leaf scald lesions. Scanning electron microscopy revealed that fungal hyphae and appressoriumlike structures of M. oryzaewere more abundant in the leaf surface of_Si plants relative to+Si plants. At both histopathological and ultrastructural levels, fungal hyphae grew abundantly into the leaf tissue of_Si plants. By contrast, rice cell walls were rarely degraded and fungal hyphae were often surrounded by amorphous granular material in the leaf tissue of+Si plants. Conidiophores emerged from stomata 36 h after fungal penetration, and conidia were noticed inside the leaf tissue of the_Si plants in great abundance. The collective results of the present study showed a high concentration and deposition of Si and a considerable deposition of phenolic-like compounds in the leaf tissue of +Si plants. These results indicate that the potentiation of the phenylpropanoid pathway in these plants supplied with Si was favorable for the increase in rice resistance to leaf scald.
653 $ahost defense responses
653 $aMonographella albescens
653 $aOryza sativa
700 1 $aPASCHOALINO, R. S.
700 1 $aRODRIGUES, F. Á.
773 $tPhytopathology, St. Paul$gv. 106, n. 2, p. 132-141, 2016.
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Epagri-Sede (Epagri-Sede) |
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Registro Completo
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Biblioteca(s): |
Epagri-Sede. |
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Data corrente: |
22/08/2005 |
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Data da última atualização: |
22/08/2005 |
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Autoria: |
VIEIRA, J.; ISHIY, T.; SCHIOCCHET, M. A.; MARSCHALEK, R. |
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Afiliação: |
Epagri |
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Título: |
Avaliacao de genotipos de arroz (Oryza sativa L.) quanto a resistencia a brusone. |
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Ano de publicação: |
2005 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 4., REUNIAO DA CULTURA DO ARROZ IRRIGADO, 26., 2005, Santa Maria-RS. Anais... Santa Maria: Editora Orium, 2005. |
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Volume: |
v.1 |
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Páginas: |
p. 35-40. |
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Idioma: |
Português |
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Palavras-Chave: |
Arroz; Biotecnologia; Brusone; Genotipo; Melhoramento; Resistencia a doenca. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00749naa a2200241 a 4500
001 1038734
005 2005-08-22
008 2005 bl uuuu u00u1 u #d
100 1 $aVIEIRA, J.
245 $aAvaliacao de genotipos de arroz (Oryza sativa L.) quanto a resistencia a brusone.
260 $c2005
300 $ap. 35-40. v.1
490 $vv.1
653 $aArroz
653 $aBiotecnologia
653 $aBrusone
653 $aGenotipo
653 $aMelhoramento
653 $aResistencia a doenca
700 1 $aISHIY, T.
700 1 $aSCHIOCCHET, M. A.
700 1 $aMARSCHALEK, R.
773 $tIn: CONGRESSO BRASILEIRO DE ARROZ IRRIGADO, 4., REUNIAO DA CULTURA DO ARROZ IRRIGADO, 26., 2005, Santa Maria-RS. Anais... Santa Maria: Editora Orium, 2005.
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