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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
05/06/2000 |
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Data da última atualização: |
05/06/2000 |
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Autoria: |
MITSUEDA, T.; CHARCHAR, M. J. d' A. |
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Título: |
Mofo branco do feijoeiro (Sclerotinia sclerotiorum) nos cerrados: estudos recentes e metodos de controle. |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
In: SEMINARIO SOBRE OS PROGRESSOS DA PESQUISA AGRONOMICA NA REGIAO DOS CERRADOS, 1991, Cuiaba. [Anais]. Brasilia: EMBRAPA-CPAC/EMPA/JICA, 1992. |
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Páginas: |
p.75-80. |
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Idioma: |
Português |
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Conteúdo: |
O feijao e uma das culturas mais importantes da regiao dos Cerrados. Recentemente, os danos causados pela doenca fungica comumente chamada "Mofo Branco", esta aumentando muito, particulamente nos campos irrigados. Uma das caracteristicas deste patogeno e a formacao de esclerocios nas partes infestadas do hospedeiro. Estes esclerocios sao massas de micelio que caem no solo quando as lavouras sao colhidas e pouco tempo depois germinam em condicoes favoraveis, formando apotecios com numerosos ascosporos que se dispersam ao seu redor. Por outro lado, e bem conhecido que o micelio cresce diretamente dos esclerocios presentes no solo e, geralmente, nao invadem os tecidos do hospedeiro. (Akai 1981; Kiso 1986). Contudo, de acordo com os estudos recentes, o micelio pode infectar o hospedeiro. A acao do patogeno, acima mencionada, ocorre principalmente no espaco entre a superficie do solo ate a parte de maior acumulo foliar do feijoeiro. Isto prejudica o seu controle atraves do uso de pulverizacao quimica. Os metodos considerados efetivos no controle silo os seguintes: 1) Rotacao de culturas: 2) Evitar excesso de irrigacao; 3) Utilizacao de baixa densidade de plantas; e 4) Utilizacao de variedades menos susceptiveis. |
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Palavras-Chave: |
Bean; Fungal diseases. |
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Thesagro: |
Cerrado; Feijão; Fungo; Mofo Branco; Phaseolus Vulgaris; Sclerotinia Sclerotiorum. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01987naa a2200241 a 4500
001 1555245
005 2000-06-05
008 1992 bl uuuu u00u1 u #d
100 1 $aMITSUEDA, T.
245 $aMofo branco do feijoeiro (Sclerotinia sclerotiorum) nos cerrados$bestudos recentes e metodos de controle.
260 $c1992
300 $ap.75-80.
520 $aO feijao e uma das culturas mais importantes da regiao dos Cerrados. Recentemente, os danos causados pela doenca fungica comumente chamada "Mofo Branco", esta aumentando muito, particulamente nos campos irrigados. Uma das caracteristicas deste patogeno e a formacao de esclerocios nas partes infestadas do hospedeiro. Estes esclerocios sao massas de micelio que caem no solo quando as lavouras sao colhidas e pouco tempo depois germinam em condicoes favoraveis, formando apotecios com numerosos ascosporos que se dispersam ao seu redor. Por outro lado, e bem conhecido que o micelio cresce diretamente dos esclerocios presentes no solo e, geralmente, nao invadem os tecidos do hospedeiro. (Akai 1981; Kiso 1986). Contudo, de acordo com os estudos recentes, o micelio pode infectar o hospedeiro. A acao do patogeno, acima mencionada, ocorre principalmente no espaco entre a superficie do solo ate a parte de maior acumulo foliar do feijoeiro. Isto prejudica o seu controle atraves do uso de pulverizacao quimica. Os metodos considerados efetivos no controle silo os seguintes: 1) Rotacao de culturas: 2) Evitar excesso de irrigacao; 3) Utilizacao de baixa densidade de plantas; e 4) Utilizacao de variedades menos susceptiveis.
650 $aCerrado
650 $aFeijão
650 $aFungo
650 $aMofo Branco
650 $aPhaseolus Vulgaris
650 $aSclerotinia Sclerotiorum
653 $aBean
653 $aFungal diseases
700 1 $aCHARCHAR, M. J. d' A.
773 $tIn: SEMINARIO SOBRE OS PROGRESSOS DA PESQUISA AGRONOMICA NA REGIAO DOS CERRADOS, 1991, Cuiaba. [Anais]. Brasilia: EMBRAPA-CPAC/EMPA/JICA, 1992.
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Registro original: |
Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
25/10/2018 |
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Data da última atualização: |
24/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
SILVA, D. M.; SANTOS, Y. D.; BENITES, F. R. G.; TECHIO, V. H. |
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Afiliação: |
Dayanne Medrado Silva, UFLA; Yasmim Dutra Santos, UFLA; FLAVIO RODRIGO GANDOLFI BENITES, CNPGL; Vania Helena Techio, UFLA. |
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Título: |
Microsporogenesis, viability and morphology of pollen grain in accessions of Cynodon L. C. Rich. (Poaceae). |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
South African Journal of Botany, v. 118, p. 260-267, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
Plants of the genus Cynodon were considered as weed for a long period. However, this scenario has changed when it was observed that many species could be used in forage farming and for the recovery of degraded areas. Due to the high expansive potential, Cynodon spp. became an option for producers and aroused interest for breeding programs, besides requiring further studies on genetic and cytogenetic variability. Research onmeiosis in Cynodon are scarce since the inflorescences are small and the standardization of the stages of spikelet collections is difficult. The aimof the present studywas to evaluate the microsporogenesis, viability andmorphology of the pollen grains of two accessions of Cynodon dactylon var. dactylon (L.) Pers. (2n=4x=36, bermudagrass) and two accessions of Cynodon nlemfuensis var. nlemfuensis Vanderyst (2n=2x=18, stargrass). The slideswere prepared by squash technique and stained with 2% carmine propionic. For the viability analyses of pollen grains, 2% propionic carmine and Alexander's stain were used. The measurements and the morphology of the pollen grains were defined from analyses with the acetolysis technique and scanning electron microscopy. The meiosis of the four accessions/species was regular. The staining tests showed variations in the viability rate of the pollen grain between the diploid and tetraploid species, being higher among the tetraploids. The pollen grainsmeasured 21.1 and 28.8 μmon average for both species andwere classified as oblate spheroidal,monocolpates and showed no ornamentation, such as spicules and other attachments with non-roughened, micro reticulated exine. MenosPlants of the genus Cynodon were considered as weed for a long period. However, this scenario has changed when it was observed that many species could be used in forage farming and for the recovery of degraded areas. Due to the high expansive potential, Cynodon spp. became an option for producers and aroused interest for breeding programs, besides requiring further studies on genetic and cytogenetic variability. Research onmeiosis in Cynodon are scarce since the inflorescences are small and the standardization of the stages of spikelet collections is difficult. The aimof the present studywas to evaluate the microsporogenesis, viability andmorphology of the pollen grains of two accessions of Cynodon dactylon var. dactylon (L.) Pers. (2n=4x=36, bermudagrass) and two accessions of Cynodon nlemfuensis var. nlemfuensis Vanderyst (2n=2x=18, stargrass). The slideswere prepared by squash technique and stained with 2% carmine propionic. For the viability analyses of pollen grains, 2% propionic carmine and Alexander's stain were used. The measurements and the morphology of the pollen grains were defined from analyses with the acetolysis technique and scanning electron microscopy. The meiosis of the four accessions/species was regular. The staining tests showed variations in the viability rate of the pollen grain between the diploid and tetraploid species, being higher among the tetraploids. The pollen grainsmeasured 21.1 and 28.8 μmon average for both species andwere classified a... Mostrar Tudo |
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Palavras-Chave: |
Bermuda grass; Pollen grain; Star grass. |
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Thesaurus NAL: |
Forage grasses; Meiosis. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02290naa a2200217 a 4500
001 2098248
005 2023-01-24
008 2018 bl uuuu u00u1 u #d
100 1 $aSILVA, D. M.
245 $aMicrosporogenesis, viability and morphology of pollen grain in accessions of Cynodon L. C. Rich. (Poaceae).$h[electronic resource]
260 $c2018
520 $aPlants of the genus Cynodon were considered as weed for a long period. However, this scenario has changed when it was observed that many species could be used in forage farming and for the recovery of degraded areas. Due to the high expansive potential, Cynodon spp. became an option for producers and aroused interest for breeding programs, besides requiring further studies on genetic and cytogenetic variability. Research onmeiosis in Cynodon are scarce since the inflorescences are small and the standardization of the stages of spikelet collections is difficult. The aimof the present studywas to evaluate the microsporogenesis, viability andmorphology of the pollen grains of two accessions of Cynodon dactylon var. dactylon (L.) Pers. (2n=4x=36, bermudagrass) and two accessions of Cynodon nlemfuensis var. nlemfuensis Vanderyst (2n=2x=18, stargrass). The slideswere prepared by squash technique and stained with 2% carmine propionic. For the viability analyses of pollen grains, 2% propionic carmine and Alexander's stain were used. The measurements and the morphology of the pollen grains were defined from analyses with the acetolysis technique and scanning electron microscopy. The meiosis of the four accessions/species was regular. The staining tests showed variations in the viability rate of the pollen grain between the diploid and tetraploid species, being higher among the tetraploids. The pollen grainsmeasured 21.1 and 28.8 μmon average for both species andwere classified as oblate spheroidal,monocolpates and showed no ornamentation, such as spicules and other attachments with non-roughened, micro reticulated exine.
650 $aForage grasses
650 $aMeiosis
653 $aBermuda grass
653 $aPollen grain
653 $aStar grass
700 1 $aSANTOS, Y. D.
700 1 $aBENITES, F. R. G.
700 1 $aTECHIO, V. H.
773 $tSouth African Journal of Botany$gv. 118, p. 260-267, 2018.
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