Phytopathogenic Fungus
Mostrando 13-24 de 82 artigos, teses e dissertações.
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13. Intraspecific genetic diversity of Drechslera tritici-repentis as detected by random amplified polymorphic DNA analysis
The phytopathogenic fungus Drechslera tritici-repentis causes tan spot, an important disease of wheat in the southern Brazilian state of Rio Grande do Sul. Twelve D. tritici-repentis isolates were obtained from wheat seeds from different locations in the state. Their colony morphology on potato dextrose agar and polymorphisms in genomic DNA by the random amp
Publicado em: 2010
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14. Padrões de evolução genica e genomica em Moniliophthora perniciosa (Basiomicota, Agaricales), agente causal da vassoura de bruxa / Paterns of genomic evolution in Moniliophthora perniciosa (Basiomicota, Agaricales) causal agent of witche s broom disease
Moniliophthora perniciosa (Stahel) Aime &Phillips-Mora is a hemibiotrophic basidiomycete fungus that causes witches broom disease in cocoa (Theobroma cacao L.). This disease is characterized by the production of hyperplasic and hypertrophic stems and parthenogenetic fruits during biotrophic life-phasee, followed by necrosis of infected tissues during necrotr
Publicado em: 2010
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15. Identificação de novos locos de resistência à ferrugem asiática (Phakopsora pachyrhizi) em soja (Glycine max)
In Brazil, the soybean rust, caused by Phakopsora pachyrhizi, has caused yield losses and increased the cost of production by the intensive use of fungicides in soybean fields. The use of resistant varieties is an important tool to control the disease. Currently five different loci have been reported containing genes for resistance to disease, called rpp1 to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/12/2008
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16. Crescimento e esporulação de Alternaria dauci e A. solani em meio de cultura / Growth and sporulation of Alternaria dauci e Alternaria solani in culture media
Alternaria dauci e Alternaria solani are two phytopathogenic fungus species known for difficult sporulation in culture media. This hampers artificial inoculations and, consequently, affects the selection process of carrot and tomato genotypes resistant to the diseases caused by these fungi. This study had the objective of verifying the influence of some fact
Publicado em: 2007
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17. Produção de hidrolases pelo fungo Dicyma pulvinata, caracterização bioquímica de uma proteinase e purificação parcial desta enzima
The fungus Dicyma pulvinata (Deuteromycotina: Hyphomycete) shows strong biocontrol potential for plant diseases, and has been found in lesions caused in plants by Microcyclus ulei (Ascomycete), the agent of the South American Leaf Blight (SALB). This disease of the rubber tree (Hevea spp.), is a limiting factor for latex production and for expansion culture
Publicado em: 2007
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18. Caracterização bioquimica e molecular da doença vassoura-de-bruxa do cacaueiro (Theobroma cacao L.), causada pelo fungo Crinipellis perniciosa / Biochemical and molecular characterization of witches broom disease of cocoa (Theobroma cacao L.), caused by the fungus Crinipellis perniciosa
Witches? broom disease, caused by the hemibiotrophic fungus Crinipellis perniciosa, is one of the most important diseases of cocoa, causing dramatic production and economic losses. A better understanding of the cacao - C. perniciosa interaction and the processes that occur in the plant during disease progression becomes necessary in order to establish novel
Publicado em: 2006
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19. Witches broom disease of cocoa : genome organization, genetic variability and anlysis of the identity and expression of pathogenicity genes of the fungal pathogen Crinipellis perniciosa / Vassoura-de-bruxa : organização genomica, variabilidade de isolados e analise da identidade e expressão de genes ligados a patogenicidade do fungo Crinipellis perniciosa
Witches broom disease of cocoa is a complex pathosystem that has evaded an efficient control program in the cacao-producing region of Bahia, Brazil. The main goal of this work was to acquire a better understanding of the C. perniciosa-Cacao interaction by providing new data regarding: 1) the size and organization of the fungal genome through molecular karyot
Publicado em: 2006
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20. Caracterização e ocorrência de agentes causais de oídio em cucurbitáceas no Brasil e reação de germoplasma de meloeiro / Characterization and occurrence of causal agents of powdery mildew in cucurbits in Brazil and reaction of melon germplasm
O meloeiro é uma cultura de relevância econômica no Brasil, principalmente na região Nordeste, onde grande parte da produção é exportada. Entre os fatores limitantes da cultura está o oídio, que pode ser controlado através do uso de variedades resistentes. No entanto, para que isto seja possível, é necessário que se tenha conhecimento sobre qual
Publicado em: 2006
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21. Post-harvest citrus diseases: Potential of the Lentinula edodes, Agaricus blazei, jasmonic acid, mesocarp (Citrus sinensis var. Valência) and epicarp (Citrus aurantifolia var. Tahiti) in the control and in the resistance induction / Doenças pós-colheita em citros: potencial do Lentinula edodes, Agaricus blazei, ácido jasmônico, albedo (Citrus sinensis var. Valência) e flavedo (Citrus aurantifolia var. Tahiti) no controle e na indução de resistência
Brazil is considered the biggest citrus producer and the biggest orange juice exporter. Post-harvest diseases represent a great loss in the citriculture, and for many fruits to be exported they should be free of chemical residues. In relation to some pathogens of importance in post-harvest it can be mentioned Guignardia citricarpa (black-spot-ofcitrus), Peni
Publicado em: 2006
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22. Avaliação de agentes bióticos e abióticos na indução de resistência e no controle pós-colheita de antracnose (Colletotrichum gloeosporioides) em mamão (Carica papaya) / Evaluation of biotic and abiotic agents on the resistance induction and on the postharvest control of anthracnose (Colletotrichum gloeosporioides) in papaya fruits (Carica papaya)
Este trabalho teve como principais objetivos avaliar os efeitos dos agentes bióticos (Saccharomyces cerevisiae, Bacillus thuringiensis, Lentinula edodes e Agaricus blazei), e abióticos (UV-C, irradiação gama, acibenzolar-S-metil, quitosana, ácidos acético e salicílico) na proteção de mamões contra C. gloeosporioides, bem como estudar os mecanismos
Publicado em: 2006
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23. Isolamento, caracterização e regulação de genes que codificam pectato liase em Crinipellis perniciosa, agente etiológico da vassoura-de-bruxa do cacaueiro (Theobroma cacao) / Isolation, characterization and regulation of genes encoding pectate lyase in Crinipellis perniciosa, etiological agent of the witches broom in cocoa (Theobroma cacao)
In this work, genes encoding the pectinolytic enzyme pectate lyase were isolated from the genome of the fungus Crinipellis perniciosa, etiological agent of the witches broom disease of cocoa. Pectinolytic enzymes have been correlated with the pathogenicity of some phytopathogenic fungi. Preliminary database searches of the Genome Project Witches broom, revea
Publicado em: 2006
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24. Mapeamento de genes de resistência à ferrugem e de QTLs envolvidos na resistência à septoriose em soja / Mapping resistance genes to soybean rust and QTLs involved in brown spot resistance in soybean
A ocorrência de doenças em soja tem aumentado nos últimos anos, provocando grandes perdas em plantios comerciais e exigindo respostas rápidas da pesquisa para desenvolvimento e aplicação de técnicas de controle. Mais de 40 doenças afetam a cultura da soja em todo o mundo e dentre elas estão a ferrugem asiática (Phakopsora pachyrhizi Sydow) e a sept
Publicado em: 2005