50 documents found, page 1 of 5
Effects of Cryphonectria parasitica infection by the hypovirus CHV1 on cellulas...
Tayechi, Yosri; Jorge, Lurdes; Coelho, Valentim; Gouveia, Maria EugéniaCryphonectria parasitica is the causal agent of Castanea sativa chestnut blight, an economically important disease. Hypovirulence is due to the presence of a virus, the Cryphonectria hypovirus 1 (CHV1), that attenuates fungus pathogenicity by reducing the sporulation, and the enzymatic activity of pathogenesis-related enzymes. In several regions affected by C. parasitica, the release of C. parasitica hypovirule...
Effects of Cryphonectria parasitica infection by the hypovirus CHV1 on cellulas...
Tayechi, Yosri; Jorge, Lurdes; Coelho, Valentim; Gouveia, Maria EugéniaCryphonectria parasitica is the causal agent of Castanea sativa chestnut blight, an economically important disease. Hypovirulence is due to the presence of a virus, the Cryphonectria hypovirus 1 (CHV1), that attenuates fungus pathogenicity by reducing the sporulation, and the enzymatic activity of pathogenesis-related enzymes. In several regions affected by C. parasitica, the release of C. parasitica hypovirule...
Evaluation of virulence and the laccase production on Cryphonectria Parasitica ...
Boumnigel, Houssem; Coelho, Valentim; Souiai, Oucema; Jorge, Lurdes; Gouveia, Maria EugéniaBiological control by hypovirulence is an efficient method to control chestnut blight. The presence of Cryphonectria hypovirus 1 (CHV1) in Cryphonectria parasitica reduces its parasitic growth and sporulation capacity, female fertility, pigmentation, oxalate accumulation and laccase production. Indeed, laccases are involved in lignin degradation, and are also considered as a virulence determinant in C. parasiti...
Evaluation of virulence and the oxalic acid production on Cryphonectria parasit...
Gadoum, Horiya; Coelho, Valentim; Noui, Abdallah; Jorge, Lurdes; Gouveia, Maria EugéniaChestnut Blight, caused by Cryphonectria parasitica (Murrill) Bar, is a major disease in Castanea sativa Mill. on the European continent. Biological control by hypovirulence is a sustainable and efficient method to control the disease. The presence of Cryphonectria hypovirus 1 (CHV1) in C. parasitica reduces the fungus virulence that promote canker healing and tree recovery. Hypovirus infection results in pheno...
Virulência, enzimas lenhinolíticas e perfil metabólico de cryphonectria parasit...
Abdellaziz, Omar; Jorge, Lurdes; Moura, Luísa; Coelho, Valentim; Gouveia, Maria EugéniaCryphonectria parasitica, fungo responsável pelo cancro do castanheiro, causa lesões necróticas (cancros corticais) no tronco e ramos das árvores hospedeiras. O hipovírus, Cryphonectria hypovirus 1 (CHV1) reduz a virulência (hipovirulência) e altera a morfologia do fungo em cultura (redução da pigmentação e esporulação). As estirpes hipovirulentas CHV1 são utilizadas com sucesso na Europa como agentes de contro...
Virulence, ligninolytic enzymes and metabolic profile of Cryphonectria parasiti...
Ouni, Omar Abdelaziz; Jorge, Lurdes; Moura, Luísa; Coelho, Valentim; Gouveia, EugéniaIntroduction: Cryphonectria parasitica, the causal agent of chestnut blight, causes necrotic lesions (so-called cankers) on the bark of stems and branches of susceptible host trees. Cryphonectria hypovirus 1 (CHV1) infects C. parasitica and reduces the fungus virulence (hypovirulence) and alters the fungus morphology in culture (pigmentation and sporulation capacity). By these characteristics, the strains with ...
Virulence, ligninolytic enzymes and metabolic profile of Cryphonectria parasiti...
Ouni, Omar Abdelaziz; Jorge, Lurdes; Moura, Luísa; Coelho, Valentim; Gouveia, EugéniaIntroduction: Cryphonectria parasitica, the causal agent of chestnut blight, causes necrotic lesions (so-called cankers) on the bark of stems and branches of susceptible host trees. Cryphonectria hypovirus 1 (CHV1) infects C. parasitica and reduces the fungus virulence (hypovirulence) and alters the fungus morphology in culture (pigmentation and sporulation capacity). By these characteristics, the strains with ...
Characterization of ligninolytic enzymes and metabolic profile of cryphonectria...
Abdellaziz, Omar; Jorge, Lurdes; Moura, Luísa; Coelho, Valentim; Gouveia, Maria EugéniaCryphonectria parasitica, the causal agent of chestnut blight, causes necrotic lesions (so-called cankers) on the bark of stems and branches of susceptible host trees. Cryphonectria Hypovirus 1 (CHV1) infects C. parasitica and reduces the fungus virulence (hypovirulence) and alters the fungus morphology in culture (pigmentation and sporulation capacity). By this characteristics the mycovirus CHV1 is used in Eur...
Characterization of ligninolytic enzymes and metabolic profile of Cryphonectria...
Abdellaziz, Omar; Jorge, Lurdes; Moura, Luísa; Coelho, Valentim; Gouveia, Maria EugéniaCryphonectria parasitica, the causal agent of chestnut blight, causes necrotic lesions (so-called cankers) on the bark of stems and branches of susceptible host trees. Cryphonectria Hypovirus 1 (CHV1) infects C. parasitica and reduces the fungus virulence (hypovirulence) and alters the fungus morphology in culture (pigmentation and sporulation capacity). By this characteristics the mycovirus CHV1 is used in Eur...
Trichoderma harzianum lipolyitic enzymes - a contribution
Jorge, Lurdes; Monte, Enrique; Choupina, AltinoTrichoderma sp. has been related to the mycoparasitism process due to an extraordinary range of cell-wall degrading enzymes (CWDE): chitinases, β-1,3 and β-1,6 glucanases, celulases and proteases. However, the role of lipases and carboxylesterases in this process is less known, although lipids were up to 3% of fungal CW (Feofilova, 2010). According to Silva et al. (2009) and Lopes et al. (2012), in experiments ...