Mycoparasitism
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Isolation and expression of two polyketide synthase genes from Trichoderma harzianum 88 during mycoparasitism
Abstract Metabolites of mycoparasitic fungal species such as Trichoderma harzianum 88 have important biological roles. In this study, two new ketoacyl synthase (KS) fragments were isolated from cultured Trichoderma harzianum 88 mycelia using degenerate primers and analysed using a phylogenetic tree. The gene fragments were determined to be present as single
Braz. J. Microbiol.. Publicado em: 2016-06
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2. Identificação, caracterização molecular e avaliação da expressão do gene de uma proteína elicitora de defesa de trichoderma spp. / Identification, molecular characterization and evaluation of gene expression of a protein elicitors of defense of Trichoderma spp.
Species of the genus Trichoderma have been used as biocontrol agents against different pathogens. The mechanisms employed by Trichoderma species against these pathogens ranging from competition for nutrients, production of non-volatile and volatile antibiotics in the production of hydrolytic enzymes, in a mechanism denominated mycoparasitism. In addition to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
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3. Identificação, caracterização molecular e avaliação da expressão do gene de uma proteína elicitora de defesa de trichoderma spp. / Identification, molecular characterization and evaluation of gene expression of a protein elicitors of defense of Trichoderma spp.
Species of the genus Trichoderma have been used as biocontrol agents against different pathogens. The mechanisms employed by Trichoderma species against these pathogens ranging from competition for nutrients, production of non-volatile and volatile antibiotics in the production of hydrolytic enzymes, in a mechanism denominated mycoparasitism. In addition to
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
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4. Análise do secretoma do fungo Trichoderma harzianum crescido em presença de glicose ou parede celular de Fusarium solani / Analysis of the secretome of Trichoderma harzianum grown in the presence of glucose or cell walls of Fusarium solani
Trichoderma harzianum é um fungo saprofítico, conhecido devido ao seu grande potencial como agente de controle biológico de diferentes fitopatógenos. Sua ação é baseada em diferentes mecanismos como a produção de antibióticos voláteis e não-voláteis, competição por espaço e nutrientes, produção de enzimas hidrolíticas e o micoparasitismo.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/03/2010
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5. Analysis of the secretome of Trichoderma harzianum grown in the presence of glucose or cell walls of Fusarium solani / Análise do secretoma do fungo Trichoderma harzianum crescido em presença de glicose ou parede celular de Fusarium solani
Trichoderma harzianum é um fungo saprofítico, conhecido devido ao seu grande potencial como agente de controle biológico de diferentes fitopatógenos. Sua ação é baseada em diferentes mecanismos como a produção de antibióticos voláteis e não-voláteis, competição por espaço e nutrientes, produção de enzimas hidrolíticas e o micoparasitismo.
Publicado em: 2010
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6. Efeito da fonte de carbono e nitrogênio na produção de β1,3glucanases por Trichoderma asperellum / Effect of source of carbon and nitrogen in the production of β-1 ,3-glucanase by Trichoderma asperellum
The β-1.3-glucanases have several functions in the cell as fungal metabolic in hydrolysis of polysaccharides for possible cellular assimilation; morphogenetic function in the hydrolysis or modifications of the cell wall, which includes growth and extension of the wall, altering the structure and composition of the wall and autolysis. In addition to pres
Publicado em: 2008
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7. Avaliação da expressão e caracterização de uma exo-ß-1,3-glucanase envolvida no mecanismo de micoparasitismo de Trichoderma asperellum
Species of the genus Trichoderma have been found to attack a wide range of plant-pathogenic fungi and have been used as biocontrol agents. The majority of Trichoderma preparations used commercially for biological control are Trichoderma atroviride or Trichoderma harzianum. However, Trichoderma asperellum, a less well studied species, is also an effective bio
Publicado em: 2008
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8. Estudos de sinalização celular em Hypocrea jecorina (Trichoderma reesei) durante a expressão dos genes de celulase (cbh1 e cbh2) em presença de celulose e soforose e durante o antagonismo contra Pythium ultimum
Trichoderma reesei (Hypocrea jecorina) is widely used in industry and its potential for use in agriculture as a biocontrol agent against phytopathogenic fungi has just begun to be explored. The adenylate cyclase activating subgroup III Ga proteinencoding gene gna3 of T. reesei was cloned to study its possible role in the control of cellulose and sophorose to
Publicado em: 2008
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9. Enhanced biocontrol activity of Trichoderma through inactivation of a mitogen-activated protein kinase
The production of lytic enzymes in Trichoderma is considered determinant in its parasitic response against fungal species. A mitogen-activated protein kinase encoding gene, tvk1, from Trichoderma virens was cloned, and its role during the mycoparasitism, conidiation, and biocontrol was examined in tvk1 null mutants. These mutants showed a clear increase in t
National Academy of Sciences.
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10. Role of the Trichoderma harzianum Endochitinase Gene, ech42, in Mycoparasitism
The role of the Trichoderma harzianum endochitinase (Ech42) in mycoparasitism was studied by genetically manipulating the gene that encodes Ech42, ech42. We constructed several transgenic T. harzianum strains carrying multiple copies of ech42 and the corresponding gene disruptants. The level of extracellular endochitinase activity when T. harzianum was grown
American Society for Microbiology.
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11. Possible role of lectins in mycoparasitism.
Lectin activity in a host-mycoparasite relationship was demonstrated with Rhizoctonia solani and Trichoderma harzianum. Attachment of O but not A and B erythrocytes to hyphae occurred on R. solani but not on its mycoparasite. This phenomenon, which was Ca2+ and Mn2+ dependent, was prevented by galactose, present in T. harzianum cell walls, and by fucose.
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12. Biomimics of fungal cell-cell recognition by use of lectin-coated nylon fibers.
When the mycoparasitic, biocontrol fungus Trichoderma harzianum was allowed to grow on nylon fibers treated with concanavalin A or Sclerotium rolfsii lectin, it coiled around the nylon fibers and produced hooks in a pattern similar to that observed with the real host hyphae. The incidence of interaction between T. harzianum and S. rolfsii lectin-treated fibe