Cell Wall Enzymes
Mostrando 25-36 de 509 artigos, teses e dissertações.
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25. Influence of the enzymes α-galactosidase and poligalacturonase in the Dalbergia nigra seed germination (Leguminoseae-Papilonoidea) / Influência das enzimas α-galactosidase e poligalacturonase na germinação de sementes de Dalbergia nigra (Leguminoseae- Papilonoidea)
This work aimed to study the enzymes α-galactosidase and polygalacturonase and to verify the composition and the alteration of the cell wall sugars and the pectic component in the teguments of D. nigra seeds during the germination. The seeds were submitted to water imbibition for 168 hours. Samples of seeds were taken for the biochemical and kinetic cha
Publicado em: 2008
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26. 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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27. Passion fruit proliferation phytoplasma: molecular identification, phylogenetic analysis and proof of pathogenicity / Fitoplasma do superbrotamento do maracujazeiro: identificação molecular, análise filogenética e prova de patogenicidade
Phytoplasmas are cell wall-less prokaryotes and phloem-inhabitants associated with diseases that affect several crops. Passion fruit plant is a tropical species cultivated in various Brazilian regions. Diseases are among factors that may cause damage to this crop and the passion fruit witchesbroom has been revealed as very important one. That disease, associ
Publicado em: 2008
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28. Effects of Aspergillus niger inoculum concentration upon the kinetics of starchy wastewater pretreatment in a tanks-in-series bioreactor under transitory conditions
This paper discusses the effects of three Aspergillus niger inoculum concentrations (0.12, 2.3 and 3.6 g/l) upon the kinetics of starch pretreatment under aerobic and transitory conditions using a tanks-in-series reactor. A synthetic wastewater containing starch as model polysaccharide was fed into the reactor system to study this polymer transformation by A
Brazilian Journal of Chemical Engineering. Publicado em: 2007-12
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29. Evaluation of the chemical composition of the cell wall of transgenic tobacco plants (Nicotiana tabacum) that superexpress the gene ugdh, that codes for the enzyme UDPglucose dehydrogenase (EC 1.1.1.22) / Avaliação da composição química da parede celular de plantas de tabaco (Nicotiana tabacum) que superexpressam o gene ugdh de soja, que codifica a enzima UDP-glicose desidrogenase (EC 1.1.1.22)
The cellular elements that constitute the xylematic tissue of various plant species are widely used in diverse industrial sectors, with numerous applications, for example, the generation of energy and production of cellulose and paper. Plant cell walls are basically formed by cellulose, hemicellulose and lignin. The formation of cellulose and hemicellulose p
Publicado em: 2007
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30. Differential metabolism of Mycoplasma species as revealed by their genomes
The annotation and comparative analyses of the genomes of Mycoplasma synoviae and Mycoplasma hyopneumonie, as well as of other Mollicutes (a group of bacteria devoid of a rigid cell wall), has set the grounds for a global understanding of their metabolism and infection mechanisms. According to the annotation data, M. synoviae and M. hyopneumoniae are able to
Genetics and Molecular Biology. Publicado em: 2007
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31. 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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32. Silicon as a potentiater of the activity of enzymes related to the defense to rust in coffee and soybean plants / Silício como potencializador da atividade de enzimas de defesa à ferrugem em plantas de café e soja
The coffee leaf rust (Hemileia vastatrix) and asian soybean rust (Phakopsora pachyrhizi) can significantly reduce yield, respectively, on coffee and soybean crops. Silicon (Si) is a beneficial element to plants because it increases host resistance to pests and diseases. In response to infection by pathogens, plants activate many mechanisms of defense such as
Publicado em: 2007
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33. Metabolism of nitrogen compounds and carbohydrates, and modification of cell wall of citrus infected by Xylella fastidiosa / Metabolismo de compostos nitrogenados e carboidratos, e alterações nas paredes celulares de plantas de citros infectadas por Xylella fastidiosa
Xylellafastidiosa (Xj) is a fastidious bacterium which grows exclusively in the xylem of several plants. In citrus the disease caused by Xf is known as "clorose variegada do citros" (CVC), being responsible for marked loss of productivity since the 80s. Although a meaningful number of reports have been published in the literature about Xf, little is know abo
Publicado em: 2006
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34. Controle de Guignardia citricarpa, agente causal da Mancha Preta dos Citros / Control of Guignardia citricarpa, causal agent of Citrus Black Spot
Citriculture is an extreme important rural activity in social and economical national context in Brazil. Orange is 49% of total brazilian fruit production. However, thousands of tons are lost due to the action of phytopathogens annually. The Black Spot of Citrus (BSC) is responsible for great lost in various citrus producers regions all around the world, bei
Publicado em: 2006
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35. Beta -1,3 glucanases, proteases e quitinases : produção, purificação e aplicação. / Beta-1,3 glucanases, protease and chitinases : production, purification and application.
The aim of this work was to study the production, purification and application of b-1,3 glucanases, proteases and chitinases. The strain Cellulosimicrobium cellulans 191 was used to study the production of b-1,3 glucanases and chitinases and strains B26 and C. cellulans 191 for the production of proteases, using culture media containing different inductors.
Publicado em: 2006
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36. Alterações morfologicas e atividades e expressão de citocromos P450 no figado de ratos tratados com L-NAME / Hepatic morphological alterations and cytochrome P450 activities and expression in rats treated with L-NAME
Nitric oxide (NO), a co-product of the metabolism of L-arginine to L-citrulline by NO synthases (NOS), has an important role in regulating vascular tone, inflammatory responses, and the gene expression and enzymatic activity of various proteins, including cytochrome P450 and NOS. The chronic inhibition of NOS by Nffi-nitro-L-arginine methyl ester (L-NAME) pr
Publicado em: 2006