Chitinolytic Bacteria
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Avaliação da atividade quitinolítica por bactérias do gênero Aeromonas isoladas do ecossistema marinho. / Chitinolytic activity evaluation by Aeromonas genus strains isolated from the marine ecosystem.
Bactérias quitinolíticas desenvolvem papel fundamental no ciclo de nutrientes através da degradação da quitina no ecossistema marinho. A hidrólise da quitina é realizada por quitinases, as quais podem ser utilizadas em processos biotecnológicos. O estudo teve como objetivo avaliar as condições ótimas de cultivo de bactérias quitinolíticas seleci
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/08/2012
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2. Diversity of Chitinolytic bacteria isolated from seawater and plankton samples collected at São Paulo Coast, Brazil. / Diversidade de bactérias quitinolíticas isoladas em amostras de água do mar e plâncton coletadas na região costeira do estado de São Paulo.
Chitinolytic bacteria are autochthonous in marine ecosystems and have an important role in chitin degradation process. A very little is know about the diversity and enzymatic potential of chitinolytic bacteria isolated from coastal tropical environments. Seawater and plankton samples were collected at Canal de São Sebastião, Baixada Santista and Ubatuba. C
Publicado em: 2009
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3. Growth of Chitinolytic Dune Soil β-Subclass Proteobacteria in Response to Invading Fungal Hyphae†
It has frequently been reported that chitinolytic soil bacteria, in particular biocontrol strains, can lyse living fungal hyphae, thereby releasing potential growth substrate. However, the conditions used in such assays (high bacterial density, rich media, fragmented hyphae) make it difficult to determine whether mycolytic activity is actually of importance
American Society for Microbiology.
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4. Isolation and Characterization of Haloanaerobacter chitinovorans gen. nov., sp. nov., a Halophilic, Anaerobic, Chitinolytic Bacterium from a Solar Saltern
Two halophilic anaerobic bacteria, one of which had chitinolytic activity, were isolated from a solar saltern in southern California. These organisms were long, gram-negative, motile, flexible rods. The biochemical and physiological characteristics of these bacteria were very similar but were different from the characteristics of other haloanaerobic bacteria
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5. Molecular Analysis of a Bacterial Chitinolytic Community in an Upland Pasture†
The effects of agricultural-improvement treatments on the chitinolytic activity and diversity of a microbial community were investigated within an upland pasture. The treatments of interest were lime and treated sewage sludge, both commonly applied to pasture land to improve fertility. Burial of chitin-containing litter bags at the field site resulted in enr
American Society for Microbiology.
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6. Chitinolytic Activity in Chromobacterium violaceum: Substrate Analysis and Regulation by Quorum Sensing
Quorum sensing control mediated by N-acyl homoserine lactone (AHL) signaling molecules has been established as a key feature of the regulation of exoenzyme production in many gram-negative bacteria. In Chromobacterium violaceum ATCC 31532 a number of phenotypic characteristics, including production of the purple pigment violacein, hydrogen cyanide, antibioti
American Society for Microbiology.
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7. Genomic Analysis and Initial Characterization of the Chitinolytic System of Microbulbifer degradans Strain 2-40
The marine bacterium Microbulbifer degradans strain 2-40 produces at least 10 enzyme systems for degrading insoluble complex polysaccharides (ICP). The draft sequence of the 2-40 genome allowed a genome-wide analysis of the chitinolytic system of strain 2-40. The chitinolytic system includes three secreted chitin depolymerases (ChiA, ChiB, and ChiC), a secre
American Society for Microbiology.
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8. The Global Regulator Genes from Biocontrol Strain Serratia plymuthica IC1270: Cloning, Sequencing, and Functional Studies†
The biocontrol activity of various fluorescent pseudomonads towards plant-pathogenic fungi is dependent upon the GacA/GacS-type two-component system of global regulators and the RpoS transcription sigma factor. In particular, these components are required for the production of antifungal antibiotics and exoenzymes. To investigate the effects of these global
American Society for Microbiology.
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9. The chitinolytic cascade in Vibrios is regulated by chitin oligosaccharides and a two-component chitin catabolic sensor/kinase
Chitin, a highly insoluble polymer of GlcNAc, is produced in massive quantities in the marine environment. Fortunately for survival of aquatic ecosystems, chitin is rapidly catabolized by marine bacteria. Here we describe a bacterial two-component hybrid sensor/kinase (of the ArcB type) that rigorously controls expression of ≈50 genes, many involved in chi
National Academy of Sciences.
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10. Differentiation of Chitinase-Active and Non-Chitinase-Active Subpopulations of a Marine Bacterium during Chitin Degradation
The ability of marine bacteria to adhere to detrital particulate organic matter and rapidly switch on metabolic genes in an effort to reproduce is an important response for bacterial survival in the pelagic marine environment. The goal of this investigation was to evaluate the relationship between chitinolytic gene expression and extracellular chitinase acti
American Society for Microbiology.
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11. Plant-Dependent Genotypic and Phenotypic Diversity of Antagonistic Rhizobacteria Isolated from Different Verticillium Host Plants
To study the effect of plant species on the abundance and diversity of bacterial antagonists, the abundance, the phenotypic diversity, and the genotypic diversity of rhizobacteria isolated from potato, oilseed rape, and strawberry and from bulk soil which showed antagonistic activity towards the soilborne pathogen Verticillium dahliae Kleb. were analyzed. Rh
American Society for Microbiology.