Phytopathogenicity
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Análise proteômica diferencial da fração periplasmática das estirpes A, B e C de Xanthomonas spp. que diferem na patogenicidade e espectro de citros hospedeiros
O presente trabalho teve por objetivo a análise proteômica comparativa da fração periplasmática das estirpes-genoma A, B e C de Xanthomonas spp, as quais diferem em patogenicidade e gama de citros hospedeiros. A estirpe A (Xanthomonas citri subsp. citri, Xac) é a mais virulenta e infecta todos os tipos de citros, enquanto que a estirpe B (Xanthomonas f
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2012
-
2. Molecular modeling and spectroscopic characterization of two proteins from Xylella fastidiosa potentially involved with phytopathogenicity / Modelagem molecular e caracterização espectroscopica de duas proteinas de Xylella fastidiosa potencilamente envolvidas com fitopatogenicidade
O fitopatogeno Xylella fastidiosa é uma bactéria limitada ao xilema que causa uma variedade de doenças economicamente importantes em plantas, incluindo uma doença chamada Clorose Variegada de Citrus (CVC). Recentemente, os dados de sequenciamento do DNA fornecidos pelo projeto genoma da Xylella fastidiosa permitiram uma aproximação da área genoma func
Publicado em: 2007
-
3. Expressão e detecção de genes envolvidos com patogenicidade de Crinipellis perniciosa
The fungus Crinipellis perniciosa Stahel (Singer), attacks meristematic tissues of the cocoa tree Theobroma cacao, causing abnormalities like hyperplasia and hypertrophy in the infected tissues, which results in the disease known as witches? broom. In the cocoa producing regions in the State of Bahia, witches? broom has caused major economic loss and efforts
Publicado em: 2004
-
4. A Xanthomonas campestris pv. campestris protein similar to catabolite activation factor is involved in regulation of phytopathogenicity.
A DNA fragment from Xanthomonas campestris pv. campestris that partially restored the carbohydrate fermentation pattern of a cya crp Escherichia coli strain was cloned and expressed in E. coli. The nucleotide sequence of this fragment revealed the presence of a 700-base-pair open reading frame that coded for a protein highly similar to the catabolite activat
-
5. Bacteriocin-resistant mutants of Erwinia chrysanthemi: possible involvement of iron acquisition in phytopathogenicity.
A series of bacteriocin-resistant mutants of Erwinia chrysanthemi 3937JRH were unable to elicit soft-rot symptoms on saintpaulia plants. The loss of pathogenicity was correlated with the disappearance of one to three outer membrane polypeptides (molecular weights, about 80,000 to 90,000) whose production in wild-type strains was greatly enhanced under iron-l
-
6. Genome sequence of the enterobacterial phytopathogen Erwinia carotovora subsp. atroseptica and characterization of virulence factors
The bacterial family Enterobacteriaceae is notable for its well studied human pathogens, including Salmonella, Yersinia, Shigella, and Escherichia spp. However, it also contains several plant pathogens. We report the genome sequence of a plant pathogenic enterobacterium, Erwinia carotovora subsp. atroseptica (Eca) strain SCRI1043, the causative agent of soft
National Academy of Sciences.
-
7. Peroxisomal Metabolic Function Is Required for Appressorium-Mediated Plant Infection by Colletotrichum lagenarium
Peroxisomes are organelles that perform a wide range of metabolic functions in eukaryotic cells. However, their role in fungal pathogenesis is poorly understood. Here we report that ClaPEX6, an ortholog of PEX6, is required for the fungus Colletotrichum lagenarium to infect host plants. ClaPEX6 was identified in random insertional mutagenesis experiments aim
American Society of Plant Biologists.
-
8. Characterization of Rhizobacteria Associated with Weed Seedlings †
Rhizobacteria were isolated from seedlings of seven economically important weeds and characterized for potential phytopathogenicity, effects on seedling growth, and antibiosis to assess the possibility of developing deleterious rhizobacteria as biological control agents. The abundance and composition of rhizobacteria varied among the different weed species.
-
9. Analysis of the Pseudomonas solanacearum polygalacturonase encoded by pglA and its involvement in phytopathogenicity.
A major endopolygalacturonase excreted by Pseudomonas solanacearum was purified to greater than 95% homogeneity and shown to have an isoelectric point of 9.0 and a subunit molecular mass of 52 kilodaltons (kDa). The gene encoding this enzyme (pglA) was isolated from a genomic library of P. solanacearum DNA based on its expression in Escherichia coli and show
-
10. Cloning of the egl gene of Pseudomonas solanacearum and analysis of its role in phytopathogenicity.
The egl gene of Pseudomonas solanacearum was cloned on a cosmid and expressed in Escherichia coli. Restriction endonuclease mapping, transposon mutagenesis, and subclone analysis showed that the egl gene was located on a 2.7-kilobase XhoI-SalI P. solanacearum DNA fragment. Immunoabsorption experiments and sodium dodecyl sulfate-polyacrylamide gel electrophor
-
11. Fasciation induction by the phytopathogen Rhodococcus fascians depends upon a linear plasmid encoding a cytokinin synthase gene.
Rhodococcus fascians is a nocardiform bacteria that induces leafy galls (fasciation) on dicotyledonous and several monocotyledonous plants. The wild-type strain D188 contained a conjugative, 200 kb linear extrachromosomal element, pFiD188. Linear plasmid-cured strains were avirulent and reintroduction of this linear element restored virulence. Pulsed field e
-
12. sid1, a gene initiating siderophore biosynthesis in Ustilago maydis: molecular characterization, regulation by iron, and role in phytopathogenicity.
Iron uptake in Ustilago maydis is mediated by production of extracellular hydroxamate siderophores. L-Or-nithine N5-oxygenase catalyzes hydroxylation of L-ornithine, which is the first committed step of ferrichrome and ferrichrome A biosynthesis in U. maydis. We have characterized sid1, a gene coding for this enzyme, by complementation in trans, gene disrupt