Methylobacterium Sp
Mostrando 13-24 de 40 artigos, teses e dissertações.
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13. Bacterial community associated to sharpshooters (Hemiptera: Cicadellidae) insect vectors of Xylella fastidiosa / Comunidade bacteriana associada às cigarrinhas (Hemiptera:Cicadellidae), insetos vetores de Xylella fastidiosa
A Clorose Variegada dos Citros (CVC), doença que causa graves prejuízos à citricultura no estado de São Paulo, é causada pela bactéria Xylella fastidiosa que é transmitida pelas cigarrinhas Bucephalogonia xanthophis (Berg), Dilobopterus costalimai (Young), Acrogonia citrina (Marucci &Cavichioli) e Oncometopia facialis (Signoret). Durante a alimentaç�
Publicado em: 2006
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14. Sulfentrazone herbicide biotransformation in Brazilian soils. / Biotransformação do herbicida sulfentrazona em solos brasileiros.
O destino de herbicidas nos solos de regiões temperadas é muito estudado, o que não é verificado em solos de regiões tropicais embora seja necessário, uma vez que a aplicação destes compostos, pode atingir áreas frágeis do ponto de vista ambiental. O herbicida sulfentrazona destaca-se entre os herbicidas utilizados nas principais culturas do estado
Publicado em: 2006
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15. Avaliação, identificação e atividade enzimática de bactérias psicotróficas presentes no leite cru refrigerado
O processo de conservação do leite cru em temperaturas de refrigeração por períodos prolongados pode acarretar perda de qualidade do leite e, conseqüentemente, de seus produtos derivados, fato associado ao crescimento e à atividade enzimática de bactérias psicrotróficas, as quais podem se desenvolver em temperaturas abaixo de 7C. Estes microrganism
Publicado em: 2005
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16. Efeito da inoculação de bactérias diazotróficas de vida- livre e fungo micorrízico arbuscular (Glomus clarum) em arroz (Orysa sativa
O arroz é cultivado normalmente em solos deficientes em nitrogênio, exigindo que este elemento seja acrescentado à cultura através de fertilizantes nitrogenados a base de uréia e nitrato, causando problemas de poluição ambiental. A utilização da tecnologia da fixação biológica de nitrogênio (FBN) pode diminuir a aplicação destes fertilizantes,
Publicado em: 2004
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17. Controle da fusariose em plantas de pimenta-do-reino com bactérias endofíticas: sobrevivência e respostas morfofisiológicas
Oito bactérias endofíticas de plântulas de pimenta-do-reino foram testadas em casa de vegetação, objetivando controlar Fusarium solani f. sp. piperis e avaliar respostas morfofisiológicas das plantas tratadas com os agentes de controle. Plantas com quatro meses de idade tiveram o sistema radicular tratado com as suspensões bacterianas (10(9) ufc mL-1)
Pesquisa Agropecuária Brasileira. Publicado em: 2000-07
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18. Isolation and complementation analysis of 10 methanol oxidation mutant classes and identification of the methanol dehydrogenase structural gene of Methylobacterium sp. strain AM1.
A method has been developed for the direct selection of methanol oxidation mutants of the facultative methylotroph Methylobacterium sp. strain AM1 (formerly Pseudomonas sp. strain AM1). Using this direct selection technique, we have isolated mutants of Methylobacterium sp. strain AM1 that are no longer capable of growth on methanol but retain the ability to
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19. Localization of methanol dehydrogenase in two strains of methylotrophic bacteria detected by immunogold labeling.
Antibodies to methanol dehydrogenase purified from Methylobacterium sp. strain AM1 and Methylomonas sp. strain A4 were raised. The antibody preparations were used in indirect immunogold labeling studies. With this approach, methanol dehydrogenase was found to be preferentially localized to the periplasmic region of the methylotroph Methylobacterium sp. strai
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20. Methylotrophic Methylobacterium Bacteria Nodulate and Fix Nitrogen in Symbiosis with Legumes
Rhizobia described so far belong to three distinct phylogenetic branches within the α-2 subclass of Proteobacteria. Here we report the discovery of a fourth rhizobial branch involving bacteria of the Methylobacterium genus. Rhizobia isolated from Crotalaria legumes were assigned to a new species, “Methylobacterium nodulans,” within the Methylobacterium
American Society for Microbiology.
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21. Biodegradation of Nitro-Substituted Explosives 2,4,6-Trinitrotoluene, Hexahydro-1,3,5-Trinitro-1,3,5-Triazine, and Octahydro-1,3,5,7-Tetranitro-1,3,5-Tetrazocine by a Phytosymbiotic Methylobacterium sp. Associated with Poplar Tissues (Populus deltoides × nigra DN34)
A pink-pigmented symbiotic bacterium was isolated from hybrid poplar tissues (Populus deltoides × nigra DN34). The bacterium was identified by 16S and 16S-23S intergenic spacer ribosomal DNA analysis as a Methylobacterium sp. (strain BJ001). The isolated bacterium was able to use methanol as the sole source of carbon and energy, which is a specific attribut
American Society for Microbiology.
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22. Phenotypic characterization of 10 methanol oxidation mutant classes in Methylobacterium sp. strain AM1.
Twenty-five methanol oxidation mutants of the facultative methylotroph Methylobacterium sp. strain AM1 have been characterized by complementation analysis and assigned to 10 complementation groups, Mox A1, A2, A3, and B through H (D. N. Nunn and M. E. Lidstrom, J. Bacteriol. 166:582-591, 1986). In this study we have characterized each of the mutants belongin
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23. Genetic and physical analyses of Methylobacterium organophilum XX genes encoding methanol oxidation.
When allyl alcohol was used as a suicide substrate, spontaneous mutants and UV light- and nitrous acid-generated mutants of Methylobacterium organophilum XX were selected which grew on methylamine but not on methanol. There was no detectable methanol dehydrogenase (MDH) activity in crude extracts of these mutants, yet Western blots revealed that some mutants
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24. Identification of dcmR, the regulatory gene governing expression of dichloromethane dehalogenase in Methylobacterium sp. strain DM4.
The genes for dichloromethane utilization by Methylobacterium sp. strain DM4 are encoded on a 2.8-kb sequenced DNA fragment, the dcm region. This fragment contains dcmA, the structural gene of dichloromethane dehalogenase and, upstream of dcmA, a 1.5-kb region responsible for inducibility of dichloromethane dehalogenase by dichloromethane. A fragment of the