Symbionts
Mostrando 13-24 de 201 artigos, teses e dissertações.
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13. Caracterização molecular de isolados de nematóides entomopatogênicos, Heterorhabditis spp. e seus simbiontes, Photorhabdus spp., provenientes de Monte Negro, RO. / Molecular characterization of entomopathogenic nematodes isolates, Heterorhabditis spp. and its bacterial symbionts, Photorhabdus spp., from Monte Negro, RO, Brazil.
Os isolados de nematóides entomopatogênicos provenientes do solo de Monte Negro (RO) receberam o prefixo LPP seguido de um número sequencial. As linhagens de bactérias simbiontes receberam o prefixo MN como referência ao local de isolamento. As culturas dos isolados de nematóides entomopatogênicos LPP foram estabelecidas em nosso laboratório, sendo n
Publicado em: 2010
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14. Óleo essencial de eucalipto como bioestimulador da micorrização e do estabelecimento de mudas de eucalipto e sibipiruna em solo contaminado com cobre / Essential oil of eucalyptus as biostimulator of mycorrhiza and the eucalyptus and sibipiruna tree establishment in soil contaminated with copper
Ectomycorrhizal fungi (fECM) combined with the plant root system improve the absorption of water and nutrients, providing great plant growth, especially in environments with nutritional deficiency or degraded. Due to the fECM and plants live in mutualistic association, allows the fungal symbionts to be benefit, or at least tolerate, the secondary metabolites
Publicado em: 2010
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15. Physiological traits of the symbiotic bacterium Teredinibacter turnerae isolated from the mangrove shipworm Neoteredo reynei
Nutrition in the Teredinidae family of wood-boring mollusks is sustained by cellulolytic/nitrogen fixing symbiotic bacteria of the Teredinibacter clade. The mangrove Teredinidae Neoteredo reynei is popularly used in the treatment of infectious diseases in the north of Brazil. In the present work, the symbionts of N. reynei, which are strictly confined to the
Genetics and Molecular Biology. Publicado em: 10/07/2009
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16. Do Archaea and bacteria co-infection have a role in the pathogenesis of chronic chagasic cardiopathy?
Chronic cardiopathy (CC) in Chagas disease is a fibrotic myocarditis with C5b-9 complement deposition. Mycoplasma and Chlamydia may interfere with the complement response. Proteolytic enzymes and archaeal genes that have been described in Trypanosoma cruzi may increase its virulence. Here we tested the hypothesis that different ratios of Mycoplasma, Chlamydi
Memórias do Instituto Oswaldo Cruz. Publicado em: 2009-07
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17. Efeito de fungos micorrízicos arbusculares sobre o parasitismo do nematóide das galhas em plantas de bananeira micropropagadas / Effect of arbuscular mycorrhizal fungi on the root-knot nematode parasitism in micropropagated banana plantlets
Banana is one of the most economically important fruits crops and its micropropagation has been stimulated by improving seedlings quality. However, they are sensitive to many pests and pathogens, including nematodes. The arbuscular mycorrhizal fungi (AMF) are symbionts associated to the roots, favoring the growth and the development of plants, also being abl
Publicado em: 2008
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18. Taxonomia e diversidade genética de rizóbios microssimbiontes de distintas leguminosas com base na análise polifásica (Box-PCR e 16 S RNAr) e na metodologia de MLSA
The term rhizobia is generically applied to bacteria capable of fixing the atmospheric nitrogen (N2) and converting it to a form assimilable by the plant, when in symbiosis with plants of the Leguminosae family. However, besides their ecological and economic importance, the rhizobia have not been subject of many studies. Based on the data obtained with t
Publicado em: 2008
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19. Análise da variabilidade genética e Avaliação da fixação biológica de nitrogênio entre acessos de amendoim (Arachis hypogaea L.) / Analisys of genetic variability and assessment of biological nitrogen fixation among peanut (Arachis hypogaea L.) accessions
The peanut is a crop worldwide cultivated and it presents a high potential to biological nitrogen fixation (BNF). However peanut is considered a very promiscuous crop, what makes necessary a hard work of selection of rhizobial efficient and competitive strains to produce inoculants for this crop. The selection of an efficient association depends of the knowl
Publicado em: 2006
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20. Arbuscular mycorrhizal community in a permanent pasture and development of species-specific primers for detection and quantification of two AM fungi
Arbuscular mycorrhizal (AM) fungi are a group of symbionts that occupy different niches during their life cycle in roots and in the rhizosphere. They occur in soil as spores, hyphae and other propagules such as colonised root fragments. During the interaction with the plant roots a bidirectional transfer of mineral nutrients and carbon occurs, frequently ens
Publicado em: 2005
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21. Analysis of Plant Gene Expression Responses to the Pathogen and Natural Genetic Engineer Agrobacterium tumefaciens
Agrobacterium tumefaciens genetically transforms its natural plant host and other eukaryotic cells, representing both an intriguing pathogen and a vehicle for genetic engineering. Host responses to this bacterium have not been studied extensively in the past, although this understanding is critical for both practical applications in biotechnology and insight
Publicado em: 2004
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22. Subcuticular bacteria from the brittle star Ophiactis balli (Echinodermata: Ophiuroidea) represent a new lineage of extracellular marine symbionts in the alpha subdivision of the class Proteobacteria.
Many species of echinoderms, in all five extant classes, contain subcuticular bacterial symbionts (SCB). The role of these extracellular symbionts and the nature of the relationship remain unclear. We have sequenced 16S rRNA genes from symbionts to determine their phylogenetic affinities. Symbionts of an ophiuroid, Ophiactis balli, appear closely related to
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23. Pea aphid symbiont relationships established by analysis of 16S rRNAs.
The pea aphid (Acyrthosiphon pisum Harris) harbors two morphologically distinct procaryotic intracellular symbionts. The genes for the 16S rRNA from these symbionts have been cloned and sequenced. Comparisons with sequences of 16S rRNAs from selected procaryotes indicate that the two symbionts are evolutionarily distinct from each other and are members of th
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24. Phylogenetic relationships of chemoautotrophic bacterial symbionts of Solemya velum say (Mollusca: Bivalvia) determined by 16S rRNA gene sequence analysis.
The protobranch bivalve Solemya velum Say (Mollusca: Bivalvia) houses chemoautotrophic symbionts intracellularly within its gills. These symbionts were characterized through sequencing of polymerase chain reaction-amplified 16S rRNA coding regions and hybridization of an Escherichia coli gene probe to S. velum genomic DNA restriction fragments. The symbionts