Diazotrophy
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Água como veículo de preservação de isolados de bactérias diazotróficas.
1999
Seropédica: EMBRAPA-CNPAB. Publicado em: 2011
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2. Infecção e colonização de raízes de arroz de sequeiro por bactérias diazotróficas endofíticas.
1999
Seropédica: EMBRAPA-CNPAB. Publicado em: 2011
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3. Turfa como veículo para inoculação de bactérias diazotróficas na cultura de arroz.
2001
Seropédica: Embrapa Agrobiologia. Publicado em: 2011
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4. Ocorrência de bactérias do gênero Azospirillum spp. associadas a gramíneas forrageiras no Pantanal da Nhecolândia.
2000
Seropédica: Embrapa Agrobiologia. Publicado em: 2011
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5. Uma nova estratégia para isolar Gluconacetobacter diazotrophicus de plantas de cana-de-açúcar.
1999
Seropédica: EMBRAPA-CNPAB. Publicado em: 2011
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6. pó de forno de aciaria elétrica na microbiota do solo e no crescimento de soja.
Devido à grande produção de resíduos de siderurgia, tem sido indicado seu aproveitamento na agricultura como fonte alternativa de micronutrientes. O objetivo deste trabalho foi avaliar o efeito da aplicação do pó de forno de aciaria elétrica na microbiota de solos e sua potencialidade no fornecimento de micronutrientes à soja. O experimento foi real
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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7. Diazotrophy and Nitrogenase Activity in the Archaebacterium Methanosarcina barkeri 227
Nitrogen fixation (diazotrophy) has recently been demonstrated in several methanogenic archaebacteria. To compare the process in an archaebacterium with that in eubacteria, we examined the properties of diazotrophic growth and nitrogenase activity in Methanosarcina barkeri 227. Growth yields with methanol or acetate as a growth substrate were significantly l
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8. Acetylene reduction (dinitrogen fixation) by clinical isolates of Klebsiella pneumoniae.
Freshly isolated clinical strains of Klebsiella were tested for the ability to fix dinitrogen by the acetylene reduction assay. Ability to detect this trait was markedly affected by cultural conditions. When the test was run at 37 degrees C in the presence of yeast extract (50 mg/liter), only 1.6% of the organisms were diazotrophs, whereas this temperature w
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9. Excretion of ammonium by a nifL mutant of Azotobacter vinelandii fixing nitrogen.
A mutation in the gene upstream of nifA in Azotobacter vinelandii was introduced into the chromosome to replace the corresponding wild-type region. The resulting mutant, MV376, produced nitrogenase constitutively in the presence of 15 mM ammonium. When introduced into a nifH-lacZ fusion strain, the mutation permitted beta-galactosidase production in the pres
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10. Differential Responses of Nitrogen-Fixing Cyanobacteria to Salinity and Osmotic Stresses
Two nitrogen-fixing Anabaena strains were found to be differentially tolerant to salinity and osmotic stresses. Anabaena torulosa, a brackish-water, salt-tolerant strain, was relatively osmosensitive. Anabaena sp. strain L-31, a freshwater, salt-sensitive strain, on the other hand, displayed significant osmotolerance. Salinity and osmotic stresses affected n
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11. Interactions between Nitrogen Fixation and Osmoregulation in the Methanogenic Archaeon Methanosarcina barkeri 227
The nitrogenase enzyme complex of Methanosarcina barkeri 227 was found to be more sensitive to NaCl than previously studied molybdenum nitrogenases are, with total inhibition of activity occurring at 190 mM NaCl, compared with >600 mM NaCl for Azotobacter vinelandii and Clostridium pasteurianum nitrogenases. Na+ and K+ had equivalent effects, whereas Mg2+ wa
American Society for Microbiology.
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12. Endophytic Colonization of Rice by a Diazotrophic Strain of Serratia marcescens
Six closely related N2-fixing bacterial strains were isolated from surface-sterilized roots and stems of four different rice varieties. The strains were identified as Serratia marcescens by 16S rRNA gene analysis. One strain, IRBG500, chosen for further analysis showed acetylene reduction activity (ARA) only when inoculated into media containing low levels o
American Society for Microbiology.