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HERBASPIRILLUM-LIKE BACTERIA IN BANANA PLANTS BJM
Weber,Olmar B.; Cruz,Leonardo M.; Baldani,José I.; Döbereiner,Johanna.
Diazotrophic bacteria isolated from banana plants were characterized by morphological and physiological aspects. Three different groups of these plant-bacteria could be established. Two of them showed similarity to species of the Herbaspirillum genus. The third one was different because used only a few carbon substrates and produced water diffusible compounds that fluoresced under UV light. All three bacterial groups were thin rods with mono or bipolar flagella, presented negative reaction in Gram stain, showed catalase activity, were able to reduce nitrate and grew better in semi-solid JNFb medium at 31ºC. The nitrogenase activity was detected in semi-solid N-free JNFb medium and expressed higher values when pH ranged from 6.5 to 7.0 (groups I and II) and...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Herbaspirillum; Herbaspirillum-like; Musa spp.; Microbial ecology.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000300007
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History on the biological nitrogen fixation research in graminaceous plants: special emphasis on the Brazilian experience Anais da ABC (AABC)
Baldani,José I.; Baldani,Vera L.D..
This review covers the history on Biological Nitrogen Fixation (BNF) in Graminaceous plants grown in Brazil, and describes research progress made over the last 40 years, most of whichwas coordinated by Johanna Döbereiner. One notable accomplishment during this period was the discovery of several nitrogen-fixing bacteria such as the rhizospheric (Beijerinckia fluminensis and Azotobacter paspali), associative (Azospirillum lipoferum, A. brasilense, A. amazonense) and the endophytic (Herbaspirillum seropedicae, H. rubrisubalbicans, Gluconacetobacter diazotrophicus, Burkholderia brasilensis and B. tropica). The role of these diazotrophs in association with grasses, mainly with cereal plants, has been studied and a lot of progress has been achieved in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bacterial endophytes; Diazotrophs; Semi-solid N-free medium; Inoculation; Cereals; Grass plants.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652005000300014
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Polyphasic characterization of Gluconacetobacterdiazotrophicus isolates obtained from different sugarcane varieties BJM
Guedes,Helma V.; Santos,Samuel T. dos; Perin,Liamara; Teixeira,Kátia R. dos S.; Reis,Veronica M.; Baldani,José I..
A polyphasic approach was applied to characterize 35 G. diazotrophicus isolates obtained from sugarcane varieties cultivated in Brazil. The isolates were analyzed by phenotypic (use of different carbon sources) and genotypic tests (ARDRA and RISARFLP techniques). Variability among the isolates was observed in relation to the carbon source use preference. Glucose and sucrose were used by all isolates in contrast to myo-inositol, galactose and ribose that were not metabolized. The results of the analysis showed the presence of two groups clustered at 68% of similarity. The genetic distance was higher when RISA-RFLP analysis was used. Analysis of 16S rDNA sequences from isolates showed that all of them belonged to the G. diazotrophicus species. Neither effect...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Horizontal spread; Resistance plasmids; ESBL.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400023
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Survival of endophytic diazotrophic bacteria in soil under different moisture levels BJM
Oliveira,André L.M.; Canuto,Erineudo L.; Silva,Edmilson E.; Reis,Veronica M.; Baldani,José I..
The effects of soil moisture on the survival of three diazotrophic bacteria species (Azospirillum amazonense, Gluconacetobacter diazotrophicus and Azospirillum brasilense) were tested. Soil moisture had little influence on the survival of A. brasilense, which is considered a free-living species. On the other hand, increased soil moisture extended the survival of the endophytes A. amazonense and G. diazotrophicus. These results indicate that nitrogen-fixing endophytic species are more affected by soil moisture than associative nitrogen-fixing species.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endophytic bacteria; Soil survival; Gluconacetobacter diazotrophicus; Azospirillum amazonense; Azospirillum brasilense.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300005
Registros recuperados: 4
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