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| Monteiro,Rose A.; Schmidt,Maria A.; Baura,Valter A. de; Balsanelli,Eduardo; Wassem,Roseli; Yates,Marshall G.; Randi,Marco A.F.; Pedrosa,Fábio O.; Souza,Emanuel M. de. |
| The bacterium Herbaspirillum seropedicae is an endophytic diazotroph found in several plants, including economically important poaceous species. However, the mechanisms involved in the interaction between H. seropedicae and these plants are not completely characterized. We investigated the attachment of Herbaspirillum to maize roots and the invasion of the roots by this bacterium using H. seropedicae strain SMR1 transformed with the suicide plasmid pUTKandsRed, which carries a mini-Tn5 transposon containing the gene for the Discosoma red fluorescent protein (Dsred) constitutively expressed together with the kanamycin resistance gene. Integration of the mini-Tn5 into the bacterial chromosome yielded the mutant H. seropedicae strain RAM4 which was capable of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Confocal microscopy; Diazotroph; Endophytic; Herbaspirillum seropedicae. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000500021 |
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| Leite,Maria C. B. S.; Farias,Andreza R. B. de; Freire,Fernando J.; Andreote,Fernando D.; Kuklinsky-Sobral,Júlia; Freire,Maria B. G. S.. |
| ABSTRACT The selection of salinity tolerant bacteria may provide greater promotion of plant growth in soils with salt stress. This study aimed to isolate and select bacterial isolates of sugarcane, tolerant to salinity and plant growth promoters, and assess genetic diversity. To do so, endophytic root and rhizosphere of sugarcane, were isolated in culture medium with and without NaCl. The bacterial population density, the potential for biological nitrogen fixation (BNF), production of indole acetic acid (IAA), inorganic phosphate solubilization and quorum sensing molecule production were evaluated. Furthermore, the genetic diversity was assessed by Denaturing Gradient Gel Electrophoresis (DGGE) of nifH. Salinity tolerance tests were also conducted. There... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endophytic; Genetic variability; Plant growth promotion. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662014001300073 |
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| Martínez-Rodríguez,Julia del C.; Mora-Amutio,Marcela De la; Plascencia-Correa,Luis A.; Audelo-Regalado,Esmeralda; Guardado,Francisco R.; Hernández-Sánchez,Elías; Peña-Ramírez,Yuri J.; Escalante,Adelfo; Beltrán-García,Miguel J.; Ogura,Tetsuya. |
| Agave tequilana Weber var. 'Azul' is grown for the production of tequila, inulin and syrup. Diverse bacteria inhabit plant tissues and play a crucial role for plant health and growth. In this study culturable endophytic bacteria were extracted from leaf bases of 100 healthy Agave tequilana plants. In plant tissue bacteria occurred at mean population densities of 3 million CFU/g of fresh plant tissue. Three hundred endophytic strains were isolated and 16s rDNA sequences grouped the bacteria into eight different taxa that shared high homology with other known sequences. Bacterial endophytes were identified as Acinectobacter sp., A. baumanii, A. bereziniae, Cronobacter sakazakii, Enterobacter hormaechei, Bacillus sp. Klebsiella oxytoca, Pseudomonas sp.,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agave tequilana; Endophytic; Fusarium oxysporum; Pathogen inhibition. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400025 |
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| Ribeiro,Vitória Palhares; Marriel,Ivanildo Evódio; Sousa,Sylvia Morais de; Lana,Ubiraci Gomes de Paula; Mattos,Bianca Braz; Oliveira,Christiane Abreu de; Gomes,Eliane Aparecida. |
| Abstract Bacterial endophytes are considered to have a beneficial effect on host plants, improving their growth by different mechanisms. The objective of this study was to investigate the capacity of four endophytic Bacillus strains to solubilize iron phosphate (Fe-P), produce siderophores and indole-acetic acid (IAA) in vitro, and to evaluate their plant growth promotion ability in greenhouse conditions by inoculation into pearl millet cultivated in a P-deficient soils without P fertilization, with Araxá rock phosphate or soluble triple superphosphate. All strains solubilized Fe-P and three of them produced carboxylate-type siderophores and high levels of IAA in the presence of tryptophan. Positive effect of inoculation of some of these strains on shoot... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endophytic; Indole-acetic acid; Phosphate solubilizing; Plant growth promotion; Siderophores. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000500040 |
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| Garcia,Fabio Ribeiro; Cavalcante,Felipe Lira de Sá; Souza,Robson Antonio de; Houllou,Laureen Michelle. |
| ABSTRACT: One of the significant obstacles to the growth of sugarcane production is the infection by phytopathogens, mainly by the bacterium Leifsonia xyli subsp. xyli (Lxx) causal agent of Ratoon stunting disease. Thus, this research aimed to evaluate the effects of kasugamycin on the in vitro growth of sugarcane, as well as its effect on the bacterium Lxx. Explants of strain SP791011 from sugarcane were inoculated in MS culture medium supplemented with the antimicrobial kasugamycin at concentrations of 0.00; 0.87; 1.08; 1.74 and 3.48 mL.L-1, where they remained for 30 days. After this period, the survival rate, shoot number per explant, height of the explants, phytomass, dry phytomass and phytosanitary were evaluated based on the presence of genomic DNA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Micropropagation; Endophytic; Ratoon stunting disease. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000800404 |
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