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| Registros recuperados: 10 | |
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| Goldfarb,Míriam; Santana,Mateus Ferreira; Salomão,Tânia Maria Fernandes; Queiroz,Marisa Vieira de; Barros,Everaldo Gonçalves de. |
| Abstract Two retrotransposons from the superfamilies Copia and Gypsy named as Copia-LTR_SS and Gypsy-LTR_SS, respectively, were identified in the genomic bank of Sclerotinia sclerotiorum. These transposable elements (TEs) contained direct and preserved long terminal repeats (LTR). Domains related to codified regions for gag protein, integrase, reverse transcriptase and RNAse H were identified in Copia-LTR_SS, whereas in Gypsy-LTR_SS only domains for gag, reverse transcriptase and RNAse H were found. The abundance of identified LTR-Solo suggested possible genetic recombination events in the S. sclerotiorum genome. Furthermore, alignment of the sequences for LTR elements from each superfamily suggested the presence of a RIP (repeat-induced point mutation)... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Phytopathogens; Retrotransposons; Transposable elements. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000300426 |
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| Coelho,Irene da Silva; Queiroz,Marisa Vieira de; Costa,Maurício Dutra; Kasuya,Maria Catarina Megumi; Araújo,Elza Fernandes de. |
| The aim of this work was to study the standardization of conditions to obtain and regenerate Epulorhiza repens and Ceratorhiza sp. protoplasts. For E. repens, the largest number of protoplasts (8.0 × 10(6) protoplasts/mL) was obtained in 0.6 M KCl, using 15 mg/mL of Lysing Enzymes, and 2-day-old fungal mycelium. When 0.5 M sucrose was used as osmotic stabilizer, the highest frequency of regeneration was achieved (8.5 %); 80.0 % of protoplasts were nucleated, and 20.0 % anucleated. For Ceratorhiza sp., the largest number of protoplasts (4.0 × 10(7) protoplasts/mL) was achieved in 0.6 M NaCl, when 15 mg/mL of Lysing Enzymes and 15mg/mL of Glucanex, with 2-day-old fungal mycelium were used. The highest frequency of regeneration was 6.7 % using 0.5 M sucrose... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ceratorhiza; Epulorhiza; Molecular biology; Protoplast; Regeneration. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100019 |
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| Costa,Leonardo Emanuel de Oliveira; Queiroz,Marisa Vieira de; Borges,Arnaldo Chaer; Moraes,Celia Alencar de; Araújo,Elza Fernandes de. |
| The common bean is one of the most important legumes in the human diet, but little is known about the endophytic bacteria associated with the leaves of this plant. The objective of this study was to characterize the culturable endophytic bacteria of common bean (Phaseolus vulgaris. leaves from three different cultivars (Vermelhinho, Talismã, and Ouro Negro) grown under the same field conditions. The density of endophytic populations varied from 4.5 x 10² to 2.8 x 10³ CFU g-1 of fresh weight. Of the 158 total isolates, 36.7% belonged to the Proteobacteria, 32.9% to Firmicutes, 29.7% to Actinobacteria, and 0.6% to Bacteroidetes. The three P. vulgaris cultivars showed class distribution differences among Actinobacteria, Alphaproteobacteria and Bacilli. Based... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endophytic bacteria; Common bean; Phaseolus vulgaris; 16S rDNA; Diversity indices. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400041 |
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| Varavallo,Maurilio Antonio; Queiroz,Marisa Vieira de; Lana,Taís Guimarães; Brito,Admilson Toscano Ribeiro de; Gonçalves,Daniel Bonoto; Araújo,Elza Fernandes de. |
| Protoplast fusion between complementary auxotrophic and morphological mutant strains of Penicillium griseoroseum and P. expansum was induced by polyethylene glycol and calcium ions (Ca2+). Fusant strains were obtained in minimal medium and a prototrophic strain, possibly diploid, was chosen for haplodization with the fungicide benomyl. Different recombinant strains were isolated and characterized for occurrence of auxotrophic mutations and pectinolytic enzyme production. The fusant prototrophic did not present higher pectinase production than the parental strains, but among 29 recombinants analyzed, four presented enhanced enzyme activities. The recombinant RGE27, which possesses the same auxotrophic and morphologic mutations as the P. griseoroseum... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Protoplast fusion; Pectinases; Penicillium. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100011 |
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| Registros recuperados: 10 | |
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