Paulo S. T. Brioso

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Hibiscus rosa-sinensis is a valuable ornamental species widely planted in Brazil. Many plants are affected by witches' broom disease, which is characterized by excessive axillary branching, abnormally small leaves, and deformed flowers, symptoms that are characteristic of diseases attributed to phytoplasmas. A phytoplasma was detected in diseased Hibiscus(More)
Gluconacetobacter diazotrophicus Pal5 is an endophytic diazotrophic bacterium that lives in association with sugarcane plants. It has important biotechnological features such as nitrogen fixation, plant growth promotion, sugar metabolism pathways, secretion of organic acids, synthesis of auxin and the occurrence of bacteriocins. Gluconacetobacter(More)
Sicana odorifera also known as cassabanana, sikana or musk cucumber, is naturally grown from Mexico to Brazil and the west Indies. Fruits are edible, the pulp and the seeds have a medicinal use, and the whole plant is used as an ornamental. In the State of Rio de Janeiro, Brazil, naturally diseased sikana plants were observed, for the first time, with(More)
Nice Shindo 1, Roberto Krengiel 1, Paulo S.T. Brioso 2, Ana Carolina P. Vicente 3, Mauro Weyne 1, Dulce E. de Oliveira 1,4, and Benedikt Timmerman I 1Departamento de Gen&ica, Universidade Federal do Rio de Janeiro, CP68011, 21944 Rio de Janeiro, Brazil (* author for correspondence); 2 Universidade Federal Rural do Rio de Janeiro, Rio de Janeiro, Brazil," 3(More)
The biflavonoid 2'',3''-diidroochnaflavone ( 1), isolated from the leaves of Luxemburgia nobilis, was cytotoxic to murine Ehrlich carcinoma (IC50 = 17.2 microM) and human leukemia K562 cells (IC50 = 89.0 microM) in a concentration-dependent manner in 45 h cell culture. The acetyl (1a) and methyl (1b) derivatives of 1 were not cytotoxic to these tumour cells(More)
Departamento de Genetica, Universidade Federal do Rio de Janeiro, CP 6801 1, CEP 21944, Rio de Janeiro, Brasil (N.S., R.K., D.E.d.O.); Departamento de Fitopatologia, Universidade Federal Rural do Rio de Janeiro, CP 23851, Rio de Janeiro, Brasil (P.S.T.B.); Departamento de Genetica, Fundagco Oswaldo Cruz, CP 926, Rio de laneiro, Brasil (A.C.P.V.);(More)
Andean potato mottle virus (APMV), an endemic South American comovirus, has a bipartite genome consisting of two plus-strand RNA molecules (M and B RNA). We have cloned the 3' half of the B RNA and identified the complete sequence of the putative APMV RNA polymerase. The RNA polymerase gene is part of a large polyprotein-encoding open reading frame. The(More)
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