158 resultados para Components phenols of CNSL


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pyrostegia venusta (Ker-Gawl.) Miers (Bignoniaceae) is a species with a wide distribution in nearly all of Southern and Southeastern Brazil, has long been used in folk medicine and is considered an invasive plant. The phytotoxic potential of a hydroalcoholic extract of the flowers of P. venusta was evaluated by the germination (pre and post-emergence) and the phytotoxicity bioassays (mitotic index) on the test plant Lactuca sativa (Asteraceae) (lettuce). A phytochemical screening was performed to identify the components of the floral extract. Different concentrations of the extract caused changes in the germination parameters, the root length and the mitotic index. The phytochemical screening indicated the presence of substances such as terpenes, sterols, flavonoids, tannins and saponins, which are compounds that may be associated directly with the results of cytotoxicity and phytotoxicity observed. P. venusta has allelochemical components capable of impairing the germination and root growth of lettuce.

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Pós-graduação em Agronomia (Produção Vegetal) - FCAV

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Agronomia (Ciência do Solo) - FCAV

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With the objective of gathering technical data about soybean cultivars performance in Botucatu, state of São Paulo, Brazil, an experiment was conducted to evaluate seventeen genotypes. The experiment was conducted during the Summer seasons of 2002/03, 2003/04, and 2004/05. The experiment was set in the field according to a complete block design with four repetitions. The soybean cultivars were ‘Embrapa 48’, ‘BRS 132’. ‘BRS 183’, ‘BRS 212’, ‘IAC 22’, and ‘IAC 23’ (early cycled varieties), ‘BRS 133’, ‘BRS 154’, ‘BRS 156’, ‘BRS 184’, ‘BRS 214’, ‘IAC 18’, and ‘IAC 24’ ( semi early varieties), and ‘BRS 134’, ‘BRS 215’, ‘IAC 8.2’, and ‘IAC 19’ (medium cycled varieties ). All the varieties, during the three cropping years, showed adequate plant height and first pod height of insertion for mechanical harvest. Among the production components, mass of 100 grains showed the highest variability. Cultivar ‘BRS 154’ (medium cycle) showed the highest variation in mass of 100 grains and was also the highest yielding variety in the cropping year of 2004/05. The majority of the cultivars yielded above 3,000 kg ha -1 during the cropping years of 2002/03 and 2004/05. The best yielding performance during the three cropping years were displayed by cultivars ‘IAC 22’ (early cycle), ‘BRS 133’ and ‘BRS 156’ ( both semi early cycled varieties).

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)