181 resultados para adventitious rooting
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Pós-graduação em Agronomia - FEIS
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Pós-graduação em Agronomia (Produção Vegetal) - FCAV
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Pós-graduação em Ciência e Tecnologia Animal - FEIS
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Pós-graduação em Agronomia (Horticultura) - FCA
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Tecnologias para produção de mudas de espinheira-santa: propagação vegetativa por estacas caulinares
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Pós-graduação em Agronomia (Horticultura) - FCA
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Pós-graduação em Agronomia (Horticultura) - FCA
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In this paper we propose to analyze the relationship established by Fernando Novais with Caio Prado regarding the studies about the colonization. Putting himself as his disciple, Novais exposes his conception of colonization as a deepening means and a way to overcome the way by which the author of Formação do Brasil contemporâneo understood the colonial phenomenon. This way of putting this relationship has been accepted by both the critics and supporters of Novais, thus acquiring certainty of truth. We show in this paper that by rooting his conception of colonization in Prado’s conception, Novais conceived him in a particular way: as an historian of the ‘sense of colonization’. The analysis of Prado’s concept of colonization shows, however, that this is part of his interpretation of the history of Brazil, as a whole. It follows that we can’t isolate one from the other without disturbing the comprehension of Prado’s conception. The result of our text is thus retaking the Prado’s conception in its historicity.
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Pós-graduação em Agronomia (Horticultura) - FCA
Structural alterations of the bladder induced by detrusor instability. experimental study in rabbits
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The aim of this study was to evaluate the histopathological and immunohistochemical alterations induced by detrusor instability in the bladder of rabbits submitted to partial bladder outlet obstruction. Thirty male Norfolk rabbits were divided into 2 groups, a clinical control and a group with detrusor instability. Urine culture, cystometric study, histopathological and immunohistochemical analysis were performed in all animals prior to surgery (M1) and 4 weeks after-surgery (M2). Partial obstruction (G2) resulted in a 2.5 fold increment (p < 0.05) in bladder weight when compared to control (G1). Four weeks after surgery, 93% of animals in G2 developed cystitis. Partial obstruction resulted in detrusor instability at M2 and bladder capacity was significantly increased (p < 0.05) from M1 to M2. The incidence of mild to moderate mucosal and adventitious fibrosis at M2 was higher in G2 (p < 0.05) when compared to G1. Inflammatory reaction at M2 was statistically higher (p < 0.05) in G2. There was no difference in muscular hypertrophy between M1 and M2 in G1. However, 67% of G2 bladders showed a moderate to intense muscular hypertrophy at M2. Hyperplasia of the epithelium was also increased in G2 when M1 and M2 were compared (p < 0.05). Detrusor instability induced by partial bladder outlet obstruction caused significant histopathological and immunohistochemical alterations in the bladder of rabbits.
Can hydrogen peroxide and quercetin improve production of Eucalyptus grandis x Eucalyptus urophylla?
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Vegetative propagation is considered the best choice for the rapid multiplication of plant species, however, rooting may still present difficulties. Substances, such as auxins, phenolic compounds and hydrogen peroxide, are recognized as able to improve this process. The aim of the present work was to determine if hydrogen peroxide in combination with quercetin or indole butyric acid, can modify some characteristics related to rooting and development in cuttings of Eucalyptus grandis x Eucalyptus urophylla. Cuttings were periodically evaluated at 30, 60 and 90 days according to the following criteria: height, diameter and survival percentage. After planting (90 days), a destructive evaluation was performed to determine rooting percentage, average size and number of roots. Polyamines content and polyamine oxidase activity, as biochemical markers of plant development, were determined. No statistically significant differences in height, diameter, survival and rooting percentage, root length and number of roots per cuttings were found. Treatments induced a decrease in putrescine levels and polyamine oxidase activity in roots. For absence of positive responses, the use of these substances as a treatment to improve cutting production is economically unviable.
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Planejamento e Análise de Políticas Públicas - FCHS