Evaluation of the floral vasculature of the Janusia, Mascagnia and Tetrapterys species as a tool to explain the decrease of floral organs in Malpighiaceae

The family Malpighiaceae is considered monophyletic, but the intra-family classification is conflicting. Analyses of floral vasculature allow the identification of reductions, connations and adnations and can even reveal evolutionary steps prior to current floral morphology. The present work analysed the floral vasculature of Janusia mediterranea, Mascagnia cordifolia and Tetrapterys chamaecerasifolia using material processed by traditional methods for light microscopy. A general pattern was observed of three bundle traces supplying each sepal and one trace per petal and stamen; Mascagnia is an exception, as its eglandular sepal has only a median trace but shares lateral traces with adjacent sepals. No dorsal traces are emitted to the carpels; however, three intercarpellary complexes are emitted that divide into six ventral bundles, supplying the ovule. Mascagnia demonstrates connation between the anterior and adjacent sepal glands; reductions of the anterior sepal glands were registered in Tetrapterys and Janusia. This work reveals two distinct processes for gland loss in non-related groups of the family that resulted in similar present appearances. Our evaluation of the number of calyx glands and the processes of glandular loss in species with less than ten glands improves our understanding of the evolution of calyx glands in Malpighiaceae. © 2013 Elsevier GmbH.

Checklist of freshwater ichthyofauna from coastal streams of Juréia-Itatins Reserve, Southeastern Brazil

The Juréia-Itatins Ecological Station (JIES) is one of the few protected areas in the state of São Paulo, which harbor a significant portion of the Atlantic forest. Although there is high diversity and endemism of fish species in this region, knowledge of the ichthyofauna in JIES is incipient. A total of 4,809 specimens belonging to six orders, 15 families and 31 species were captured during April 2009 to February 2010, using electrofishing, gillnets and traps. The family Characidae was predominant, mainly due to the abundance of freshwater species such as Astyanax ribeirae, Mimagoniates microlepis, and Hollandichthys multifasciatus. Although the estuarine regions were rarely sampled in this study, six brackish water species were captured. In this study, nine species previously unknown from JIES were discovered. Five endangered fish species, endemic to the Atlantic forest, occur at JIES, thus the presence of protected areas, as a conservation measure, is particularly relevant. © 2013 Check List and Authors.

Algunas resoluciones y decisiones recientes emanadas de órganos de las Naciones Unidas, que se ponen en conocimiento de la Comisión = Some recent resolutions and decisions adopted by United Nations organs which require to be brought to the attention of the Commission = Résolutions et décisions récemment émanées d'organismes de Nations Unies portées à la connaissance de la Commission

Presenta varias resoluciones aprobadas durante el cuadragesimosegundo periodo de sesiones de la Asamblea General de las Naciones Unidas, Nueva York, 15 septiembre-21 diciembre de 1987, que guardan relacion con la labor de la CEPAL.

Algunas resoluciones y decisiones recientes emanadas de órganos de las Naciones Unidas, que se ponen en conocimiento de la Comisión = Some recent resolutions and decisions adopted by United Nations organs which require to be brought to the attention of the Commission = Résolutions et décisions récemment émanées d'organismes des Nations Unies et portées a la connaissance de la Commission

Incluye Bibliografía

Algunas resoluciones y decisiones recientes emanadas de órganos de las Naciones Unidas, que se ponen en conocimiento de la Comisión = Some recent resolutions and decisions adopted by United Nations organs which require to be brought to the attention of the Commission = Résolutions et décisions récemment émanées d'organismes des Nations Unies et portées a la connaissance de la Commission

Incluye Bibliografía

Algunas resoluciones y decisiones recientes emanadas de órganos de las Naciones Unidas, que se ponen en conocimiento de la Comisión = Some recent resolutions and decisions adopted by United Nations organs which require to be brought to the attention of the Commission = Résolutions et décisions récemment émanées d'organismes des Nations Unies et portées à la connaissance de la Commission

Incluye Bibliografía

Algunas resoluciones y decisiones recientes emanadas de órganos de las Naciones Unidas, que se ponen en conocimiento de la Comisión = Some recent resolutions and decisions adopted by United Nations organs which should be brought to the attention of the Commission = Résolutions et décisions récemment émanées d'organismes des Nations Unies et portées à la connaissance de la Commission

Incluye Bibliografía

Algunas resoluciones y decisiones recientes emanadas de órganos de las Naciones Unidas, que se ponen en conocimiento de la Comisión = Some recent resolutions and decisions adopted by United Nations organs which should be brought to the attention of the Commission = Résolutions et decisions récemment emanées d'organismes des Nations Unies et portées a la connaissance de la Commission

Incluye Bibliografía

Some recent resolutions and decisions adopted by United Nations organs which should be brought to the attention of the Commission

Twenty-seventh session. Oranjestad, Aruba, 11-16 May 1998

Macrophage activity and histopathology of the lymphohematopoietic organs in male Wistar rats orally exposed to single or mixed pesticides

The noxious effects of low or effective dose exposure to single or mixed pesticides on macrophage activity and the lymphohematopoietic organs were investigated. Male Wistar rats were orally exposed to dichlorvos, dicofol, endosulfan, dieldrin and permethrin, either as single or combined mixtures during a 28-day study containing eight groups: one group received a semipurified diet (non-treated); two groups received a semipurified diet containing low dose mixture (dieldrin 0.025 mg/kg, endosulfan, 0.6 mg/kg, dicofol 0.22 mg/kg, dichlorvos 0.23 mg/kg, permethrin 5 mg/kg) or an effective dose mixture (dichlorvos 2.3 mg/kg, dicofol 2.5 mg/kg, endosulfan 2.9 mg/kg, dieldrin 0.05 mg/kg and permethrin 25.0 mg/kg), respectively; the other five groups received a semipurified diet containing each single pesticide in effective doses. At sacrifice, the thymus, spleen, mesenteric lymph nodes, Payer's patches and bone marrow were removed for histological analysis. Peritoneal macrophages were obtained to determine the phagocytosis and spreading indexes and tumoral necrosis factor alpha (TNF-α), nitric oxide (NO) and H2O2 production. Exposure to pesticide mixtures did not alter the percentage of macrophage phagocytosis and spreading, TNF-α production or the NO and H2O2 release when compared to the non-treated group. Neither was there any apparent evidence that a pesticide mixture at low or effective doses altered the histological structure of the lymphohematopoietic organs. The findings indicate that short-term treatment with pesticide mixtures did not induce an apparent immunotoxic effect in male Wistar rats. © 2013 Copyright Taylor and Francis Group, LLC.

Habitat monitoring and genotoxicity in Ucides cordatus (Crustacea: Ucididae), as tools to manage a mangrove reserve in southeastern Brazil

In Brazil, the state of São Paulo contains both preserved areas (Juréia-Itatins Ecological Station) and extremely impacted ones (Cubatão Municipality). This study evaluated the concentrations of five metals (Cu, Cd, Cr, Pb, and Hg) in two mangroves with different levels of anthropogenic impact and the apparent genotoxicity to Ucides cordatus. Water and sediment samples were obtained, and metal concentrations were determined with an atomic absorption spectrophotometer. The genotoxic impact was quantified based on the number of micronucleated cells per 1,000 analyzed (MN‰), using hemolymph slides stained with Giemsa. Metal concentrations in water were below the detection limit, except for lead, although no significant difference was observed between the areas (P > 0.05). Sediment from Cubatão had higher concentrations of Cd, Pb, Cr, and Cu than sediment from Juréia-Itatins (P < 0.05), but no significant differences in metal concentrations were detected among depth strata of the sediment (P > 0.05). Crabs from Cubatão had a 2.6 times higher mean frequency of micronucleated cells (5.2 ± 1.8 MN‰) than those from Juréia-Itatins (2.0 ± 1.0 MN‰; P < 0.0001). The more-polluted conditions found in the mangrove sediments of Cubatão were reflected in the micronucleus assay, demonstrating their genotoxic effect; however, genetic damage should be attributed to a synergistic effect with other kinds of pollutants previously recorded in different environments of Cubatão. U. cordatus proved to be an excellent bioindicator of mangrove pollution. This study established, for the first time, the normal frequency of MN‰ in a population of this species within an ecological station. © 2013 Springer Science+Business Media Dordrecht.

Morfoanatomia dos órgãos reprodutivos e da plântula de Epiphyllum phyllanthus (L.) Haw. (Cactaceae)

Pós-graduação em Ciências Biológicas (Biologia Vegetal) - IBRC

Efeito do bloqueio da aldosterona na remodelação cardíaca de ratos espontaneamente hipertensos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)