GERMINAÇÃO DE SEMENTES Platymiscium floribundum VOG. (FABACEAE) SOB A INFLUÊNCIA DA LUZ E TEMPERATURAS

 Platymiscium floribundum Vog., a forest species belonging to the family Fabaceae, has great potential for economic exploitation and can be used both in landscape and in reforestation, in the restoration of degraded areas and permanent preservation. Given the importance of its work, it was aimed to study the influence of light and temperature on seed germination of Platymiscium floribundum. We evaluated the germination and vigor under temperatures of constant 25 and 30ºC and  alternated 20-30°C in different light regimes: White (LB), green (LV), red-far (LVD), red (LV) and absence light (A). The experimental design was completely randomized in a factorial 3 x 5 with four replications of 25 seeds. The variables analyzed were: germination, first count of germination, germination speed index (IGV), length and seedling dry weight (root length, shoot length of seedlings). The seeds of Platymiscium floribundum express their maximum force in illuminated environment independent of the temperature.Platymiscium floribundum Vog., uma espécie florestal pertencente à família Fabaceae, apresenta grande potencial para exploração econômica e pode ser utilizada tanto no paisagismo como em reflorestamentos, na recuperação de áreas degradadas e de preservação permanente. Diante de sua importância, o trabalho teve como objetivo estudar a influência da luz e temperaturas na germinação de sementes de Platymiscium floribundum. Avaliou-se a germinação e vigor das sementes sob temperaturas de 25 e 30ºC constantes e 20-30ºC alternada em diferentes regimes de luz: branca (LB), verde (LV), vermelha-distante (LVD), vermelha (LV) e ausência de luz (A). O delineamento experimental foi inteiramente ao acaso, em esquema fatorial 3 x 5, com quatro repetições de 25 sementes. As variáveis analisadas foram: germinação, primeira contagem de germinação, índice de velocidade de germinação (IVG), comprimento e massa seca de plântulas (raiz e altura da parte aérea). As sementes de Platymiscium floribundum expressam seu máximo vigor em ambiente iluminado independentemente da temperatura

Superação de dormência e vigor em sementes de Fava-d’Anta (Dimorphandra gardneriana Tulasne)

The objective of this study was to evaluate the effciency of different methods of overcoming of dormancy in Dimorphandra gardneriana Tulasne seeds, aiming to provide technical and scientifc knowledge to enable the creation of a protocol for germination. In an experiment conducted at ‘Laboratório de Análise de Sementes’, Centro de Ciências Agrárias, Universidade Federal da Paraíba (CCA-UFPB), in a completely randomized experimental design, seeds of fava d’anta were subjected to the following treatments: control consisting of non-carifed seeds mechanically scarifed with sandpaper Nº 120, mechanically scarifed seeds with sandpaper and soaked in distilled water for 6, 12, 18 and 24 hours, seeds subjected to blunt the region opposite to the hilum of nail with pliers, seeds subjected to blunt the region opposite to the hilum of nail with pliers and put on immersion in water distilled for 6, 12, 18 and 24 hours, chemical scarifcation with concentrated sulfuric acid for 5, 10 and 15 minutes. After the treatments, the seeds were tested for germination and vigor (emergence, speed of germination and emergence, length and dry weight of roots and hypocotyl). Mechanical scarifcation with sandpaper and lopping followed by immersion in distilled water for six hours favor the percentage of seed germination and the seedling emergence of Dimorphandra gardneriana and treatments using sulfuric acid dramatically reduced the strength of these seeds.O objetivo neste trabalho foi avaliar a eficiência de diferentes métodos para a superação da dormência em sementes Dimorphandra gardneriana Tulasne, visando fornecer conhecimentos técnico-científicos que permitam a criação de um protocolo de germinação. Em um experimento realizado no Laboratório de Análise de Sementes do Centro de Ciências Agrárias da Universidade Federal da Paraíba (CCA-UFPB), em delineamento experimental inteiramente ao acaso, as sementes de D. gardneriana foram submetidas aos seguintes tratamentos: testemunha que consistiu de sementes não escarificadas, sementes escarificadas mecanicamente com lixa n° 120, sementes escarificadas mecanicamente com lixa e submetidas à embebição em água destilada por 6, 12, 18 e 24 horas, sementes submetidas ao desponte na região oposta ao hilo com alicate de unha, sementes submetidas ao desponte na região oposta ao hilo com alicate de unha e postas em embebição em água destilada por 6, 12, 18 e 24 horas, escarificação química com ácido sulfúrico concentrado por 5, 10 e 15 minutos. Após a aplicação dos tratamentos as sementes foram submetidas a testes de germinação e vigor (emergência, índice de velocidade de germinação e de emergência, comprimento e massa seca de hipocótilo e raízes). A escarificação mecânica com lixa e o desponte seguidos de imersão em água destilada por seis horas favorecem a porcentagem de germinação de sementes e emergência de plântulas de Dimorphandra gardneriana, e os tratamentos utilizando ácido sulfúrico reduziram drasticamente o vigor destas sementes

Clínica Psicodinâmica do Trabalho: a prática em diversos contextos de trabalho

This study aims to present clinical practice under various work contexts, recently held from North to South of Brazil. The psychodynamic clinic of labour is characterized by the analysis of mental processes mobilized by the meeting between the subject and the impositions generated by the work organization five clinical practices are presented that are developed in laboratories of labor psychodynamics at the University of Brasilia (DF), Federal University of Amazonas and Federal University of Rio Grande do Sul, Brazil. These practices provide a systematic methodology in labour clinic resulting in unique practices depending on the sociocultural and institutional reality of each studied category. The reported experiences show the demand diversity and the importance of the clinic listening of work suffering. The reports show that the distance between the prescribed and the true rules which triggers the suffering is also the researchers' tasks, requiring mobilization and creation of suitable alternatives in each reality. It also indicates the need for future studies to articulate other fields that contribute to deepen the use of listening devices. It seems a powerful reference for psychoanalysis. This articulation contributes to suffering's analytical listening and supports a construction proposal of an Analytical Clinic of Labour

Clínica Psicodinâmica do Trabalho: a prática em diversos contextos de trabalho

This study aims to present clinical practice under various work contexts, recently held from North to South of Brazil. The psychodynamic clinic of labour is characterized by the analysis of mental processes mobilized by the meeting between the subject and the impositions generated by the work organization five clinical practices are presented that are developed in laboratories of labor psychodynamics at the University of Brasilia (DF), Federal University of Amazonas and Federal University of Rio Grande do Sul, Brazil. These practices provide a systematic methodology in labour clinic resulting in unique practices depending on the sociocultural and institutional reality of each studied category. The reported experiences show the demand diversity and the importance of the clinic listening of work suffering. The reports show that the distance between the prescribed and the true rules which triggers the suffering is also the researchers' tasks, requiring mobilization and creation of suitable alternatives in each reality. It also indicates the need for future studies to articulate other fields that contribute to deepen the use of listening devices. It seems a powerful reference for psychoanalysis. This articulation contributes to suffering's analytical listening and supports a construction proposal of an Analytical Clinic of Labour

Clínica Psicodinâmica do Trabalho: a prática em diversos contextos de trabalho

O objetivo deste estudo é apresentar práticas clínicas, em diversos contextos de trabalho, realizadas recentemente de norte a sul do Brasil. A clínica psicodinâmica do trabalho caracteriza-se pela análise dos processos psíquicos mobilizados pelo encontro entre o sujeito e as imposições geradas pela organização do trabalho. São apresentadas cinco práticas clínicas desenvolvidas nos Laboratórios de Psicodinâmica do Trabalho da Universidade de Brasília e da Universidade Federal do Amazonas da Universidade Federal do Rio Grande do Sul. São práticas que sistematizam a metodologia em clínica do trabalho, apresentando especificidades e singularidades, a depender da realidade sociocultural e institucional de cada categoria estudada. As experiências relatadas evidenciam a diversidade de demandas e a importância da escuta clínica do sofrimento no trabalho. Os relatos evidenciam que a distância entre o prescrito e o real, que desencadeia o sofrimento, também está presente no fazer dos pesquisadores, demandando mobilização e criação de alternativas adequadas a cada realidade. Ainda, indica como perspectiva para futuros estudos, a necessidade de articular outros campos que contribuam para aprofundar o uso dos dispositivos de escuta. Apresenta-se como um referencial potente para essa referência a psicanálise. Essa articulação contribui para uma escuta analítica do sofrimento e sustenta uma proposta de construção de uma Clínica Analítica do Trabalho.Palavras-chave: Clínica do trabalho; psicodinâmica do trabalho; espaço de discussãoABSTRACTThis study aims to present clinical practice under various work contexts, recently held from North to South of Brazil. The psychodynamic clinic of labour is characterized by the analysis of mental processes mobilized by the meeting between the subject and the impositions generated by the work organization five clinical practices are presented that are developed in laboratories of labor psychodynamics at the University of Brasilia (DF), Federal University of Amazonas and Federal University of Rio Grande do Sul, Brazil. These practices provide a systematic methodology in labour clinic resulting in unique practices depending on the sociocultural and institutional reality of each studied category. The reported experiences show the demand diversity and the importance of the clinic listening of work suffering. The reports show that the distance between the prescribed and the true rules which triggers the suffering is also the researchers' tasks, requiring mobilization and creation of suitable alternatives in each reality. It also indicates the need for future studies to articulate other fields that contribute to deepen the use of listening devices. It seems a powerful reference for psychoanalysis. This articulation contributes to suffering's analytical listening and supports a construction proposal of an Analytical Clinic of Labour.Keywords: Labour Clinic; labour psychodynamics; discussion spac

The complete genome sequence of Chromobacterium violaceum reveals remarkable and exploitable bacterial adaptability

Chromobacterium violaceum is one of millions of species of free-living microorganisms that populate the soil and water in the extant areas of tropical biodiversity around the world. Its complete genome sequence reveals (i) extensive alternative pathways for energy generation, (ii) ≈500 ORFs for transport-related proteins, (iii) complex and extensive systems for stress adaptation and motility, and (iv) wide-spread utilization of quorum sensing for control of inducible systems, all of which underpin the versatility and adaptability of the organism. The genome also contains extensive but incomplete arrays of ORFs coding for proteins associated with mammalian pathogenicity, possibly involved in the occasional but often fatal cases of human C. violaceum infection. There is, in addition, a series of previously unknown but important enzymes and secondary metabolites including paraquat-inducible proteins, drug and heavy-metal-resistance proteins, multiple chitinases, and proteins for the detoxification of xenobiotics that may have biotechnological applications

TRATAMENTOS PARA SUPERAR A DORMÊNCIA DE SEMENTES DE Luffa operculata (L.) Cogniaux

The present study aimed at evaluating the effect of different treatments to overcome dormancy of Luffa operculata seeds. The tests were conducted at the Laboratory of Seed Analyzes of the Federal Univer-sity of Paraíba, in the city of Areia-PB. The seeds of L. operculata were submitted to scarification treatments with sandpaper, cutting with scissors, imbibition in cold water, immersion in hot water and immersion in sulfu-ric acid. In evaluating the effect of treatment, was determined percentage, first count and germination index speed as well as length and dry mass of roots and hypocotyl. The mechanical scarification with sandpaper and cutting with scissors with or without imbibition in cold water for 12 hours are recommended for overcoming dormancy of L. operculata seeds

Substrate in the emergence and initial growth of seedlings of Caesalpinia pulcherrima

ABSTRACT: Caesalpinia pulcherrima is an exotic species belongs to the Fabaceae family commonly known as flamboyant-mirim, and widely used for urban forestry. This study aimed to evaluate the effect of different substrates on the emergence and early seedlings growth of C. pulcherrima . The experiment was conducted in a greenhouse belonging to the Centro de Ciências Agrárias, Universidade Federal da Paraíba. The experimental design was completely randomized and treatments had 14 substrates: sand, vegetable soil, vermiculite, wood dust, carbonized rice straw, vegetable soil + sand 1:1, sand + wood dust 1:1, sand + carbonized rice straw 1:1, earth + wood dust 1:1, vegetable soil + carbonized rice straw 1:1, vermiculite + sand 1:1, vermiculite + wood dust 1:1, vermiculite + earth 1:1 and vermiculite + carbonized rice straw 1:1. Evaluation of the effect of the treatments was through the following determinations: percentage of emergency, first count, index of germination speed, length and dry weight of roots and shoots. The vermiculite, vegetable soil + sand 1:1, vermiculite + sand 1:1, vermiculite + saw dust 1:1, are suitable for emergence and early growth of seedlings of Caesalpinia pulcherrima . Substrates saw dust and carbonized rice straw were responsible for the worst performers on emergence and seedling development