7 research outputs found

    Biomassa, morfologia e curva de crescimento de cinco genótipos de Pfaffia glomerata em condição de estufa

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    Monografia (graduação)—Universidade de Brasília, Faculdade de Agronomia e Medicina Veterinária, 2012.As raízes de Pfaffia glomerata (Spreng.) Pedersen, espécie perene, de porte arbustivo pertencente à família Amaranthaceae, são de grande interesse comercial, tanto na forma de fito-medicamentos, quanto de suplementos alimentares. É uma espécie nativa da América do Sul e de ocorrência comum nos Estados do Paraná, Mato Grosso do Sul e Goiás. O objetivo do presente trabalho foi obter a curva de crescimento de cinco genótipos de Pfaffia glomerata obtidos a partir da autosemeadura ocorrida na coleção de acessos da UnB, determinar a produção de biomassa da parte aérea e da raiz e descrever sua morfologia externa. O ensaio foi feito em estufa do tipo Glasshouse. As temperaturas médias das mínimas e das máximas durante os meses de ensaio foram respectivamente 20.1º C e 35,5 ºC. A partir das cinco plântulas oriundas da autosemeadura foram obtidas estacas uninodais que foram crescidas em miniestufa e ao enraizarem e atingirem em média 10 cm de altura, foram transplantadas para vasos de 2L de capacidade contendo mistura de solo adubado e dispostos sobre bancadas de cimento na estufa do tipo Glasshouse. Durante oito semanas após o transplante, foi medida semanalmente a altura da planta, desde o nível do coleto até o broto mais elevado e, ao final do ensaio foi obtida a massa fresca das raízes e a massa fresca da parte aérea. Foram anotadas as características morfológicas das plantas para acessar a diversidade neste item, compreendendo a morfologia do limbo foliar, a cor do talo e a pilosidade e a emissão floral. O crescimento das plantas de P. glomerata em condição de estufa apresentou-se compatível com o padrão da cultura. As plantas oriundas da auto-semeadura apresentaram elevada segregação de caracteres morfológicos

    A AFETIVIDADE E ALFABETIZAÇÃO EMOCIONAL E SEUS VÍNCULOS COM A APRENDIZAGEM ESCOLAR

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    Resumo: Este texto tem como objetivo descrever a relação entre a afetividade e inteligência, a partir do aporte teórico de Henri Wallon e Gardner. Serão analisados os estágios de desenvolvimento, e suas relações com as emoções bem como uma análise acerca das concepções das docentes da educação infantil sobre a construção da afetividade. Por meio de uma revisão bibliográfica destaca-se a alfabetização emocional como um caminho a ser percorrido pelas escolas e pelos professores na busca de promover práticas de ensino que colaborem para a construção de relações mais harmoniosas e respeitosas entre os pares.  Apresenta os dados coletados mediante questionários aplicados na instituição pública de educação infantil Escola Municipal Comecinho de Vida na cidade de São Miguel do Passa Quatro – GO. &nbsp

    Physical exercise interventions and cognitive functions in the elderly: a systematic review

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    The objective of this systematic review was to analyze and summarize the characteristics of studies evaluating the effect of physical exercise on cognitive functions in the elderly and present possible variables related to improvement in cognition. The databases consisted of Scielo, MEDLINE, PsycINFO, and BVS Regional Portal, between the years 2010 and 2020. Empirical research was included, which had exercise intervention with people aged 60 years and older. Thirteen studies met the inclusion criteria, of which nine found an improvement effect and four a maintenance effect of physical exercise on cognitive functions. Most studies had moderate methodological quality, indicating the need for greater control of bias in future research. In addition, a dose-response effect was evidenced, indicating that high intensity and frequency of physical exercise may be associated with improvement, as well as an acute effect, in which gains are more pronounced in the first months of intervention, tending to stabilize later. This review suggests that physical exercise may be protective to cognition in the elderly

    Host suitability of soybean and corn genotypes to the root lesion caused by nematode under natural infestation conditions

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    ABSTRACT: Among the nematode management strategies, genetic resistance is one of the most appropriate and desirable. However, resistant soybean and corn genotypes resistant to Pratylenchus brachyurus are not available up to the moment. The objective of this study was to evaluate the host suitability of 50 soybean and 38 corn genotypes to P. brachyurus under natural infestation. Soybean genotypes BRSGO Chapadões, BRSGO Paraíso, M-Soy 7211 RR, M-Soy 8008 RR, Emgopa 313 RR, M-Soy 8411, BRSGO Juliana RR, Emgopa 316 RR, BRSGO Luziânia RR and TMG 103 RR, and corn genotype Agromem 30A06 reduced the nematode population during the evaluation period

    Structure and composition of the nematode community in a restoration area affected by iron tailings

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    In 2015, the Fundão Dam collapse released over 40 million m3 of iron mine tailings, causing several environmental damages. Certain affected areas were revegetated with a mix of fast-growing species that can allowed the return of some organisms of soil fauna. Nematodes are the most abundant multicellular organisms in soil and are commonly used as bioindicators. Therefore, this study aimed to use the nematode community as bioindicators of the restoration process of an area affected by iron tailings at the margins of the Gualaxo do Norte River. Soil samples were collected from affected and native forest areas to perform physical, chemical, biochemical, and biological analyses. Nematodes were identified and classified according to feeding habits and on a colonizer-persisters (cp) scale. A non-metrical multidimensional scaling and PERMANOVA were conducted to assess differences between communities. Shannon's diversity index and the maturity index were significantly higher in the restoration area. There was a difference in the composition and the structure of nematode communities of the restoration and reference area, nematode genus occurrence and abundance were different between the areas resulting in differences in feeding habits and life strategies according to the cp scale. The cp-5 nematodes are more abundant in the restoration area and cp-1 in the forest reference area. Bacterivore nematodes were more abundant in the reference forest area. In addition, the soil attributes in the restoration area were altered following the tailings deposition. Such alterations include high pH, low organic matter content, and low microbial biomass, which consequently influenced the structure and the composition of the nematode community. This is likely the first report of soil nematode community diversity in the areas of the Rio Doce Basin impacted by the Fundão tailings, and nematodes proved to be good bioindicators to show the differences between the restoration and forest reference area
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