283 research outputs found

    Comportamento da Macrofauna edáfica em diferentes modelos de arborização de cafeeiro Robusta (Coffea canephora) em Rondônia.

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    O levantamento da fauna edáfica do solo é uma forma indicada de avaliar a viabilidade em função do manejo deste tipo de sistema. O objetivo deste trabalho foi fazer um levantamento da ocorrência da macrofauna do solo em 05 (dez) propriedades cultivadas com o café Robusta (Coffea canephora) arborizado no município de Rolim de Moura, localizado na região da Zona da Mata/RO em duas épocas diferentes. Na época chuvosa e seca, as Ordens com maiores frequência de ocorrência foram Hymenoptera, Araneae, Coleoptera, Dermaptera, Orthoptera, Isoptera, Acari, Lithobiomorpha, Diptera, Hemiptera. Através do índice de diversidade de Shannon identificou-se propriedades com maior estabilidade, principalmente quando houve maior diversidade de espécies florestais nos SAFs. O manejo dos SAFs, o clima, a diversidade de espécies florestais e o tamanho das áreas amostradas possivelmente influenciam a diversidade de Ordens da macrofauna

    Quebra de dormência em diásporos de teca (Tectona grandis L.f.).

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    Tectona grandis L.f. é uma essência florestal exótica de importância econômica e social para o Brasil. As mudas dessa espécie são produzidas através de diásporos constituídos dos frutos com endocarpo e mesocarpo rígidos. O objetivo do presente trabalho foi avaliar o efeito de métodos de quebra de dormência na germinação das sementes desta espécie. Para superar a dormência do endocarpo e mesocarpo, os diásporos de teca foram submetidos à imersão em água quente, imersão em ácido sulfúrico (33,5%) e imersão em água corrente. Os diásporos foram distribuídos em substrato constituído de areia, e o teste de germinação foi realizado em câmara de germinação com temperatura de 30 ºC, sob luz branca durante oito horas por dia. As avaliações foram feitas diariamente, durante 60 dias. O método de imersão dos diásporos em ácido sulfúrico por três minutos, foi o tratamento mais eficiente, apresentando 73% das sementes germinadas

    Profile of a Cohort of 78 Italian Patients with Mucous Membrane Pemphigoid: Correlation Between Reactivity Profile and Clinical Involvement

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    Direct diagnosis of mucous membrane pemphigoid (MMP) is not easy. Circulating autoantibodies targeting bullous pemphigoid antigens of 180 kDa and 230 kDa (BP180 and BP230), \u3b16\u3b24 integrin, laminin 332 and type VII collagen (Col VII) are not always present. The aims of this study were to characterize the humoral immune response of a cohort of Italian patients with MMP, its association with clinical involvement and severity, and to design an algorithm for efficient serological diagnosis. Seventy-eight MMP sera were studied retrospectively by indirect immunofluorescence on salt-split skin, enzyme-linked immunosorbent assay (ELISA) and immunoblotting. Indirect immunofluorescence on salt-split skin resulted in the most sensitive approach for diagnosis of MMP. BP180 was the major autoantigen in MMP patients with oral and cutaneous involvement. Significant associations were found between BP180 reactivity and oral and cutaneous localization of the lesions (p\u2009=\u20090.006), and between Col VII positivity and Setterfield severity score (p\u2009=\u20090.020)

    CHARACTERIZING HETEROSIS IN A SET OF RECOMBINANT INTERCROSSES (RIXS) DEVELOPED FROM A MULTIPARENTAL MAIZE POPULATION

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    The exploitation of heterosis is key in modern maize breeding to capture the superior performance of heterozygous genotypes. Here, we developed a recombinant intercross (RIX) population in maize by crossing pairs of multiparental MAGIC recombinant inbred lines (RILs) to evaluate the heterosis across mosaics of eight maize haplotypes. Field phenotyping was performed on 400 RIX genotypes considering 11 agronomic traits as well as the resistance to Fusarium Ear Rot (FER), caused by Fusarium verticillioides (Sacc.) Nirenberg, in 2018 and 2019 in Piacenza, northern Italy. Phenotypic data showed a broad range of diversity in production and phenology traits thanks to the high level of allelic diversity available in parental genomes. The heterotic response of agronomic traits was computed based on RIL values as mid parent heterosis (MPH) and best parent heterosis (BPH). Both heterosis measures showed different magnitudes for different traits, with higher level of heterosis in yield and lower in flowering time, suggesting effects from partial dominance to over-dominance. No correlation was observed between phenotypic performance and heterozygosity level of RIXs for most of the agronomic traits. A preliminary quantitative trait locus (QTL) mapping detected a number of significant associations with agronomic traits across all chromosomes. The RIX collection showed a moderate heritability of FER resistance, and QTL were associated to this trait as well. The allelic effect estimates by our mapping model indicated the presence of minor effect QTL with relatively small additive effects on disease resistance in both years. Our findings confirm the usefulness of the RIX population to decipher heterotic loci in maize and support utilizing this resource in future to accelerate crop improvement

    Proposal for a 6-step approach for differential diagnosis of neonatal erythroderma

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    The broad differential diagnosis of neonatal erythroderma often poses a diagnostic challenge. Mortality of neonatal erythroderma is high due to complications of the erythroderma itself and the occasionally severe and life-threatening underlying disease. Early correct recognition of the underlying cause leads to better treatment and prognosis. Currently, neonatal erythroderma is approached on a case-by-case basis. The purpose of this scoping review was to develop a diagnostic approach in neonatal erythroderma. After a systematic literature search in Embase (January 1990 - May 2020, 74 cases of neonatal erythroderma were identified, and 50+ diagnoses could be extracted. Main causes were the ichthyoses (40%) and primary immunodeficiencies (35%). Congenital erythroderma was present in 64% (47/74) of the cases, predominantly with congenital ichthyosis (11/11; 100%), Netherton syndrome (12/14, 86%) and Omenn syndrome (11/23, 48%). Time until diagnosis ranged from 102 days to 116 days for cases of non-congenital erythroderma and congenital erythroderma respectively. Among the 74 identified cases a total of 17 patients (23%) died within a mean of 158 days and were related to Omenn syndrome (35%), graft-versus-host disease (67%) and Netherton syndrome (18%). Disease history and physical examination are summarized in this paper. Age of onset and a collodion membrane can help to narrow the differential diagnoses. Investigations of blood, histology, hair analysis, genetic analysis and clinical imaging are summarized and discussed. A standard blood investigation is proposed, and the need for skin biopsies with lympho-epithelial Kazal-type related Inhibitor staining is highlighted. Overall, this review shows that diagnostic procedures narrow the differential diagnosis in neonatal erythroderma. A 6-step flowchart for the diagnostic approach for neonatal erythroderma during the first month of life is proposed. The approach was made with the support of expert leaders from international multidisciplinary collaborations in the European Reference Network Skin-subthematic group Ichthyosis.Peer reviewe

    Sodium valproate in migraine without aura and medication overuse headache: A randomized controlled trial

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    Objective: To assess the efficacy, safety and tolerability of sodium valproate (800. mg/die) compared with placebo in medication-overuse headache patients with a history of migraine without aura. Methods: This is a multicenter, randomized, double-blind, placebo-controlled study enrolled medication-overuse headache patients for a 3-month treatment period with sodium valproate (800. mg/day) or placebo after a 6 day outpatient detoxification regimen, followed by a 3-month follow-up. Primary outcome was defined by the proportion of patients achieving ≥50% reduction in the number of days with headache per month (responders) from the baseline to the last 4 weeks of the 3-month treatment. Multivariate logistic regression models were used on the primary endpoint, adjusting for age, sex, disease duration, comorbidity and surgery. The last-observation-carried-forward method was used to adjust for missing values. Results: Nine sites enrolled 130 patients and, after a 6-day detoxification phase, randomized 88 eligible patients. The 3-month responder rate was higher in the sodium valproate (45.0%) than in the placebo arm (23.8%) with an absolute difference of about 20% (p=0.0431). Sodium valproate had safety and tolerability profiles comparable to placebo. Conclusions: The present study supports the efficacy and safety of sodium valproate in the treatment of medication overuse headache with history of migraine after detoxification

    Analysis of landrace cultivation in Europe: A means to support in situ conservation of crop diversity

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    During the last century, the progressive substitution of landraces with modern, high yielding varieties, led to a dramatic reduction of in situ conserved crop diversity in Europe. Nowadays there is limited and scattered information on where landraces are cultivated. To fill this gap and lay the groundwork for a regional landrace in situ conservation strategy, information on more than 19,335 geo-referenced landrace cultivation sites were collated from 14 European countries. According to collected data, landraces of 141 herbaceous and 48 tree species are cultivated across Europe: Italy (107 species), Greece (93), Portugal (45) and Spain (44) hold the highest numbers. Common bean, onion, tomato, potato and apple are the species of main interest in the covered countries. As from collected data, about 19.8% of landrace cultivation sites are in protected areas of the Natura 2000 network. We also got evidence that 16.7% and 19.3% of conservation varieties of agricultural species and vegetables are currently cultivated, respectively. Results of the GIS analysis allowed the identification of 1261 cells (25 km × 25 km) including all the cultivation sites, distributed across all European biogeographical regions. Data of this study constitute the largest ever produced database of in situ-maintained landraces and the first attempt to create an inventory for the entire Europe. The availability of such resource will serve for better planning of actions and development of policies to protect landraces and foster their use
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