Avaliação da produção e da incidência da podridão radicular em genótipos de mandioca (Manihot esculenta Crantz) cultivados em dois sistemas de preparo de solo.

Este trabalho teve como objetivo avaliar a produção de raízes e a incidência da podridão radicular em sete genótipos cultivados em dois sistemas de preparo de solo

Ocorrência de Magulacra nigripennata Dognin (Lepidoptera: Cossidae) em Cupuaçuzeiro no Estado do Amapá.

O Cupuaçuzeiro [Theobroma grandiflorum (Willd. Ex Spreng.) K. Schum. (Malvaceae)] é uma das espécies frutíferas nativas de maior importância econômica para a região Amazônica. Seu fruto é muito apreciado pela população local em virtude da polpa ser utilizada para elaboração de sucos, sorvetes, picolés, geleias, iogurtes, doces e compotas. Apesar de sua importância, a expansão dos cultivos de cupuaçu na região tem sido limitada por problemas fitossanitários. No mês de julho de 2014, em visita a um pomar de cupuaçuzeiro (1.300 plantas com 6 anos de idade) na Colônia Agrícola do Matapi (00º37?N e 51º25?W), município de Porto Grande, Amapá, foram detectadas plantas com sintomas de secamento de ramos terminais, geralmente tombam sobre a copa do cupuaçuzeiro. Aproximadamente 30% das plantas apresentavam esse sintoma. Os danos são decorrentes do ataque de uma lepidobroca Magulacra nigripennata Dognin (Lepidoptera: Cossidae), conhecida como broca-dos-ramos ou broca-doramo- terminal. A lagarta é de coloração avermelhada nas regiões ventral e cefálica, apresentando listras transversais de coloração marrom escuro e amarelado na região dorsal. O ataque inicia com a construção de galerias no interior do ramo terminal. Antes de pupar na galeria, provoca o anelamento basal do ramo, causando o seu secamento e abrindo uma galeria no sentido perpendicular à galeria, para saída do adulto. Geralmente ocorre uma lagarta por ramo atacado.Os danos estão associados ao secamento dos ramos terminais e posterior morte da planta. Este é o primeiro registro dessa espécie no estado do Amapá. Previamente a espécie foi reportada em cupuaçuzeiro no estado do Amazonas e em cacaueiro (Theobroma cacao L.) em Rondônia e Pará. Na Amazônia, as informações sobre a biologia e ecologia de M. nigripennata são inexistentes. Portanto, estudos relacionados à duração do ciclo de vida e flutuação populacional são prioritários para o desenvolvimento de estratégias de manejo adequadas.Resumo 1612

A broca-dos-ramos-do-cupuaçuzeiro (Magulacra nigripennata Dognin, 1924) no Amapá.

bitstream/item/143725/1/CPAF-AP-2016-COM-TEC-141-Broca-cupuacu-V4.pd

Índices produtivos de melancia com uso de calagem e irrigação.

Este trabalho teve o objetivo de estudar os efeitos de diferentes doses de calcário aplicados ao solo, e de diferentes arranjos de irrigação por gotejamento, na cultura da melancia estabelecida em condições de terra firme

Lung metastases share common immune features regardless of primary tumor origin

BACKGROUND: Only certain disseminated cells are able to grow in secondary organs to create a metastatic tumor. Under the hypothesis that the immune microenvironment of the host tissue may play an important role in this process, we have categorized metastatic samples based on their immune features. METHODS: Gene expression data of metastatic samples (n=374) from four secondary sites (brain, bone, liver and lung) were used to characterize samples based on their immune and stromal infiltration using gene signatures and cell quantification tools. A clustering analysis was done that separated metastatic samples into three different immune categories: high, medium and low. RESULTS: Significant differences were found between the immune profiles of samples metastasizing in distinct organs. Metastases in lung showed a higher immunogenic score than metastases in brain, liver or bone, regardless of their primary site of origin. Also, they preferentially clustered in the high immune group. Samples in this cluster exhibited a clear inflammatory phenotype, higher levels of immune infiltrate, overexpression of programmed death-ligand 1 (PD-L1) and cytotoxic T-lymphocyte-associated protein 4 (CTLA4) pathways and upregulation of genes predicting clinical response to programmed cell death protein 1 (PD-1) blockade (T-cell inflammatory signature). A decision tree algorithm was used to select CD74 as a biomarker that identify samples belonging to this high-immune subtype of metastases, having specificity of 0.96 and sensitivity of 1. CONCLUSIONS: We have found a group of lung-enriched metastases showing an inflammatory phenotype susceptible to be treated with immunotherapy

Avaliação e seleção de clones de mandioca em propriedade familiar no município de Manacapuru, AM.

A baixa produtividade de raiz de mandioca (3 t ha-1) na comunidade Manairão, Município de Manacapuru, AM, fez com que houvesse uma demanda pela pesquisa com intuito de solucionar o problema. O trabalho teve como objetivo aumentar a produtividade dessa cultura, introduzir boas práticas de manejo solo/planta/tratos culturais, por meio de clones mais produtivos, oriundos do Banco Ativo de Germoplasma (BAG) de mandioca da Embrapa Amazônia Ocidental

Antifungal activity of the isolated from caatinga actinobacteria in control of Pythium aphanidermatum.

The Caatinga is a biome located in a semiarid region of northeastern Brazil. It consists of various ecosystems, presented a unique environmental system of this country. Because it is an environment with unique characteristics, recent studies have revealed the private wealth of this biome in terms of microbial biodiversity. Microorganisms found in this habitat may present specific mechanisms to ensure their survival in this environment that provides extreme conditions, such as temperature changes, intense solar radiation and hydrous stress. Because of these different mechanisms used by different microorganisms, becomes an enabling environment to search for new enzymes and bioactive substances produced by these organisms can present different biotechnological applications. Among all microbial diversity, the group of actinobacteria is of great importance, because they are responsible for producing most of the known antibiotics and present as great producers of enzymes with various industrial applications. One possible application of compounds produced by this organism is the phytogenic fungi combat, such as rot caused in roots of plants by the fungus Pythium aphanidermatum. This study aimed to search actinobacteria from Caatinga biome with metabolic potential to work in the biological control of Pythium aphanidermatum fungus. With Caatinga soil samples, they were isolated actinomycetes differences in morphologies and subjected to extraction metabolites produced from solid culture medium. The extracts were tested on the P. aphanidermatum fungus diffused by drive test. From the isolation were recovered a total of 272 strains of actinomycetes, of this total 47% of the isolates showed in vitro activity against the pathogen Pythium aphanidermatum. The results showing the great potential that actinobacteria may present as control agents against root rot. However, more detailed studies are needed to prove such results

Produção e renda bruta em consórcio de couve-de-folha e coentro com uso de biofertilizante em cultivo protegido.

Neste trabalho foi estudada a consorciação da couve-de-folha com o coentro, com uso de biofertilizante aplicado ao solo

Acute Treatment of Isolated Posterior Cerebral Artery Occlusion: Single Center Experience

Background and objectives: Randomized trials for mechanical thrombectomy (MT) excluded patients with ischemic strokes due to isolated posterior cerebral artery occlusion (IPCAO), and there is no evidence for best acute treatment strategy in these patients. We aimed to assess the effectiveness and safety of MT in acute IPCAO. Methods: We retrospectively analyzed consecutive patients with acute stroke due to IPCAO submitted to MT and/or intravenous thrombolysis (IVT), between 2015-2019. Effectiveness outcomes (recanalization rate, first-pass effect, NIHSS 24h improvement and 3-month Modified Ranking Scale - mRS) and safety outcomes (complications, symptomatic intracranial hemorrhage (SICH) and 3-month mortality) were described and compared between groups. Results: A total of 38 patients were included, 25 underwent MT and 13 had IVT alone. Successful and complete recanalization were achieved in 68% and 52% of MT patients, respectively. NIHSS improvement at 24h was found in 56% of MT patients versus 30.8% of patients submitted to IVT alone (OR [95% CI]=2.86 [0.69-11.82]) and excellent functional outcome at 3 months (mRS≤1) was achieved in 54.2% of MT patients versus 38.5% in the IVT group (OR [95% CI]=1.60 [0.41-6.32]). Complications occurred in 3 (12%) procedures and there were no SICH. Mortality at 3 months was 20% in the MT group and 15.4% in patients submitted to IVT alone. Conclusions: Our results reflect a real-world scenario in a single center and seem to support the recently growing literature showing that MT is a feasible and safe treatment in IPCAO, with favorable effectiveness.info:eu-repo/semantics/publishedVersio

Avaliação em acessos de mandioca quanto a resistência a Neosilba perezi (Romero & Ruppel).

O objetivo do trabalho foi de avaliar a infestação por mosca-dos-brotos em acessos de mandioca do Banco Ativo de Germoplasma (BAG) pertencente a Embrapa Amazônia Ocidental, visando a busca de materiais resistentes à essa praga