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Evidence of fungal structures in the mandible and elytra ofHypocryphalus mangif...
Pereira, Rogerio Machado; Martins, Gustavo Ferreira; Silva, Ricardo Siqueira da; Silva Galdino, Tarcisio Visintin da; Ferreira, Dalton de OliveiraMade available in DSpace on 2020-12-10T20:03:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-06-09; VALE Oman; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES); Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG); VALE; Ceratocystis fimbriataplays a significant role in the initiation of the tree decl...
Acute and oral exposure to imidacloprid does not affect the number of circulati...
Ravaiano, Samira Veiga; Barbosa, Wagner Faria; Tomé, Hudson Vaner Ventura; Campos, Lúcio Antônio de Oliveira; Martins, Gustavo FerreiraIn the present work, the effects of the neonicotinoid imidacloprid formulation on the total hemocyte counts (THC) and differential hemocyte counts (DHC) were investigated in foraging workers of the stingless bee Melipona quadrifasciata under (or not) the challenge with the bacteria Escherichia coli. The THC was not altered with the insecticide exposure and/or bacterial infection. However, the DHC of the bees ch...
A comparative study of the ovaries in some Brazilian bees (Hymenoptera; Apoidea)
Martins, Gustavo Ferreira; Serrão, José EduardoA morfologia do ovário em 33 espécies de abelhas apresentando diferentes graus de sociabilidade foi estudada. Todas as espécies apresentaram ovário do tipo meroístico politrófico formado por um germário anterior e um vitelário basal. No germário estão localizadas as células germinativas e o vitelário apresenta folículos arranjados linearmente. Cada folículo é constituído pela câmara nutridora e pela câmara ovoc...
Morphological features of the heart of six mosquito species as revealed by scan...
Martins, Gustavo Ferreira; Ramalho- Ortigão, José Marcelo; Pimenta, Paulo Filemon PaolucciThe circulatory system in insects is formed by a dorsal vessel (heart) that is a tubular structure that pumps haemolymph in the insect body cavity. Up until now, much is known about the structural organization of the heart in certain Brachycera (Diptera) (e.g. Drosophila). In contrast, little information is available regarding members of the Nematocera suborder (e.g. mosquitoes), in spite of their relevance to ...
Insights into the proteome of the spermatheca of the leaf- cutting ant Atta sex...
Malta, Juliana; Martins, Gustavo Ferreira; Marques, Ana Ermelinda; Games, Patrícia Dias; Zanuncio, José Cola; Baracat- Pereira, Maria CristinaNo presente estudo foram identificadas proteínas expressas na espermateca de rainhas virgens e fertilizadas da formiga cortadeira Atta sexdens rubropilosa. O perfil das proteínas expressas nas espermatecas é diferente em fêmeas virgens e fertilizadas. Os dados aqui apresentados contribuem para o entendimento do papel das proteínas produzidas pelas espermatecas para o armazenamento e manutenção da viabilidade do...
Spinosad-mediated effects on survival, overall group activity and the midgut of...
Araujo, Renan dos Santos; Lopes, Marcos Pereira; Barbosa, Wagner Faria; Gonçalves, Wagner Gonzaga; Fernandes, Kenner Morais; Martins, Gustavo FerreiraPopulations of stingless bees have declined around the world and pesticides have been indicated as one of the possible causes of this decrease. Spinosad, which is synthesized from the fermentation process produced by the soil actinomycete Saccharopolyspora spinosa, is one of the most used bioinsecticides today. This study aimed to evaluate the possible effects of spinosad (formulation) on survival, general grou...
Variations in circulating hemocytes are affected by age and caste in the stingl...
Ravaiano, Samira Veiga; Barbosa, Wagner Faria; Campos, Lúcio Antônio; Martins, Gustavo FerreiraThe insect immune system faces various challenges; particularly in social bees, caste system and age polyethism expose individuals to numerous environmental and working conditions. However, little is known about how cellular defenses in social bees may be organized to respond to a variety of immune challenges. Here, we describe the morphological features and the total and differential counts of hemocytes in dif...
Proteomic analysis of Aedes aegypti midgut during post-embryonic development an...
Fernandes, Kenner Morais; Magalhães-Júnior, Marcos Jorge de; Baracat-Pereira, Maria Cristina; Martins, Gustavo FerreiraIn this work we analyzed protein expression in the Aedes aegypti midgut during the larval (fourth instar, L4), pupal, and adult stages [including newly emerged (NE), sugar-fed (SF) and blood-fed (BF) females]. Two-dimensional electrophoresis showed 13 spots in the midgut of larvae, 95 in the midgut of pupae, 90 in the midgut of NE, and 76 in the midgut of SF or BF females. In the larval midguts, high serpin exp...
Galleria mellonella is an effective model to study Actinobacillus pleuropneumon...
Pereira, Monalessa Fábia; Rossi, Ciro César; Queiroz, Marisa Vieira de; Martins, Gustavo Ferreira; Isaac, Clement; Bossé, Janine T.; Li, YanwenActinobacillus pleuropneumoniae is responsible for swine pleuropneumonia, a respiratory disease that causes significant global economic loss. Its virulence depends on many factors, such as capsular polysaccharides, RTX toxins and iron-acquisition systems. Analysis of virulence may require easy-to-use models that approximate mammalian infection and avoid ethical issues. Here, we investigate the potential use of ...
Midgut morphological changes and autophagy during metamorphosis in sand flies
Malta, Juliana; Heerman, Matthew; Weng, Ju Lin; Fernandes, Kenner M.; Martins, Gustavo Ferreira; Ramalho-Ortigão, MarceloDuring metamorphosis, holometabolous insects undergo significant remodeling of their midgut and become able to cope with changes in dietary requirements between larval and adult stages. At this stage, insects must be able to manage and recycle available food resources in order to develop fully into adults, especially when no nutrients are acquired from the environment. Autophagy has been previously suggested to...