5 documents found, page 1 of 1
Digestive and regenerative cells in the midgut of haploid and diploid males of ...
Fernandes, Kenner M.; Martins, Gustavo F.; Serrão, José E.; Neves, Clóvis A.In eusocial bees, workers and queens are diploid (2n), whereas males are haploid (n). However, in some species, including the stingless bee Melipona quadrifasciata anthidioides Lepeletier, 1836, 2n males arise from fertilized eggs resulting from the crossing between a queen and her brother. In the present study, we provide a comparative analysis of the digestive and regenerative cells in n and 2n pupae and adul...
Morphology and morphometry of the Midgut in the Stingless Bee Friesella schrott...
Oliveira, André H.; Gonçalves, Wagner G.; Fernandes, Kenner M.; Barcellos, Marcelo S.; Sampaio, Wagner M. S.; Lopes, Marcos P.; Martins, Gustavo F.Friesella schrottkyi is a small stingless bee (3-mm long) important for agricultural and native forest pollination. This study describes the morphology and morphometry of the midgut in F. schrottkyi forager workers. The F. schrottkyi midgut presents a single-layered epithelium with digestive, regenerative and endocrine cells. The digestive cells are similar along the entire midgut length with a spherical nucleu...
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...
Termiticidal lectins from Myracrodruon urundeuva (Anacardiaceae) cause midgut d...
Lima, Thâmarah A.; Fernandes, Kenner M.; Oliveira, Ana Patrícia S.; Dornelles, Leonardo P.; Martins, Gustavo F.; Napoleão, Thiago H.Myracrodruon urundeuva is a hardwood tree, and its bark, heartwood and leaf contain lectins (MuBL, MuHL and MuLL respectively) with termiticidal activity against Nasutitermes corniger. In this work, the effects of these lectins on the midgut of N. corniger workers were evaluated. The insects were supplied with an artificial diet containing the lectins at their respective LC 50 (previously determined). At 48 h a...
Effects of the oral administration of viable and heat-killed Streptococcus bovi...
Paiva, Aline D.; Fernandes, Kenner M.; Dias, Roberto S.; Rocha, Alípio S.; Oliveira, Leandro L. de; Neves, Clóvis A.; Paula, Sérgio O. deAntimicrobial peptides have been suggested as an alternative to classical antibiotics in livestock production and bacteriocin-producing bacteria could be added to animal feeds to deliver bacteriocins in the gastrointestinal (GI) tract of ruminant and monogastric animals. In this study, viable (V) and heat-killed (HK) Streptococcus bovis HC5 cells were orally administered to pre-sensitized mice in order to asses...