Navegando por Autor "Serrão, Jose Eduardo"
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Item Atrazine and nicosulfuron affect the reproductive fitness of the predator Podisus nigrispinus (Hemiptera: Pentatomidae)(Anais da Academia Brasileira de Ciências, 2018-10) Serrão, Jose Eduardo; Reis, Tatiane C.; Soares, Marcus A.; Santos, José B. dos; Santos, Conceição A. dos; Zanuncio, José C.; Ferreira, Evander A.Herbicides can impact non-target metabolic pathways in natural enemies and lead to the reduction of these populations in the field. Behavioral characteristics, morphology and histology of reproductive structures and reproduction of females of Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae) were evaluated under the effect of the herbicides atrazine, nicosulfuron and the mixture of both. The number of mature oocytes per ovary was lower in females exposed to the herbicides atrazine, nicosulfuron and the mixture of both. Herbicides did not affect the longevity and mortality of P. nigrispinus, therefore, they are selective for this predator. On the other hand, herbicides can cause sublethal effects by affecting the reproduction of predators.Item Proventricular structure in solitary bees (Hymenoptera: Apoidea)(Elsevier Organisms Diversity & Evolution, 2005-06-10) Serrão, Jose EduardoProventricular structure, analyzed by scanning electronic microscopy, is compared among 28 species of solitary bees representing four families. Observations on the shapes of proventricular folds and on hair-like cuticular projections are presented, discussed, and suggested as useful to future studies of bee systematics.Item Ultrastructure and immunolocalization of digestive enzymes in the midgut of Podisus nigrispinus (Heteroptera: Pentatomidae)(Arthropod Structure & Development, 2013-07) Fialho, Maria do Carmo Q.; Terra, Walter R.; Moreira, Nathália R.; Zanuncio, José C.; Serrão, Jose EduardoThe predatory stinkbug Podisus nigrispinus has been utilized in biological control programs. Its midgut is anatomically divided into anterior, middle and posterior regions, which play different roles in the digestive process. We describe the midgut ultrastructure and the secretion of digestive enzymes in the midgut of P. nigrispinus. Midguts were analyzed with transmission electron microscopy and the digestive enzymes amylase, cathepsin L, aminopeptidase and α-glucosidase were immunolocalized. The ultrastructural features of the digestive cells in the anterior, middle and posterior midgut regions suggest that they play a role in digestive enzyme synthesis, ion and nutrient absorption, storage and excretion. The digestive enzymes have different distribution along the midgut regions of the predator P. nigrispinus. Amylase, aminopeptidase and α-glucosidase occur in three midgut regions, whereas cathepsin L occurs in the middle and posterior midgut regions. The anterior midgut region of P. nigrispinus seems to play a role in water absorption, the middle midgut may be involved in nutrient absorption and the posterior midgut region is responsible for water transport to the midgut lumen.