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URI permanente para esta coleçãohttps://locus.ufv.br/handle/123456789/11845
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Item Digestive and regenerative cells in the midgut of haploid and diploid males of the stingless bee Melipona quadrifasciata anthidioides (Hymenoptera: Apidae)(Zoologia (Curitiba), 2012-10) 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 adult males of M. quadrifasciata anthidioides. In n and 2n pupae and adult males, the number of regenerative cells/nest was similar. In n and 2n pupae, the mean number of digestive cells/midgut area was 2076 ± 0.60, whereas in adults it was 1234 ± 1.42 digestive cells/midgut area. The nuclear area of the digestive cells was also similar in both n and 2n adult males (~154 µm2) and smaller in pupae (~91 µm2); this variation might be a result of DNA amplification in digestive cells during bee development. The results from our current study provide further understanding of the morphological and physiological aspects of the digestive tract of bees and show that the ploidy difference between n and 2n male stages does not affect the number of digestive and regenerative cells in the midgut of M. quadrifasciata anthidioides.Item Post-embryonic development of intramandibular glands of Friesella schrottkyi (Friese, 1900) (Hymenoptera: Apidae) workers(Papéis Avulsos de Zoologia, 2017) Oliveira, André Henrique de; Lisboa, Luciane Cristina de Oliveira; Serrão, José Eduardo; Zanuncio, José Cola; Souza, Edmilson Amaral deExocrine glands play important role in social organization of insects, such as caste and inter-caste differentiation. Due their functional and structural plasticity, morphological studies on such glands contribute to better understanding the biology of social bees. Therefore, the aim of the study was to characterize the sequence of the post-embryonic development of intramandibular glands of Friesella schrottkyi (Friese, 1900) (Hymenoptera: Apidae) workers using histological and histochemical analyses. The mandibles of pupae at different developmental stages and newly emerged adults were analyzed. The intramandibular glands of F. schrottkyi presented two types: class I glands, in the mandible epidermis and class III glands, inside the mandible cavity that open onto external surface. The intramandibular glands of F. schrottkyi developed during the transition from the prepupae to the white-eyed pupae, as shown by the morphological changes. Black-eyed pupae of F. schrottkyi presented fully developed intramandibular glands.Item Oogenesis pattern and type of ovariole of the parasitoid Palmistichus elaeisis (Hymenoptera: Eulophidae)(Anais da Academia Brasileira de Ciências, 2012-09) Andrade, Gilberto S.; Sousa, Adalberto H.; Santos, Juliana C.; Gama, Farah C.; Serrão, José E.; Zanuncio, José C.The knowledge on ovigeny in parasitoids is important for basic studies on physiology and applied biological control. The ovigeny pattern and type of ovariole of the parasitoid Palmistichus elaeisis Delvare & LaSalle (Hymenoptera: Eulophidae) were studied in newly-emerged females at seven, 14, 24 and 48 h intervals after their emergence from Tenebrio molitor L. pupae (Coleoptera: Tenebrionidae). Females of P. elaeisis presented ovaries composed by four ovarioles of the meroistic polytrophic type. The yolk accumulation and chorionogenesis in P. elaeisis were concluded 24 h after the female emergence. The 48 h-old females show a high quantity of egg ready for oviposition. These findings can help to improve the mass production of P. elaeisis and the augmentative biological control by using this natural enemy.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 Redescriptions, lectotype designations, new synonyms and new geographic records for the “tiger” species of Mycotretus Lacordaire, 1842 (Coleoptera: Erotylidae: Tritomini)(Insects, 2018-12) Pecci-Maddalena, Italo S. C.; Lopes-Andrade, CristianoThe Neotropical Mycotretus Lacordaire, 1842 is one of the largest and most widespread genera of the Erotylidae, encompassing more than 200 described species. Among the species with a similar body coloration, there is a “group” of six valid species—called here the “tiger” Mycotretus—that possess several pronotal and elytral black spots, as follows: M. tigrinus (Olivier, 1792); M. multimaculatus Taschenberg, 1870; M. centralis Arrow, 1909; M. tigrinoides Mader, 1942; M. tigripennis Mader, 1942; and M. prioteloides Mader, 1942. Different from any other Mycotretus with spots, the spots of the “tiger” Mycotretus are numerous and are not bilaterally symmetrical in pattern. Here, new geographical records, diagnoses and redescriptions are provided for M. tigrinus, M. centralis, M. tigrinoides, M. tigripennis and M. prioteloides, including the first descriptions of their male and female terminalia. Lectotypes are designated for M. multimaculatus, M. centralis, and M. leopardus. Mycotretus multimaculatus and M. tigrinus pardalis Crotch, 1876 are proposed as new junior synonyms of M. tigrinus. Additionally, the authorship of the name M. leopardus is attributed to Crotch, 1876, because he was the first author to provide a description for that taxon, and the synonymy of M. leopardus and M. conspersus (Germar, 1824) with M. tigrinus (Olivier, 1792) is confirmed.Item Histological evidence of a glandular tubercle at the abdominal tergite in three species of katydids (Orthoptera: Tettigoniidae)(Zoologischer Anzeiger, 2018-05) Serrão, José Eduardo; Salazar, Karen; Chamorro-Rengifo, JulianaThree species of Hyperophora Brunner von Wattenwyl have a tubercle on the second abdominal tergite with different external appearance among species. We predicted that the tubercles are a glandular structure for their morphology and anatomical position. In H. major Brunner von Wattenwyl and H. brasiliensis Brunner von Wattenwyl the tubercle is low and broad, whereas in H. minor Brunner von Wattenwyl it is high. In all species the tubercle does not have an external opening, but it has many chemosensory sensilla, evidenced by long setae with an internal cavity with a membrane-like content. The cuticular surface of the tubercle has many pores with ∼1–2 μm in diameter scattered among the sensilla. On the inner surface of the tubercular region occur epidermal gland cells, evidenced by a mass of large globular cells with an irregular and well-developed nucleus with predominance of decondensed chromatin and a large nucleolus. The cytoplasm of these cells is rich in small clear vacuoles, and has an end apparatus, a feature of epidermal gland cells of class III. Each gland cell has a conducting canal that opens into a cuticular pore. These results support the hypothesis that the tubercles are indeed of glandular nature.Item Modifications in the oviducts of workers and queens of Melipona quadrifasciata anthidioides (Hymenoptera: Apidae) with different ages(Protoplasma, 2010-11-26) Serrão, José Eduardo; Naves, Amanda Paula; Zanuncio, José ColaThe study of morphological features of highly eusocial bees has helped to answer a series of questions concerning their biology. The labor division places the females into two castes, queen with reproductive function and worker with a wide variety of tasks. However, in different species and under different conditions, workers can develop ovaries and lay trophic eggs that are eaten by the queen or used to originate males. In this work, the development of the oviducts was monitored in workers and virgin queens of Melipona quadrifasciata anthidioides specimens of different ages to verify whether there is permanent sterility of these queens and workers due to aging. Lateral and common oviducts of virgin queens aged <7, 10, 15, 20, and 25 days old, physogastric queens, nurse, and forager workers were analyzed for histology and ultrastructure. Although the structural organization of the lateral and common oviducts were very similar, differences in width of the cuticle and the degree of chromatin condensation were observed, indicating differences in the development of this organ of the reproductive system between the castes. It was also demonstrated that electron-lucent vesicles appear to be related to the formation of the cuticle that lines the oviducts. Because no cellular death characteristics were found, it can be inferred that the absence of mating of the queens as old as of 25 days of age does not cause permanent sterility.Item Sperm morphology of the Prorops nasuta (Waterston, 1923) (Hymenoptera: Bethylidae)(Tissue and Cell, 2010-04-27) Oliveira, C.M.; Mancini, K.; Dolder, H.; Lino-Neto, J.In the present study, spermatozoa of the Prorops nasuta (Hymenoptera: Bethylidae) parasitoid were described morphologically. This is the first publication to describe a species belonging to the superfamily Chrysidoidea. Light and transmission electron microscopy were used. The spermatozoa of P. nasuta are linear, with a mean length of 665 μm. The acrosome is composed of an acrosomal vesicle and a perforatorium. The nucleus measures approximately 17 μm in length and is circular at its cross-section; however, its anterior extremity is oval. The chromatin is electron-dense and compact, although there are clear areas in the posterior peripheral regions. In the nucleus-flagellum transition region, the cross-section of the centriole adjunct is oval, with a pleated border and an E-PTA-positive peripheral region. The axoneme shows a 9 + 9 + 2 microtubule arrangement. The microtubules are E-PTA positive and, at the posterior extremity, the accessories are the last to terminate. The diameters and shapes of the two mitochondrial derivatives are almost identical. One begins beside the nuclear base and the other after the centriole adjunct. Posteriorly, they terminate together, immediately before the axoneme. Both have mitochondrial cristae and a region of paracrystalline material; however, the format and arrangement of this material differs from those of all other species previously studied. The paracrystalline material is more strongly E-PTA positive than the cristae region. Accessories bodies are electron-dense and located between the mitochondrial derivatives and the axoneme. In general, P. nasuta spermatozoa are similar to those of the majority of Hymenoptera; however, they have various exclusive characteristics that may be useful for studying the phylogeny and taxonomy of the superfamily Chrysidoidea and of Hymenoptera in general.Item Ultrastructure and morphometric features of epididymal epithelium in Desmodus rotundus(Micron, 2017-08-26) Castro, Mariana Moraes de; Gonçalves, Wagner Gonzaga; Teixeira, Stéphanie Asséf Millen Valente; Queiroz Fialho, Maria do Carmo; Santos, Felipe Couto; Oliveira, Jerusa Maria; Serrão, José Eduardo; Machado-Neves, MarianaThe blood-feeding behavior of Desmodus rotundus made this bat a potential vector of rabies virus and a public health issue. Consequently, the better understanding of its reproductive biology becomes valuable for the development of methods to control its population. In this study, we described morphological aspects of epithelial cells in D. rotundus’ epididymis using light and transmission electron microscopy methods. The duct compartment was the main component of initial segment (83%), caput (90%), corpus (88%) and cauda (80%) regions. The epithelium lining the duct presented a progressive decrease in its height from initial segment to cauda regions. Moreover, the morphology of each cell type was the same along the entire duct. Similarly to rodents, columnar-shaped principal cells were the most abundant cell type throughout the epididymis, followed by basal and clear cells. Differently in rat and mice, the frequency of clear cells did not increase in the epididymis cauda, whereas the proportion of principal and basal cells was greater in this region. Furthermore, D. rotundus presented goblet-shaped clear cells with the nucleus located in the apical portion of the epididymal epithelium. This cellular portion also presented electron-lucid vesicles of different sizes that may correspond to vesicles enriched with proteins related to proton secretion. In addition to the findings regarding clear cells’ structural organization, basal cells presented scarce cytoplasm and no axiopodia. Taken these findings together, we suggest that the mechanism of luminal acidification may have other pathways in D. rotundus than those described in rodents.Item Isolation, primary culture and morphological characterization of oenocytes from Aedes aegypti pupae(Tissue and Cell, 2011-01-20) Martins, G.F.; Guedes, B.A.M.; Silva, L.M.; Serrão, J.E.; Fortes-Dias, C.L.; Ramalho-Ortigão, J.M.; Pimenta, P.F.P.Oenocytes are ectodermic cells that participate in a number of critical physiological roles such as detoxification and lipid storage and metabolism in insects. In light of the lack of information on oenocytes from Aedes aegypti and the potential role of these cells in the biology of this major yellow fever and dengue vector, we developed a protocol to purify and maintain Ae. aegypti pupa oenocytes in primary culture. Ae. aegypti oenocytes were cultured as clustered and as isolated ovoid cells with a smooth surface. Our results demonstrate that these cells remain viable in cell culture for at least two months. We also investigated their morphology in vivo and in vitro using light, confocal, scanning and transmission electron microscopes. This work is the first successful attempt in isolating and maintaining Ae. aegypti oenocytes in culture, and a significant step towards understanding the role of this cell type in this important disease vector. The purification and the development of primary cultures of insect oenocytes will allow future studies of their metabolism in producing and secreting compounds.