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Data/hora: 19/05/2024 01:27:19

Comportamento dos nucléolos e mitocôndrios durante a ovogênese de peixes teleósteos de àgua doce
Provedor de dados: Acta Amazonica
Autores: Cruz-Landim,Carminda da; Cruz-Höfling,Maria Alice da.
Resumo Os ovócitos de peixes teleósteos em fase pré-vitelogênica apresentam numerosos nucléolos localizados perifericamente no núcleo. Existem evidências morfológicas da passagem do material destes nucléolos para o citoplasma onde se associa a mitocôndrios e se dispersa, mantendo sempre a associação. Este material pode ser detectado no ovocito mesmo após o início da deposição de vitelo possivelmente vindo a constituir o plasma germinativo.
Tipo: Info:eu-repo/semantics/article
Ano: 1979
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671979000700723

Diferenças ultra-estruturais entre bexigas natatórias de peixes teleósteos de respiração aquática e respiração aérea facultativa
Provedor de dados: Acta Amazonica
Autores: Cruz-Landim,Carminda da; Cruz-Höfling,Maria Alice da.
Resumo O presente trabalho refere-se às diferenças infra-estruturais entre a bexiga natatória do jeju (teleósteo de respiração aérea facultativa) e do aruanã (teleósteo de respiração exclusivamente aquática ou branquial). Histologicamente, em ambos os casos, a parede da bexiga natatória se mostrou constituída por um epitélio, limitando a luz, com uma lâmina própria de tecido conjuntivo muito rico em colágeno, seguida de uma camada de musculatura lisa e uma adventícia. Os resultados sugerem que a adaptação à função respiratória na bexiga natatória do jeju refletem-se na diminuição da espessura da cobertura epitelial da câmara posterior, na presença desse epitélio de possíveis substâncias surfactantes que são eliminadas para a luz e na grande vascularização...
Ano: 1979
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671979000300317

Comparações morfológicas e histoquímicas da bexiga natatória de peixes teleósteos de respiração aquática e respiração aérea
Provedor de dados: Acta Amazonica
Autores: Cruz-Höfling,Maria Alice da; Cruz-Landim,Carminda da; Patelli,Alba Sanches.
Resumo As bexigas natatorias do Hoplerythrinus unitaenitus (jeju), eritrinídeo de respiração aérea facultativa e do Osteoglossum bicirrhosum (aruanã), osteoglossídeo de respiração aquática, foram comparadas morfológica e histoquimicamente. No jeju, a bexiga tem função respiratória, enquanto no aruanã é um órgão hidrostático. Ambos são fisóstomos e a bexiga natatória é dividida em duas câmaras, cujas paredes são constituídas por três túnicas. Existem características morfológicas próprias de cada espécie, particularmente em relação à túnica interna: no jeju forma pregas aumentando assim a sua superfície; apresenta rico plexo capilar sub-epitelial e coxins musculares laterais. Os testes histoquímicos mostram que a bexiga natatória do jeju, contém...
Ano: 1980
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671980000100147

Estudo de mecanismos envolvidos na incorporação de proteínas durante a ovogênese em Anopheles
Provedor de dados: Acta Amazonica
Autores: Ronchi-Teles,Beatriz; Tadei,Wanderli Pedro; Cruz-Landim,Carminda da; Meirelles,José Wilson dos Santos.
Ovários de Anopheles triannulatus foram dissecados 24 e 48 horas após as fêmeas terem sido alimentadas com fonte protéica (sangue), afim de se estudar o seu efeito sobre a ovogênese. Foram analisadas secçõees hisiológicas, ao nível da ultraestrutura, e observadas as mudanças morfológicas que ocorrem nas interfaces células foliculares-ovócito e célula folicular-célula. Foram observados aspectos estruturais que corroboram a hipótese da produção exógena das proteínas do vitelo. Os grânulos de vitelo originaram-se principalmente por condensação das vesículas pinocíticas formadas na superfície do ovócito.
Tipo: Info:eu-repo/semantics/article
Ano: 1988
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671988000400105

Estudo comparativo da área ocupada pelos corpos pedunculados no cérebro de duas espécies de abelhas (Hymenoptera, Apoidea)
Provedor de dados: Zoologia
Autores: Abdalla,Fábio Camargo; Cruz-Landim,Carminda da.
The present study compare the size of the corpora pedunculata (mushroom bodies) of Exomalopsis aureopilosa a quasi-social specie and Apis mellifera a eusocial specie of bees. The aim was to correlate the developmental degree of such structures with the behavior complexity. The results show that the female specimens of both species have the corpora pedunculata with same relative size. However the area occupied by the neurones cellular bodies (glomeruli) is greater in the workers of A. mellifera. In other way in E. aureopilosa the total size of the corpora pedunculata is larger in females, but the glomeruli area is relatively larger in the male.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hymenoptera; Apoidea; Corpora pedunculata; Glomeruli; Castes; Behavior.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000400016

Note on glands present in meliponinae (Hymenoptera, Apidae) bees legs
Provedor de dados: Zoologia
Autores: Cruz-Landim,Carminda da; Moraes,Regina Lúcia Morelli Silva de; Salles,Heliana Clara; Reginato,Rejane Daniele.
The present paper reports the presence of glandular structures in legs of some stingless bee species. The glands appear as: the epidermis transformation in a glandular epithelium as in basitarsus, an epithelial sac inside the segment as in the femur of queens or in the last tarsomere, as round glandular cells, scattered or forming groupments. The saculiform gland of femur is present only in queens, the other glands are present in males, queens and workers of the studied species, apparently without any type of polymorphism. This occurrence seems indicate that the function of these glands have not to do with the sociality or specific behavior of castes.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hymenoptera; Stingless bees; Legs; Glands.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000100014

Ocorrência e morfologia de glândulas nas pernas de Centris e Epicharis (Hymenoptera, Anthophoridae)
Provedor de dados: Zoologia
Autores: Franco,Aldirene Costa; Cruz-Landim,Carminda da.
The presence of glands in insect legs is largely difunded. In bees they are present in solitary and social species. In Centris and Epicharis three different types of glandular structures were found: bag-shaped structures in males femur and tibia, unicelular glandular cells in ali segments of all leg pairs in males and females, but more developed in females, and differentiated epidermis in the basitarsus of both sexes. The tarsal gland present in the distal tarsomere of all legs of males and females are a special type of the bag-shaped structure. The nature of secretion and it use is unknow, but some morphological and stainning properties indicate a lipidic nature.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hymenoptera; Anthophoridae; Bee; Glands; Legs; Secretion.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000600001

Changes in the structure and pigmentation of the eyes of honeybee (Apis mellifera L.) queens with the "limão" mutation
Provedor de dados: Genetics and Molecular Biology
Autores: Chaud-Netto,José; Cruz-Landim,Carminda da.
This study describes the ultrastructural differences between the compound eyes of ch li/ch li and Ch/ch li honeybee queens. Heterozygous "limão" bees had an almost normal ultrastructural organization of the ommatidia, but there were some alterations, including small vacuoles in the crystalline cones and a loss of pigment by primary pigmentary cells. In homozygous bees many ommatidia had very deformed crystalline cones and there were some bipartite rhabdoma. There was a reduction in the amount of pigment in the primary and secondary pigmentary cells and receptor cells (retinulae) of mutant eyes. However, the eyes of both heterozygous and homozygous queens had the same type of pigment granules. Certain membrane-limited structures containing pigment granules...
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100017

Ovarian development in Meliponine bees (Hymenoptera: Apidae): the effect of queen presence and food on worker ovary development and egg production
Provedor de dados: Genetics and Molecular Biology
Autores: Cruz-Landim,Carminda da.
Morphological studies of Meliponine worker ovaries in five species indicated a possible stimulatory effect of the queen on ovary development and on the production of trophic eggs in some of them. There are also indications that the queen inhibits the production of fertile eggs by the workers. This inhibition may involve a delay in the development of fertile eggs by the worker, until she is out of direct contact with the queen, or a lack of ovary development in the queen's presence, as seen in Leurotrigona muelleri. The evolutionary tendency toward inability to produce fertile eggs has its extreme representation in the pupal worker ovary reabsorption found in Frieseomelitta silvestri. On the other hand, the finding, in some species, of dwarf queens with the...
Tipo: Info:eu-repo/semantics/article
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100015

Comparative study of wax glands in four Meliponini bees (Hymenoptera, Apidae) producing different quantities of wax
Provedor de dados: Iheringia Série Zoologia
Autores: Cavalcante,Vagner Melo; Oliveira,Vagner Tadeu Paes de; Cruz-Landim,Carminda da.
The developmental degree of the wax glands was compared in four Meliponini bees, that produce different quantities of wax. The histological data and height average of the wax epithelium during the time in which the maximum production of wax is expected, are in accordance with the rates of wax produced by the species. In Lestrimelitta limao (Smith, 1863) a species which has cleptobiotic habits, and frequently rob wax from the attacked colonies, the height of wax epithelium was the lowest among the studied species. The cells seem to show an abnormal vacuolated cytoplasm, in the phase in which they would be producing wax.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stingless bees; Wax glands; Development; Wax production.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212000000200010

Organization of the cysts in bee (Hymenoptera, Apidae) testis: number of spermatozoa per cyst
Provedor de dados: Iheringia Série Zoologia
Autores: Cruz-Landim,Carminda da.
The morphology of the cyst cells in Apis mellifera Linné, 1758, Scaptotrigona postica Latreille, 1804, and Melipona bicolor bicolor Lepeletier, 1836 testis, as well as the average number of spermatic cells are reported. The data indicates a supporting and nourrishing role of the cyst cells to the developing cystocytes. The counts of immature spermatozoa in the cysts show an average of 202.8 ± 21.2 spermatozoa for A. mellifera, 117.4 ± 8.68 for S. postica and 88.8 ± 15.57 for M. bicolor, which predict the occurrence of 8 mitotic cycles in the cystocytes of A. mellifera and 7 in the meliponines, considering that only one spermatozoom originates of each final spermatogonium.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyst cell; Cell number average; Testis; Bees.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000200025

Ultrastructure of ovarian follicular epithelium of the amazonian fish Pseudotylosurus microps (Gunther) (Teleostei, Belonidae): I. the follicular cells cycle of development
Provedor de dados: Zoologia
Autores: Cruz-Landim,Carminda da; Cruz-Hofling,Maria Alice da.
The present paper deals with the changes on ultrastructural features of the follicular cells along the growth of the oocyte of Pseudotylosurus microps (Gunther, 1868). The epithelium pass from single squamous to pseudostratified and finally cylindric. Remarkable are the changes in the nuclear shapes, the increasing amount of rough endoplasmic reticulum and the formation of large lipid deposits in the follicular cells by the end of vitellogenic phase. Very peculiar intercellular deposits forms between the perinucleolar and vitellogenic phase of oocyte maturation. Although largely referred to in the specialized literature, our attempts to correlate the follicular cells changes with the formation of the oocyte envelopes or even with an endocrine function are...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pseudotylosurus microps; Follicular epithelium; Ultrastructure; Teleost.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000100010

Size differences in the Dufour gland of Apis mellifera Linnaeus (Hymenoptera, Apidae) between and within the female castes
Provedor de dados: Zoologia
Autores: Abdalla,Fábio Camargo; Cruz-Landim,Carminda da.
The Dufour gland is found closely associated with the sting apparatus of all hymenopteran females, playing multiple roles among bees. In Apis mellifera Linnaeus, 1758 the gland is connected to the dorsal vaginal wall and, in queens, it produces egg-marking pheromones. In workers the function of this gland is unknown, except by its capacity to mimic the queen secretion in egg-laying workers. In an attempt to understand the development and to substantiate the present knowledge about the Dufour gland in A. mellifera, a morphometric study of the gland between and within the female castes was made. Glands of workers and queens with different ages and life stages were dissected and measured with an ocular micrometer adapted to a stereoscope. The results showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apis mellifera; Dufour gland; Exocrine glands.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500009

Ultra-estrutura de glândulas abdominais tegumentares em Oxaea flavescens (Hymenoptera, Andrenidae, Oxaeinae)
Provedor de dados: Iheringia Série Zoologia
Autores: Guerino,Adriane Cristina; Cruz-Landim,Carminda da.
The sternal glands of the abdomen of Oxaea flavescens (Klug, 1807) consist of class III glandular cells around a reservoir constituted by branched folds of the intersegmental membrane of segments III, IV and V. The gland cells are rich in rough endoplasmic reticulum and produce a secretion with mucous aspect. The treatment with oxidated osmium and ruthenium red showed numerous Golgi regions in the cell and carbohydrates absorption from the haemolymph, respectively. The high degree of development of the glands suggests an important function to the species, although still unknown.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tegumentary glands; Exocrine glands; Sternal glands; Oxaea.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212002000400006

Determinação das castas em Scaptotrigona postica (Latreille) (Hymenoptera, Apidae, Meliponini): diferenciação do ovário
Provedor de dados: Zoologia
Autores: Santos,Thaís da Cruz Alves dos; Cruz-Landim,Carminda da.
Both castes of Scaptotrigolia postica (Latreille, 1804) possess four ovarioles in each ovary. Queen and workers have the same ovarian development during the larvallife, but in lhe late larval stage the queen ovary beco me larger. During pupation a higher rate of cell division is observed in queen ovarioles and a higher rale of cell death in workers. Newly emerged workers have short ovarioles with differenriatcd germarium and vitellarium while queens have very long ovarioles with only germarium. Caste deterrnination in rhis species of bee is trophic, but lhe food does not differ in quality, only in quantiry. The food differences only beco me effecri ve by the end of larval stage when the queen larvae have lhe opportunity of eat more. In this way lhe ovary...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stingless beco castes; Ovary differentiation; Cell division; Cell dearh.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300007

Ocorrência e morfologia de glândulas tegumentares no abdome de algumas abelhas (Hymenoptera: Apidae): um estudo comparado
Provedor de dados: Neotropical Entomology
Autores: Guerino,Adriane C.; Cruz-Landim,Carminda da.
No presente trabalho foi estudada a ocorrência, distribuição e morfologia de glândulas tegumentares do abdome em Exomalopsis auropilosa Spinola, Centris fuscata Lepeletier, Epicharis flava Friese e Xylocopa (Neoxylocopa) suspecta Moure &amp;amp; Camargo. Os resultados mostraram a ocorrência de glândulas epiteliais (classe I) e unicelulares (classe III) com distribuição dorsal (tergais) e ventral (esternais) sem que se pudesse caracterizar um padrão relacionável com a posição filogenética ou grau de sociabilidade. No entanto, verificou-se uma tendência para maior número de glândulas em espécies com algum grau de sociabilidade como E. auropilosa e X. suspecta.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glândula epitelial; Glândula unicelular; Glândula tergal; Glândula esternal.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2003000200010

Protein content and electrophoretic profile of fat body and ovary extracts from workers of Melipona quadrifasciata anthidioides (Hymenoptera, Meliponini)
Provedor de dados: Iheringia Série Zoologia
Autores: Oliveira,Vagner T. Paes de; Cruz-Landim,Carminda da.
Workers of Melipona quadrifasciata anthidioides (Lepeletier, 1836) develop their ovaries and lay eggs, therefore the production of vitellogenin is expected. In electrophoretic profiles only fat body extracts from nurse workers and ovary extracts from newly-emerged workers show protein with molecular mass similar to vitellogenin. However, an increase in the protein content was detected in forager fat body. This increase was attributed to storage of vitellogenin or other proteins in the previous phase and not discharged into the hemolymph or to an effect of the increased titre of juvenile hormone in this phase of worker life over the fat body functioning.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stingless bees; Fat body; Ovary; Vitellogenin; Oogenesis.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212004000400010

Electrophoretic protein pattern and acid phosphatase activity in the midgut extracts of Apis mellifera L. (Hymenoptera: Apidae) during metamorphosis
Provedor de dados: Neotropical Entomology
Autores: Cavalcante,Vagner M.; Cruz-Landim,Carminda da.
The electrophoretic pattern of proteins and the activity of acid phosphatase were described in the midgut extracts during the post-embryonic stages of Apis mellifera L. in order to stablish a correlation with the metamorphosis events. The results show the greatest variation in proteic electrophoretical bands during prepupal stage and the smallest variation during the brown eyed pupae stage. The acid phosphatase activity was higher during the larval last instar and lower in white eyed pupae. The greatest variety of bands during the prepupal stage coincides with the histolysis of the larval midgut epithelium and the lowest variability in the brown eyed pupa coincides with the end of the midgut differentiation. In another hand, the greatest phosphatase...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Differentiation; Enzymes; Histolysis; Larva; Prepupa; Post-embryonic development; Pupa.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000200007

Comparative anatomy of the male reproductive internal organs of 51 species of bees
Provedor de dados: Neotropical Entomology
Autores: Ferreira,Amilton; Abdalla,Fábio C.; Kerr,Warwick E.; Cruz-Landim,Carminda da.
The anatomy of the internal organs of the male reproductive apparatus (MRA) of adults and pupae was compared among 51 species of bees, including representatives of six families. Four different types of MRA were found. The type I is present in males of the less derived families (Colletidae, Andrenidae, and Halictidae) and is characterized by three seminiferous tubules per testis, which are almost completely enveloped by the scrotal membrane. The type II is an intermediary between types III and I and is present in Melittidae and Megachilidae, as well as in some Apidae studied, being characterized by post-vesicular deferent ducts outside the scrotal membrane and by three or four seminiferous tubules per testis, except for Apis mellifera L., which has a...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Accessory gland; Genitalia; Morphology.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000500005

Caracterização das glândulas mandibulares nas diferentes classes de adultos de Scaptotrigona postica Latreille (Hymenoptera: Apidae)
Provedor de dados: Neotropical Entomology
Autores: Gracioli-Vitti,Luciana F.; Abdalla,Fábio C.; Cruz-Landim,Carminda da.
As glândulas mandibulares de operárias recém-emergidas, nutridoras e campeiras, rainhas virgens e fisogástricas, e machos maduros de Scaptotrigona postica Latreille foram estudadas histológica e morfometricamente. Estas glândulas apresentam diferenças histológicas características para cada idade e/ou função do indivíduo. De acordo com a morfometria conclui-se que as glândulas mandibulares possuem um ciclo secretor determinado, no qual a secreção começa a ser produzida nas operárias recém-emergidas, e acumula-se no citoplasma e reservatório da glândula das operárias nutridoras. Nas operárias campeiras o citoplasma encontra-se bastante vacuolizado, o que foi interpretado como resultado da eliminação da secreção. Rainhas fisogástricas apresentaram as maiores...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomia; Histologia; Casta; Sexo; Estado funcional.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000600007

Occurrence, morphology and ultrastructure of the Dufour gland in Melipona bicolor Lepeletier (Hymenoptera, Meliponini)
Provedor de dados: Revista Brasileira de Entomologia
Autores: Abdalla,Fábio Camargo; Cruz-Landim,Carminda da.
The occurrence, morphology and ultrastructure of the Dufour gland in Melipona bicolor Lepeletier, 1836 are presented. The Dufour gland is not present in workers. In virgin queens the gland cells show characteristics of low activity, which are described in the text. In physogastric queens the gland epithelium is higher and the cells more active than in virgin queens, showing numerous basal plasmic membrane invaginations impregnated by an electrondense material, increased apical invaginations and accumulation of substances that will be released to the gland lumen in the subcuticular space. Therefore, the data show that the Dufour gland is more developed in physogastric than in virgin queens, indicating a possible involvement of the Dufour gland in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dufour gland; Melipona bicolor; Meliponine; Morphology; Ultrastructure.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262004000100002

Tegumentary epithelial glands in the abdomen of virgin and physogastric queens of the stingless bee Scaptotrigona postica Latreille (Meliponini: Trigonina)
Provedor de dados: Neotropical Entomology
Autores: Abdalla,Fábio C.; Cruz-Landim,Carminda da; Gracioli,Luciana F.
In the eusocial worker bees, portions of the epithelium of the abdominal epidermis may become hypertrophied and glandular, and produce the wax used to build the brood alveoli. In meliponine bees, the presence of similar epithelium was already observed in the queens, but its function is still unknown. Would this epithelium have homologous function in the workers? May the queens display other functions, besides reproduction, related to those considered exclusive of workers? In order to contribute to solve these questions, a histological and ultrastructural study of the tegumentary epithelial glands of the third tergite was carried out in virgins and physogastric queens of Scaptotrigona postica Latreille. The glandular tegumentary epithelium was easily...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wax; Meliponine; Histology; Microscopy.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000100006

Ocorrência, morfologia e ultra-estrutura da glândula de Dufour de Scaptotrigona postica Latreille (Hymenoptera: Apidae)
Provedor de dados: Neotropical Entomology
Autores: Abdalla,Fábio C.; Cruz-Landim,Carminda da.
A glândula de Dufour é uma glândula acessória do aparelho reprodutivo feminino das abelhas. Nas abelhas neotropicais sem ferrão, tem sido pouca estudada sob todos os aspectos: morfológico, ontogenético e bioquímico. Na tentativa de colaborar com o conhecimento dessa glândula em abelhas sem ferrão, foi realizado um estudo da sua ocorrência, morfologia e desenvolvimento em Scaptotrigona postica Latreille. Os resultados mostraram que ela se encontra ausente nas operárias, como ocorre em muitas outras espécies desse grupo. Nas rainhas, as células glandulares parecem mais ativas nas virgens, possuindo uma desenvolvida rede de retículo endoplasmático liso tubular, grânulos de secreção e polirribossomos dispersos no citoplasma, além de apresentarem núcleos...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Glândula exócrina; Glândula básica; Meliponíneo.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000100007

Ocorrência e morfologia de glândulas tegumentares no abdome de Melissoptila richardiae (Bertoni &amp;amp; Scrottky) (Hymenoptera, Apidae, Eucerini)
Provedor de dados: Revista Brasileira de Entomologia
Autores: Cruz-Landim,Carminda da; Oliveira,Vagner T. Paes de.
Foram estudadas a ocorrência e a morfologia de glândulas tegumentares presentes no abdome de fêmeas de Melissoptila richardiae. Os resultados mostram que nesta espécie, células glandulares da classe III são encontradas de duas formas: isoladas nos tergitos e esternitos III e IV e formando um aglomerado de unidades glandulares bilateralmente, entre os segmentos III e IV, os quais liberam seu produto de secreção em um reservatório originado a partir da membrana intersegmental. Os resultados sugerem que o produto secretado é lipídico e, provavelmente volátil.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Esternitos; Glândulas abdominais; Reservatório; Tergitos; Voláteis.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262005000400001

Histologia e ultra-estrutura do vaso dorsal de Scaptotrigona postica (Hymenoptera, Apidae) em operárias e rainhas de diferentes idades
Provedor de dados: Iheringia Série Zoologia
Autores: Poiani,Silvana B.; Cruz-Landim,Carminda da.
O vaso dorsal é um órgão tubular localizado na região mediano-dorsal do corpo dos insetos, abaixo do tegumento. Fez-se um estudo de microscopia de luz e eletrônica de transmissão da porção abdominal do vaso dorsal, o coração, em uma espécie de abelha indígena. Foram estudadas operárias e rainhas em diferentes idades. O coração está localizado no sinus pericárdico. A parede cardíaca é formada por fibras musculares estriadas e apresenta aberturas ou ostíolos providos de válvulas. A fibra cardíaca contém miofibrilas arranjadas irregularmente, núcleos alongados ou redondos, mitocôndrias grandes e numerosas, e depósitos de glicogênio. Em operárias e rainhas longevas, as fibras encontram-se em degeneração, evidenciada por vacúolos autofágicos, alterações...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abelha; Músculo cardíaco; Alterações celulares; Envelhecimento.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000100021

Ultrastructural modifications in the venom glands of workers of Apis mellifera L. (Hymenoptera: Apidae) promoted by topical application of juvenile hormone
Provedor de dados: Neotropical Entomology
Autores: Roat,Thaisa C.; Nocelli,Roberta C.F.; Cruz-Landim,Carminda da.
The present study analyzed, the influence of the treatment with juvenile hormone on the ultrastructure of Apis mellifera L. workers' venom glands. Newly emerged workers received topical application of 1 µl of juvenile hormone diluted in hexane, in the concentration of 2 µg/µl. Two controls were used; one control received no treatment (group C1) and other received topical application of 1 µl of hexane (group C2). The aspect of the glandular cells, in not treated newly emerged workers, showed that they are not yet secreting actively. Cellular modifications happened according to the worker age and to the glandular area considered. The most active phase of the gland happened from the emergence to the 14th day. At the 25th day the cells had already lost their...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Secretory cycle; Glandular degeneration; Hexane; Bee.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2006000400007

Morphological aspects of cell reabsorption in laying queens and workers of Apis mellifera (Hymenoptera, Apidae)
Provedor de dados: Iheringia Série Zoologia
Autores: Patrício,Karina; Cruz-Landim,Carminda da.
The occurrence of cell reabsorption in the ovaries of queens in several rates of laying eggs, artificially impeded of laying, and in nurse workers, of Apis mellifera (Linnaeus, 1758), was studied with light (LM) and transmission electron microscopy (TEM). Two types of structures were described and named by analogy with vertebrates ovarian structures, as corpus luteus, when resulting from the reabsorption of the follicular cells after ovulation, and corpus atresicus when resulting from total follicular reabsorption at any oocyte developmental stage. These structures have the same morphological characteristics and physiological signification in both castes. The corpus luteus occurrence indicates ovulation and its number is correspondent to the queen's rates...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corpus luteus; Corpus atresicus; Oviposition; Histology; Ultrastructure.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212008000400001

Efeitos da aplicação tópica de hormônio juvenil sobre o desenvolvimento dos ovários de larvas de operárias de Apis mellifera Linnaeus (Hymenoptera, Apidae)
Provedor de dados: Revista Brasileira de Entomologia
Autores: Antonialli-Junior,William Fernando; Cruz-Landim,Carminda da.
A influência do hormônio juvenil sobre o desenvolvimento do ovário de larvas de operárias de Apis mellifera foi analisada levando em conta a determinação trófica das castas, segundo a qual a alimentação larval é controlada pelas operárias de maneira a promover uma diferenciação de castas controlada pela produção e disponibilidade desse hormônio. A hipótese testada é que a ação do hormônio juvenil seja capaz de proteger ou prevenir a degeneração nos ovários das larvas de operárias. Foi feita aplicação tópica de 1 ml de hormônio dissolvido em hexano na concentração de 1 mg/ml do segundo até o quinto dia de vida larval, e a morfologia dos ovários avaliada nos dias subseqüentes à aplicação até ao sexto dia de vida larval. Como controles foram utilizadas larvas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Castas; Desenvolvimento pós-embrionário; Número de ovaríolos; Operária.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262009000100025

Changes in the size of cephalic salivary glands of Apis mellifera and Scaptotrigona postica (Hymenoptera: Apidae) queens and workers in different life phases
Provedor de dados: Revista Brasileira de Zoologia
Autores: Poiani,Silvana B.; Cruz-Landim,Carminda da.
The bee species of the Apinae, in addition to the thoracic salivary glands, possess a pair of cephalic glands originating as branches of the excretory duct that crosses the head. These glands are known as cephalic salivary or labial cephalic glands. The degree of development of these glands in newly emerged, nurse and forager workers and virgin and egg-laying queens of Apis mellifera Linnaeus, 1758 and Scaptotrigona postica Latreille, 1807 were evaluated by measuring the secretory alveolar units. The area of the secretory alveoli, measured in total gland preparations, was used to evaluate differences in size. In both species, gland size was found to increase progressively from newly emerged workers to foragers and from virgin to egg-laying queens. A...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bee; Labial gland; Morphometry; Pheromone; Salivary system.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600018

Cephalic salivary glands of two species of advanced eusocial bees (Hymenoptera: Apidae): morphology and secretion
Provedor de dados: Revista Brasileira de Zoologia
Autores: Poiani,Silvana B.; Cruz-Landim,Carminda da.
Some adult eusocial bees have a pair of cephalic salivary glands (CSG) in addition to the thoracic labial or salivary gland pairs. This paper deals with variations in morphological features and secretion production of the CSG of females and males of Apis mellifera Linnaeus, 1758 and Scaptotrigona postica Latreille, 1807. The following life stages were studied: newly emerged, nurse, and forager workers; newly emerged and egg-laying queens; and newly emerged and sexually mature males. The histological results showed that the CSG differs between the two species in the following features: while alveoli and duct cells are cuboidal in workers and queens of A. mellifera, they change from cuboidal to flat in S. postica as the workers age. The glands of newly...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apis mellifera; Histochemical; Labial gland; Lipid; Scaptotrigona postica.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000600021

Ultrastructural detection of lipids in the cephalic salivary glands of Apis mellifera and Scaptotrigona postica (Hymenoptera: Apidae) workers
Provedor de dados: Revista Brasileira de Zoologia
Autores: Poiani,Silvana Beani; Cruz-Landim,Carminda da.
ABSTRACT Secretory cells of the cephalic salivary glands (CSGs) of eusocial bees produce and accumulate lipid-like secretion in the lumens of their alveoli. Correspondingly, secretory cells present typical ultrastructural features of lipid-compound producers. Previous work on bees has revealed inter-specific differences in the chemical composition of secretion, and the production mechanisms and secretory cycle of secretory cells. In this work a comparative analysis of the mechanisms of lipid storage in the CSGs of Apis mellifera (Linnaeus, 1758) and Scaptotrigona postica (Latreille, 1807) workers was carried out. The ultrastructural location of lipids was ascertained using imidazole-osmium (IO), using individuals in different stages of their life cycles....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytochemistry; Excretory; Imidazole-osmium; Insect; Salivary system.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000300901