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| Registros recuperados: 31 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100017 |
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| 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 |
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| 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 |
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| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572000000100015 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 31 | |
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