Consulta: subjectFacets:"Melipona bicolor"
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Data/hora: 09/06/2024 16:42:32

The mitochondrial genome of the stingless bee Melipona bicolor (Hymenoptera, Apidae, Meliponini): sequence, gene organization and a unique tRNA translocation event conserved across the tribe Meliponini
Provedor de dados: Genetics and Molecular Biology
Autores: Silvestre,Daniela; Dowton,Mark; Arias,Maria Cristina.
At present a complete mtDNA sequence has been reported for only two hymenopterans, the Old World honey bee, Apis mellifera and the sawfly Perga condei. Among the bee group, the tribe Meliponini (stingless bees) has some distinction due to its Pantropical distribution, great number of species and large importance as main pollinators in several ecosystems, including the Brazilian rain forest. However few molecular studies have been conducted on this group of bees and few sequence data from mitochondrial genomes have been described. In this project, we PCR amplified and sequenced 78% of the mitochondrial genome of the stingless bee Melipona bicolor (Apidae, Meliponini). The sequenced region contains all of the 13 mitochondrial protein-coding genes, 18 of 22...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melipona bicolor; Meliponini; Social insects; Mitochondrial genome; Gene rearrangements.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000300010

Mitochondrial tRNA gene translocations in highly eusocial bees
Provedor de dados: Genetics and Molecular Biology
Autores: Silvestre,Daniela; Arias,Maria Cristina.
Mitochondrial gene rearrangement events, especially involving tRNA genes, have been described more frequently as more complete mitochondrial genome sequences are becoming available. In the present work, we analyzed mitochondrial tRNA gene rearrangements between two bee species belonging to the tribes Apini and Meliponini within the "corbiculate Apidae". Eleven tRNA genes are in different genome positions or strands. The molecular events responsible for each translocation are explained. Considering the high number of rearrangements observed, the data presented here contradict the general rule of high gene order conservation among closely related organisms, and also represent a powerful molecular tool to help solve questions about phylogeny and evolution in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: MtDNA; Melipona bicolor; Mitogenomics; Gene order; Eusociality.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572006000300030

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

Comparative study of mandibular glands of Melipona bicolor queens obtained from polygynic and monogynic colonies
Provedor de dados: Biocell
Autores: Fioretti Gracioli-Vitti,Luciana; Camargo Abdalla,Fábio; Morelli Silva De Moraes,Regina Lúcia.
The aim of the present study was analyze, by histological and morphometrical studies, mandibular glands of Melipona bicolor queens collected from monogynic and polygynic colonies and compare their level of development. The results showed that the glands of physogastric queens from monogynic colony present a higher level of activity in relation to the queens of polygynic colonies; this is explained by the fact that just a unique queen controls the monogynic colony. In the polygynic colonies, the queens may divide such control to each other.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melipona bicolor; Mandibular gland; Morphology; Polygynic colonies.
Ano: 2005
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452005000100001