Anatomia, histologia, histoquímica e ultra-estrutura das glândulas salivares cefálicas de abelhas eussociais (Hymenoptera, apidae): Silvana Beani Poiani. -
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Data
2007-08-09
Autores
Poiani, Silvana Beani [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
As abelhas eussociais apresentam uma variedade de glândulas exócrinas distribuídas por todo o corpo, cujos produtos são usados no desempenho de suas tarefas. Em todos os insetos, pares de glândulas estão associados às peças bucais e, nas abelhas, as principais destas glândulas estão ligadas ao lábio (glândulas labiais ou salivares), às mandíbulas (glândulas mandibulares) e ao assoalho da cavidade bucal (glândulas hipofaríngeas). O par de glândulas labiais ou salivares dos insetos adultos localiza-se no tórax, porém ramos cefálicos se desenvolvem em algumas espécies de abelhas, formando as glândulas salivares cefálicas, as quais são plenamente desenvolvidas em algumas espécies da subfamília Apinae. O presente trabalho estudou a histologia e a histoquímica das glândulas salivares cefálicas de fêmeas e machos, em diferentes idades, de Apis mellifera e Scaptotrigona postica. Os resultados mostram que a histologia das glândulas salivares cefálicas difere entre as espécies. Enquanto as células alveolares e dos ductos são predominantemente cúbicas nas operárias e rainhas de A. mellifera, em S. postica passam de cúbicas a escamosas conforme a operária envelhece, e os ductos, nesta espécie, são invariavelmente constituídos por células escamosas. Machos recém-emergidos de A. mellifera apresentam a glândula com grau de desenvolvimento semelhante ao das operárias recém-emergidas de sua espécie, porém conforme atingem a maturidade sexual, ocorre regressão glandular de modo que nem sempre foi possível encontrá-la. Por outro lado, machos velhos de S. postica são dotados de glândulas tão desenvolvidas quanto as fêmeas de sua espécie...
Eusocial bees present a variety exocrine glands disperse on body whose products are used in tasks performance. Pairs of glands are attached at mouthparts in whole insects and, in bees, main glands are attached to labium (labial or salivary glands), mandibules (mandibular glands) and floor mouth cavity (hiphofaringeal glands). Adult insects labial or salivary pair glands are located in torax. However cephalic branchs develop in some bees species, composing the cephalic salivary glands which are completely develop in some species of Apinae subfamily. The present work studied the histology and histochemic of females and males cephalic salivary glands of Apis mellifera and Scaptotrigona postica in different ages. The histology results showed cephalic salivary glands differs between species. While cells of alveoli and ducts are primarily cuboidal in workers and queens of A. mellifera, in workers of S. postica, cells undergo of cuboidal to squamous with age and ducts invariably consist of squamous cells. Newly emerged males of A. mellifera exhibit glands in developmental stages similar to that of newly emerged workers of their species. However, as males become sexually mature, the gland degenerates difficulting its localization. Nevertheless, old males of S. postica present glands as developed as those of females of their species. Histochemical techniques demonstrate no protein inclusions and indicated the secretion of glands of workers and queens of both species were neutral lipids. The secretion gradually accumulates in the lumen of alveoli, and as a result, foragers and egg-laying queens exhibit more turgid alveoli that younger individuals... (Complete abstract click electronic access below)
Eusocial bees present a variety exocrine glands disperse on body whose products are used in tasks performance. Pairs of glands are attached at mouthparts in whole insects and, in bees, main glands are attached to labium (labial or salivary glands), mandibules (mandibular glands) and floor mouth cavity (hiphofaringeal glands). Adult insects labial or salivary pair glands are located in torax. However cephalic branchs develop in some bees species, composing the cephalic salivary glands which are completely develop in some species of Apinae subfamily. The present work studied the histology and histochemic of females and males cephalic salivary glands of Apis mellifera and Scaptotrigona postica in different ages. The histology results showed cephalic salivary glands differs between species. While cells of alveoli and ducts are primarily cuboidal in workers and queens of A. mellifera, in workers of S. postica, cells undergo of cuboidal to squamous with age and ducts invariably consist of squamous cells. Newly emerged males of A. mellifera exhibit glands in developmental stages similar to that of newly emerged workers of their species. However, as males become sexually mature, the gland degenerates difficulting its localization. Nevertheless, old males of S. postica present glands as developed as those of females of their species. Histochemical techniques demonstrate no protein inclusions and indicated the secretion of glands of workers and queens of both species were neutral lipids. The secretion gradually accumulates in the lumen of alveoli, and as a result, foragers and egg-laying queens exhibit more turgid alveoli that younger individuals... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Abelha, Abelha-européia, Lipidios, Abelha - Glândula labial, Feronômio, Bee - Labial gland, Pheromone
Como citar
POIANI, Silvana Beani. Anatomia, histologia, histoquímica e ultra-estrutura das glândulas salivares cefálicas de abelhas eussociais (Hymenoptera, apidae): Silvana Beani Poiani. -. 2007. ii, 123 f. Dissertação (mestrado) - Universidade Estadual Paulista, Instituto de Biociências de Rio Claro, 2007.