Consulta: subjectFacets:"Gland"
Registros recuperados: 9
Data/hora: 09/06/2024 06:30:35

Cytochemical study of Rhodnius neglectus and Rhodnius prolixus salivary gland cells (Hemiptera, Triatominae)
Provedor de dados: Iheringia Série Zoologia
Autores: Anhê,Ana C. B. M.; Lima-Oliveira,Ana P. M.; Azeredo-Oliveira,Maria T. V.
Triatomines are hematophagous bugs of medical interest in South and Central America, where they may act as invertebrate hosts of the hemoflagellate protozoa Trypanosoma cruzi (the causative of Chagas’ disease) and Trypanosoma rangeli (Tejera, 1920). Triatomines of Rhodnius genus have salivary gland formed by two close and independent units: the principal and the accessory. This gland secretes saliva that abounds in substances that facilitate and permit feeding. Despite this importance, there are few reports on its cytochemistry. In purpose of amplifying this understanding, in this work it was investigated the nuclear structures (chromatin and nucleolar corpuscles) of salivary gland cells of Rhodnius neglectus (Lent, 1954) and Rhodnius prolixus (Stål,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gland; Morphology; Chromatin; Nucleolus; Nucleus.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000400002

Mg 2+ -dependent ATPase activity in triatomine salivary glands (Heteroptera, Triatominae)
Provedor de dados: Iheringia Série Zoologia
Autores: Anhê,Ana C. B. M.; Azeredo-Oliveira,Maria T. V.
ABSTRACT Mg2+-ATPase activity was detected in the three salivary glands of adult triatomines, males and females, of Triatoma infestans (Klug, 1834) and Panstrongylus megistus (Burmeister, 1835) (Heteroptera, Triatominae). A predominance of binucleated cells in D1 and D2 and mononucleated in D3 was observed, with bulky and polyploidy nuclei. ATPase activity was detected in the nuclei, possibly in euchromatin and nucleolus, where this enzyme probably acts in the transcription process. ATPase reaction was also evidenced in the nuclear membrane, which is probably associated with nuclear-cytoplasmatic transport. These characteristics indicate a high metabolism and protein synthesis, which must be essential to saliva production as well as in maintaining the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Euchromatin; Gland; Nuclear membrane; Nucleolus; Phosphatase.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212017000100231

The distribution of exocrine glands in Lepeophtheirus salmonis and Caligus elongatus (Copepoda: Caligidae)
Provedor de dados: Naturalis Digital Academic Repository
Autores: Bell, S.; Bron, J.E.; Sommerville, C.
The morphology, function and distribution of exocrine glands of copepods have rarely been studied in detail and almost nothing is known about them in the sea lice species L. salmonis and C. elongatus. This study utilised a novel application of a light-microscopy staining technique to reveal a variety of glands m nauplius, copepodid, chalimus, preadult and adult stages. The stain, 3’,3-diaminobenzidine tetrahydrochloride (DAB), applied to fresh material, differentiated a population of exocrine glands and enabled a study of their distribution. The stain was successful in highlighting the ducts and pores associated with the larger glands. The locations of gland sub-populations were conserved in all life-stages, although glands in the swimming legs were found...
Tipo: Article / Letter to the editor
Palavras-chave: Gland; Sea lice; Diaminobenzidine; Peroxidase; Caligidae; Copepoda.
Ano: 2000
URL: http://www.repository.naturalis.nl/record/534416

Tegumentar glands associated to foveae in the second metasomal tergum of Panurgillus Moure (Apoidea, Andrenidae, Panurginae)
Provedor de dados: Revista Brasileira de Entomologia
Autores: Ramos,Kelli dos Santos; Santos,Camila Gonçalves dos; Schlindwein,Clemens; Blochtein,Betina.
Panurginae have a pair of cuticular depressions in the second metasomal tergum, recognized as lateral foveae of the T2. These structures have been used as systematic and taxonomic characters, although their functions are yet unknown. We aimed a morphological analysis at lateral foveae of three species of Panurgillus Moure, 1998: P. vagabundus (Cockerell, 1918), P. reticulatus Schlindwein &amp;amp; Moure, 1998 e P. flavitarsis Schlindwein &amp;amp; Moure, 1998. The study of the external morphology showed that the lateral foveae of the T2 are evident among females, but in males they are undistinguishable or absent. The surface of the foveae is micropunctuated in all species. The histological analysis has shown that the region of the lateral foveae of the T2,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abdomen; Gland; Panurgillus; T2 lateral foveae; Tegumentar specialization.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262004000200002

Morphological study of the thorax of the five nymphal instars of Triatoma arthurneivai Lent &amp;amp; Martins (Hemiptera, Reduviidae, Triatominae)
Provedor de dados: Revista Brasileira de Entomologia
Autores: Rosa,João Aristeu da; Medeiros,Marcello Pereira; Cilense,Mario; Barata,José Maria Soares.
Scanning electron microscope (SEM) was done in order to study dorsal, ventral and lateral sides of 1st, 2nd, 3rd, 4th and 5th nymphal instars of Triatoma arthurneivai. The five nymphal instar can be recognized based on different pronotum, mesonotum and metanotum shapes and characteristics. In the 1st instar collar, hairless areas and tubercles are absent. The 2 nd instar presents collar, hairless areas and tubercles. In the 3rd instar occurs the development of wing pads. In the 4 th instar the four wing pads are expanded, but do not reach the abdomen and in the 5th instar the anterior wing pads almost overlap the posterior ones. At the ventral side, two metasternal glands openings (1+1) were found in all five nymphal instars. Brindley's gland evaporation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Distinction; Gland; Instar; Nymph; Triatoma arthurneivai.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262005000300001

Beyond pollination: diversity of secretory structures during flower development in different legume lineages
Provedor de dados: Acta Botanica Brasilica
Autores: Barros,Thais Cury De; Marinho,Cristina Ribeiro; Pedersoli,Giseli Donizete; Paulino,Juliana Vilella; Teixeira,Simone Pádua.
ABSTRACT Floral secretory structures are usually associated with the attraction of pollinators, but may also play an important role in the mechanisms of plant protection. This study aimed to show the diversity of secretory structures present in the developing flowers of 15 legume species belonging to different clades and to associate them with functions other than the pollinator attraction. Buds, flowers and developing axis of inflorescence were processed for surface, histological, and ultrastructural analyses. The species investigated displayed a wide diversity of secretory structures in developing flowers such as phenolic cells and/or tissues, mucilaginous cells, secretory cavities, secretory trichomes and colleters. Each type of secretory structure...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Colleter; Fabaceae; Gland; Idioblast; Leguminosae; Morphology; Mucilage cells; Secretory cavity; Secretory trichome.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300358

Trichomes that secrete substances of a mixed nature in the vegetative and reproductive organs of some species of Moraceae
Provedor de dados: Acta Botanica Brasilica
Autores: Schnetzler,Bruna Noce; Teixeira,Simone Pádua; Marinho,and Cristina Ribeiro.
ABSTRACT This study aimed to obtain new information about the distribution, morphology and content of secretory trichomes present in the vegetative and reproductive organs of four species of Moraceae: Artocarpus heterophyllus, Dorstenia cayapia, Maclura tinctoria and Sorocea bonplandii. Stem, leaf, flower and inflorescence samples were processed for scanning electron and light microscopy. The species have secretory trichomes on the leaf blade, petiole and stem and also on the inflorescence and flowers of D. cayapia and S. bonplandii and on the peduncle of the inflorescence in A. heterophyllus. These trichomes are of the capitate type in all species, but A. heterophyllus also possess peltate secretory trichomes. Both trichome types exhibit a multicellular...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Artocarpus; Dorstenia; Flower; Gland; Leaf; Maclura; Morphology; Sorocea.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300392

Secretory spaces in species of the clade Dipterygeae (Leguminosae, Papilionoideae)
Provedor de dados: Acta Botanica Brasilica
Autores: Palermo,Fernanda Helena; Teixeira,Simone de Pádua; Mansano,Vidal de Freitas; Leite,Viviane Gonçalves; Rodrigues,Tatiane Maria.
ABSTRACT Dipteryx, Pterodon and Taralea are legume genera known for secreting oils, produced in secretory canals and cavities, with medicinal properties. We analyzed the distribution, morphology and histochemistry of these glands in leaves and stems of Dipteryx alata, Pterodon pubescens and Taralea oppositifolia, three Neotropical species, using standard techniques for anatomy and histochemistry. Secretory spaces, i.e. secretory cavities and canals, exhibited a wide lumen and a single layer of epithelium. Digitiform epithelial cells, forming trabeculae protruding into the lumen, were seen in all three species. Secretory cavities with a rounded or oval lumen and secretory canals with an elongated lumen in longitudinal sections were found only in T....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anatomy; Fabaceae; Gland; Secretory canals; Secretory cavities.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000300374

Combination of fixative agents and fixation times to visually differentiate the cortical from the medullary layer in bovine adrenal glands
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: OLIVEIRA,FABRÍCIO S.; MACITELLI,FERNANDA; SANTOS,CAIO C.C.; BRAGA,JANAINA S.; COSTA,BARBARA C.; PASTORE,MARINA; ROCHA,THIAGO A.S.S.; COSTA,MATEUS J.R.P. DA.
Abstract Chronic stress exposure commonly increases adrenals weight and changes their morphology. This study aimed to compare four methods to delimitate the cortical and medullary layers of adrenals glands in Nelore bulls. Fresh adrenals did not present differentiation between layers. Then, frozen adrenals were distributed in plastics bags with fixative Bouin (G1), 96ºGL ethylic alcohol (G2), 10% formaldehyde (G3), or 2.5% glutaraldehyde (G4). After 12 hours of fixation, the G1 adrenal glands did not show the entire cortical layer marked by Bouin’s solution. For G2 and G3 there was a poor contrast, while for G4 there was a reasonable contrast. After 24 hours of fixation, G1 had an excellent contrast between layers, while G2 and G4 had a reasonable contrast...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Animal welfare; Morphometry; Stress; Anatomy; Gland.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703887