HISTOCHEMICAL STUDIES ON LOCALIZATION AND DISTRIBUTION OF ESTERASES IN THE SALIVARY GLANDS OF THE LARGE MILKWEED BUG, ONCOPELTUS FASCIATUS (DALL.) (HEMIPTERA: LYGAEIDAE)

1959 ◽  
Vol 37 (2) ◽  
pp. 113-115 ◽  
Author(s):  
E. H. Salkeld
Keyword(s):  
Epithelial Cells ◽  
Salivary Glands ◽  
Body Wall ◽  
Epidermal Cells ◽  
Oncopeltus Fasciatus ◽  
Nonspecific Esterase ◽  
Posterior Lobe ◽  
Milkweed Bug

The posterior lobe of the salivary glands of the large milkweed bug, Oncopeltus fasciatus (Dall.), was rich in a nonspecific esterase. An esterase was also localized in the epidermal cells of the tracheae and body wall and in the epithelial cells of the first part of the mid-gut. No true lipase was found in the salivary glands or in the head or thorax.

A HISTOCHEMICAL STUDY OF THE SECRETIONS IN THE PRINCIPAL SALIVARY GLANDS OF THE LARGE MILKWEED BUG, ONCOPELTUS FASCIATUS (DALLAS)

1960 ◽  
Vol 38 (3) ◽  
pp. 449-454 ◽  
Author(s):  
E. H. Salkeld
Keyword(s):  
Salivary Gland ◽  
Salivary Glands ◽  
Histochemical Study ◽  
Lateral Lobe ◽  
Anterior Lobe ◽  
Oncopeltus Fasciatus ◽  
Posterior Lobe ◽  
Milkweed Bug ◽  
Digestive Function ◽  
Histochemical Tests

Each lobe of the trilobed principal salivary gland of the adult large milkweed bug, Oncopeltus fasciatus (Dallas), contains a chemically different secreted product. Histochemical tests suggest that the secretion of the anterior lobe is composed of muco- or glyco-protein and neutral mucopolysaccharide. The secretion of the lateral lobe is mainly lipoproteinaceous, while that of the posterior lobe appears to be a mucoprotein. It is suggested that the secretion of the anterior lobe may form the stylet sheath; the secretions of the posterior and lateral lobes are more likely to have a digestive function.

ANATOMY, HISTOLOGY, AND SECRETIONS OF SALIVARY GLANDS OF THE LARGE MILKWEED BUG, ONCOPELTUS FASCIATUS (DALLAS) (HEMIPTERA: LYGAEIDAE)

1958 ◽  
Vol 36 (6) ◽  
pp. 961-968 ◽  
Author(s):  
Joan F. Bronskill ◽  
E. H. Salkeld ◽  
W. G. Friend
Keyword(s):  
Salivary Glands ◽  
Digestive Enzymes ◽  
Oncopeltus Fasciatus ◽  
Milkweed Bug ◽  
Accessory Glands

As in most Heteroptera, the salivary system of Oncopeltus fasciatus (Dallas) consists of a pair of trilobed principal glands and a pair of tubular accessory glands with associated ducts; the anatomy and histology are reported in detail. Tests for digestive enzymes demonstrated the presence of amylase, protease, invertase, and lipase. The various lobes of the salivary glands contain different digestive enzymes, a finding that is at variance with some published reports on allied Heteroptera.

Studies on the pteridines in the milkweed bug, Oncopeltus fasciatus (Dallas)

1966 ◽  
Vol 12 (11) ◽  
pp. 1411-1421 ◽  
Author(s):  
Hugh S. Forrest ◽  
Michael Menaker ◽  
Jennifer Alexander
Keyword(s):  
Oncopeltus Fasciatus ◽  
Milkweed Bug

Contact behaviour during the reassociation of dissociated epithelial cells in primary culture

1987 ◽  
Vol 88 (4) ◽  
pp. 521-526
Author(s):  
R.M. Brown ◽  
C.A. Middleton
Keyword(s):  
Epithelial Cells ◽  
Chick Embryo ◽  
Primary Culture ◽  
Cell Cultures ◽  
Corneal Epithelium ◽  
Time Lapse ◽  
Cell Types ◽  
Epidermal Cells ◽  
Isolated Cells ◽  
Contact Behaviour

The behaviour in culture of dissociated epithelial cells from chick embryo pigmented retina epithelium (PRE), corneal epithelium (CE) and epidermis has been studied using time-lapse cinematography. The analysis concentrated on the contact behaviour of 60 previously isolated cells of each type during a 24 h period starting 3.5 h after the cells were plated out. During the period analysed the number of isolated cells in cultures of all three types gradually decreased as they became incorporated into islands and sheets of cells. However, there were significant differences in behaviour between the cell types during the establishment of these sheets and islands. In PRE cell cultures, islands of cells developed because, throughout the period of analysis, collisions involving previously isolated cells almost invariably resulted in the development of a stable contact. Once having established contact with another cell these cells rarely broke away again to become reisolated. In contrast the contacts formed between colliding CE and epidermal cells were, at least initially, much less stable and cells of both these types were frequently seen to break away and become reisolated after colliding with other cells. Sheets and islands of cells eventually developed in these cultures because the frequency with which isolated cells become reisolated decreased with increasing time in culture. The possible reasons underlying the different behaviour of PRE cells, when compared with that of CE and epidermal cells, are discussed. It is suggested that the decreasing tendency of isolated CE and epidermal cells to become reisolated may be related to the formation of desmosomes.

scholarly journals Transovum Transmission of Trypanosomatid Cysts in the Milkweed Bug, Oncopeltus fasciatus

PLoS ONE ◽  
2014 ◽  
Vol 9 (9) ◽  
pp. e108746 ◽  
Author(s):  
Felipe de Almeida Dias ◽  
Luiz Ricardo da Costa Vasconcellos ◽  
Alexandre Romeiro ◽  
Marcia Attias ◽  
Thais Cristina Souto-Padrón ◽  
...  
Keyword(s):  
Oncopeltus Fasciatus ◽  
Milkweed Bug
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