ULTRASTRUCTURE OF THE SECRETORY INCLUSIONS OF THE SALIVARY GLAND CELL IN <i>DROSOPHILA </i>

Rizki, T. M.

doi:10.1083/jcb.32.2.531

Cited by 30 publications

(5 citation statements)

References 3 publications

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“…The ultrastructural appearance of the class 1 cells that form the salivary glands in Drosophila larvae ( Rizki, 1967;Lane and Carter, 1972;von Gaudecker, 1972;Farkaš and Šutakova, 1998) is highly similar to that of the described simuliid larvae. In addition, fi elds of glycogen occur in the cytoplasm of the Drosophila gland cells.…”

Section: Glands Employed In Defencesupporting

confidence: 61%

Adhesive Exocrine Glands in Insects: Morphology, Ultrastructure, and Adhesive Secretion

Betz

2010

Biological Adhesive Systems

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A literature survey is provided summarizing the available information on exocrine epidermal glands that produce adhesive secretions in insects. The focus is on both the ultrastructure of the gland cells and the identity and function of the chemical secretion produced by them. Insects employ adhesives for various functions such as tarsal attachment during locomotion, resisting external detachment forces, mating, phoresy and parasitism, egg anchorage, retreat building, self-grooming, prey capture, and active and passive defence. The available studies on the ultrastructure and the secretion of adhesive insect glands cover a broad spectrum of developmental stages and higher taxa, i.e.

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Section: Glands Employed In Defencesupporting

confidence: 61%

Adhesive Exocrine Glands in Insects: Morphology, Ultrastructure, and Adhesive Secretion

Betz

2010

Biological Adhesive Systems

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“…In D. virilis, the salivary gland secretory granules are homogeneous, having a paracrystalline structure (Kress 1974), and two main secretory proteins have been detected (Kress 1982). In D. melanogaster, the salivary gland secretion contains five (Korge 1977b), six (Beckendorf and Kafatos 1976), or eight (Crowley et al 1983) secretory proteins; under the electron microsope, the secretory granules consist of three different elements (Rizki 1967;Vidal et al 1970;von Gaudecker 1972;Thomopoulos and Kastritis 1979). We suspect that the number of secretory proteins is related to the structure of the secretory granules: the larger the number of secretory proteins, the more complex the structure.…”

Section: Discussionmentioning

confidence: 93%

“…our laboratory, and cytological (Scouras and Kastritsis 1984; Although the larval salivary glands of Drosophila have been used extensively in genetical, cytological, evolutionary, and developmental studies, research on their cellular ultrastructure has been limited (Rizki 1967;Vidal et al 1970;Harrod andKastritsis 1972a, 1972b;Lane et al 1972;von Gaudecker 1972;Thomopoulos andKastritsis 1979, 1983;Thomopoulos 1987aThomopoulos , 1987b. The synthesis of salivary gland products has been correlated with changes in the puffing pattern in several dipteran species (Grossbach 1974;Kress 1973;Korge 1975Korge , 1977aKorge , 1977bKorge , 1981Akam et al 1978;Velissariou and Ashburner 1980;Winter et al 1977Winter et al , 1980Serfling et al 1983).…”

Section: Introductionmentioning

confidence: 99%

An ultrastructural and histochemical developmental study of Drosophila auraria salivary gland cells during the third-instar period

Thomopoulos¹,

Neophytou²,

Kastritsis³

1989

Can. J. Zool.

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Early in the third-instar stage of Drosophila auraria, the salivary gland cells produce small secretory granules of low electron density which empty their flocculent contents into the lumen of the gland. At that stage, the Golgi complexes consist of vesiculated, round cisternae which, as middle third instar is approached, change to their classical appearance. Cytoplasmic protrusions, intramitochondrial granules, and close contacts of mitochondria with lipid droplets are observed during the early developmental stages. At about the middle of the third instar the glue secretory granules start being produced. These secretory granules contain a granular material (where small amounts of vicinal glycol and sulfated groups of complex carbohydrates have been detected) of medium electron density. The glue secretory granules can be classified according to their electron density into two populations. Before exocytosis large amounts of glycogen particles are observed, providing some of the energy needed during the final step of exocytosis. Two different types of ribonucleoprotein particles in puffing sites of the chromosomes are observed. Of these, the larger ones consist of a core surrounded by smaller particles; we suspect that they may be produced in the Balbiani rings observed in the polytene chromosomes of this species. Nuclear blebs and oval bodies are common, particularly during the late developmental stages. The functional significance of these findings during development is discussed.

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“…Here, we studied the roles of Crb in the regulation of constitutive saliva secretion in SGs at the beginning of the 3 rd instar, while larvae are still feeding. At this stage there is a minimal synthesis of glue proteins (Kodani, 1948; Rizki, 1967; Beckendorf and Kafatos, 1976; Korge, 1977; Zhimulev et al, 1981), while salivary glycoproteins are actively secreted into the lumen (Thomopoulos, 1988; Chung et al, 2014; Maruyama and Andrew, 2012; Csizmadia et al, 2018; Gregg et al, 1990; Fraenkel and Brookes, 1953).…”

Section: Discussionmentioning

confidence: 99%

Crumbs organizes the transport machinery by regulating apical levels of PI(4,5)P2 in Drosophila

Lattner

Leng

Knust

et al. 2019

eLife

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An efficient vectorial intracellular transport machinery depends on a well-established apico-basal polarity and is a prerequisite for the function of secretory epithelia. Despite extensive knowledge on individual trafficking pathways, little is known about the mechanisms coordinating their temporal and spatial regulation. Here, we report that the polarity protein Crumbs is essential for apical plasma membrane phospholipid-homeostasis and efficient apical secretion. Through recruiting βHeavy-Spectrin and MyosinV to the apical membrane, Crumbs maintains the Rab6-, Rab11- and Rab30-dependent trafficking and regulates the lipid phosphatases Pten and Ocrl. Crumbs knock-down results in increased apical levels of PI(4,5)P2 and formation of a novel, Moesin- and PI(4,5)P2-enriched apical membrane sac containing microvilli-like structures. Our results identify Crumbs as an essential hub required to maintain the organization of the apical membrane and the physiological activity of the larval salivary gland.

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ULTRASTRUCTURE OF THE SECRETORY INCLUSIONS OF THE SALIVARY GLAND CELL IN DROSOPHILA

Cited by 30 publications

References 3 publications

Adhesive Exocrine Glands in Insects: Morphology, Ultrastructure, and Adhesive Secretion

Adhesive Exocrine Glands in Insects: Morphology, Ultrastructure, and Adhesive Secretion

An ultrastructural and histochemical developmental study of Drosophila auraria salivary gland cells during the third-instar period

Crumbs organizes the transport machinery by regulating apical levels of PI(4,5)P2 in Drosophila

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