scholarly journals Anatomy and ultrastructure of osmophores of Cymbidium tracyanum Rolfe (Orchidaceae)

2014 ◽  
Vol 62 (1-2) ◽  
pp. 5-9 ◽  
Author(s):  
Małgorzata Stpiczyńska
Keyword(s):  
Glandular Cells ◽  
Anatomy And Ultrastructure ◽  
Endoplasmic Reticula

The intense smell secreted by flowers of <i>Cymbidium tracyanum</i> Rolfe (<i>Orchidaceae</i>) derives from osmophores situated on the axipetal surface, mainly at the petals' base and the margin of labellum. The epiderm in those places created vesicular or somewhat elongated glandular cells, particularly on the labellum. In the production of smell 2-3 layers of subepidermal cells also take part. Submicroscopic examinations showed that those cells were characterized by the presence of a big nucleus. There were also numerous granules of starch and plastoglobules in plastids, a great amount of mitochondria and smooth-surfaced endoplasmic reticula. The traces of secretion products are visible on the surface of glandular cells. The above mentioned features are typical for osmophore cells.

Anatomy and ultrastructure of haustoria in selected West Australian parasitic angiosperms

1990 ◽  
Vol 48 (3) ◽  
pp. 690-691
Author(s):  
John Kuo ◽  
John S. Pate
Keyword(s):  
Parasitic Plants ◽  
The Other ◽  
Nutrient Transfer ◽  
Direct Solution ◽  
Tracheary Elements ◽  
Solute Transfer ◽  
Glycol Methacrylate ◽  
Australian Species ◽  
Anatomy And Ultrastructure ◽  
Solution Transfer

Our understanding of nutrient transfer between host and flowering parasitic plants is usually based mainly on physiological concepts, with little information on haustorial structure related to function. The aim of this paper is to study the haustorial interface and possible pathways of water and solute transfer between a number of host and parasites.Haustorial tissues were fixed in glutaraldehyde and embedded in glycol methacrylate (LM), or fixed in glutaraldehyde then OsO4 and embedded in Spurr’s resin (TEM).Our study shows that lumen to lumen continuity occurs between tracheary elements of a host and four S.W. Australian species of aerial mistletoes (Fig. 1), and some root hemiparasites (Exocarpos spp. and Anthobolus foveolatus) (Fig. 2). On the other hand, haustorial interfaces of the root hemiparasites Olax phyllanthi and Santalum (2 species) are comprised mainly of parenchyma, as opposed to terminating tracheads or vessels, implying that direct solution transfer between partners via vessels or tracheary elements may be limited (Fig. 3).

Occurrence and Development of a Dorsal Gland in the Leaves of Twelve Cultivars of Ficus benjamina L. (Weeping Fig)

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 537b-537
Author(s):  
Svoboda V. Pennisi ◽  
Dennis B. McConnell ◽  
Richard W. Henley
Keyword(s):  
Leaf Size ◽  
Dark Spot ◽  
Ficus Benjamina ◽  
Axis Parallel ◽  
Glandular Cells ◽  
Phenolic Substances ◽  
Dark Color ◽  
Columnar Cells ◽  
Dorsal Gland ◽  
Colorimetric Reaction

Ficus benjamina plants are an integral part of most modern interior landscapes. Reports from growers and interiorscape managers have drawn attention to a specific problem related to large F. benjamina plants, namely the occurrence of a dark oval spot on the abaxial surface of the leaf base. Twelve cultivars of F. benjamina were examined: Christine, Citation, Florida Spire, Kelly, Kiki, Midnight, Monique, Stacey, Wintergreen, Dwarf Nikita, Spearmint, and Starlight. Anatomically, the dorsal gland consisted of one to several layers of densely stained, columnar cells. Positive colorimetric reaction for phenolics was obtained in the glandular cells. Developmentally, the gland cells could not be distinguished from the regular epidermal cells until ≈30% of final leaf size was reached. The cells of the outermost glandular layer changed shape from rectangular with long axis parallel to the leaf surface to elongate with long axis perpendicular to the surface. In a mature leaf, the thickness of the glandular layer was between 20 and 30 μm. Externally, at this stage, no dark spot, indicative of the gland's location, could be observed. In older leaves, however, an accumulation of phenolic substances led to appearance of dorsal dark spot. All cultivars possessed glandular layer. However, this area did not darken in all cultivars; Christine, Citation, Florida Spire, Kelly, Kiki, and Stacey developed small dark spots, while Dwarf Nikita and Starlight had numerous, well-pronounced glandular regions. This study showed that the dark spots in F. benjamina cultivars were a normal morphological feature. Although the gland was present in every cultivar, only a few cultivars developed a dark color.

Incidence of Atypical Glandular Cells of Uncertain Significance in Cervical Cytology Following Introduction of the Bethesda System

1997 ◽  
Vol 67 (1) ◽  
pp. 51-55 ◽  
Author(s):  
Gary L. Eddy ◽  
Serdar H. Ural ◽  
Kenneth B. Strumpf ◽  
Martha A. Wojtowycz ◽  
Pamela S. Piraino ◽  
...  
Keyword(s):  
Cervical Cytology ◽  
Uncertain Significance ◽  
Glandular Cells ◽  
Atypical Glandular Cells ◽  
Bethesda System ◽  
The Bethesda System

Ultrastructure of scent glands in larvae of Apateticus bracteatus (Hemiptera: Pentatomidae) and chemical composition of the secretion

1980 ◽  
Vol 58 (11) ◽  
pp. 2105-2115 ◽  
Author(s):  
Jean Percy ◽  
J. A. MacDonald ◽  
J. Weatherston
Keyword(s):  
Chemical Composition ◽  
Interstitial Cells ◽  
Secretory Cells ◽  
Scent Glands ◽  
Volatile Constituents ◽  
Dorsal Wall ◽  
Anterior Dorsal ◽  
Glandular Cells ◽  
Gland Function ◽  
Dorsal Abdominal Glands

The three dorsal abdominal glands in larvae of Apateticus bracteatus (Pentatomidae) secrete a mixture of compounds. Major volatile constituents of the secretion are identified, herein, as tridecane and 2-octenal. There are also trace amounts of 2-hexenal and two other unidentified compounds.Each of the glands has paired orifices that are located between tergites 3/4, 4/5, and 5/6, but only the most anterior gland is paired. In anterior glands of midinstar larvae, glandular cells associated with ducts, and interstitial glandular cells are distributed along the ventral walls of the reservoirs. In posterior glands, columnar glandular cells are located in the anterior dorsal wall of the reservoirs; secretory cells associated with ducts, and nonglandular interstitial cells are distributed throughout the ventral and posterior walls of the reservoirs. The interstitial glandular cells of the anterior gland and the columnar glandular cells of the middle and posterior glands contain cytoplasmic organelles characteristic of lipid-producing cells. In all glands the secretory cells associated with ducts secrete lipids. Evidence indicating the importance of Golgi and ER in secretion synthesis is presented. The reservoirs and ducts have a thin cuticular lining.The bearing of the results on present ideas of gland function in Heteroptera is discussed.

Glandular Cells in Vaginal Smears from Posthysterectomy Patients

1997 ◽  
Vol 41 (6) ◽  
pp. 1701-1704 ◽  
Author(s):  
Brent Ponder ◽  
Kevin O. Easley ◽  
Rosa M. Dávila
Keyword(s):  
Vaginal Smears ◽  
Glandular Cells

Anatomy and ultrastructure of the axons and terminals of neurons R3-R14 inAplysia

1979 ◽  
Vol 188 (4) ◽  
pp. 647-677 ◽  
Author(s):  
Christopher H. Price ◽  
David J. McAdoo
Keyword(s):  
Anatomy And Ultrastructure

scholarly journals INDUCTION OF ENDOMETRIAL PEROXIDASE SYNTHESIS AND SECRETION BY ESTROGEN AND ESTROGEN ANTAGONIST

1974 ◽  
Vol 62 (2) ◽  
pp. 449-459 ◽  
Author(s):  
Andrew Churg ◽  
Winston A. Anderson
Keyword(s):  
Endoplasmic Reticulum ◽  
Golgi Apparatus ◽  
Peroxidase Activity ◽  
Secretory Granules ◽  
Combined Treatment ◽  
Initial Injection ◽  
Immature Rats ◽  
Glandular Cells ◽  
Endogenous Peroxidase ◽  
Estrogen Antagonist

Synthesis of peroxidase was induced in the uterine epithelium of immature rats by multiple doses over a 24–96-h period of either 17 ß-estradiol, the estrogen-antagonist Parke-Davis CI-628, or a combination of estradiol plus antagonist. Endogenous peroxidase activity first appeared in the cisternae of the rough endoplasmic reticulum of surface epithelial and glandular cells within 24–48 after the initial injection. Uterine peroxidase activity was also visible in the cisternae of the Golgi apparatus, in Golgi-derived secretory granules, and within the uterine and glandular lumen. Some cells of the epithelium produced little or no peroxidase, even after 96 h. Whereas the antagonist appeared to induce synthesis and secretion of peroxidase, neither the antagonist alone nor the combined treatment (estradiol plus antagonist) reproduced the estradiol-mediated growth in organ size and increased lumen diameter.

Sign in / Sign up

Export Citation Format

Share Document