Structural and histochemical attributes of secretory ducts and cavities in leaves of four species of Calophyllaceae J. Agardh in Amazonian savannas

Plant Biology ◽  
2021 ◽  
Author(s):  
M. J. G. Pessoa ◽  
S. Pireda ◽  
P. Simioni ◽  
N. Bautz ◽  
M. Da Cunha
Keyword(s):  
Secretory Ducts

scholarly journals INFOLDED BASAL PLASMA MEMBRANES FOUND IN EPITHELIA NOTED FOR THEIR WATER TRANSPORT

1956 ◽  
Vol 2 (4) ◽  
pp. 203-208 ◽  
Author(s):  
Daniel C. Pease
Keyword(s):  
Choroid Plexus ◽  
Water Transport ◽  
Ciliary Body ◽  
Plasma Membranes ◽  
Cell Layer ◽  
Submaxillary Gland ◽  
Basal Surface ◽  
Basal Plasma ◽  
Marked Tendency ◽  
Secretory Ducts

Epithelia noted for their water transport have been studied by electron microscopy with particular emphasis upon basal specializations. Epithelia of the submaxillary gland, choroid plexus, and ciliary body are described in this article, and compared with previous observations on the kidney. The basal surface of all these epithelia is tremendously expanded by folds which penetrate deeply into the cytoplasm. In the submaxillary gland this is particularly notable in cells of the serous alveoli and in the secretory ducts. In these instances the folds have a fairly regular distribution and have a marked tendency to turn back upon themselves and so form repeating S-shaped patterns. In the choroid plexus the penetrating basal folds are limited to the lateral regions of each ependymal cell where they blend with the intercellular membranes that are also folded. In the epithelium of the ciliary body it is the inner layer that is specialized. The surface adjacent to the cavity of the eye penetrates irregularly, nearly through the full depth of the cell layer. The exposed surface is, in a fundamental sense, the basal surface of this epithelial layer. It is apparent that the pattern of folding is quite distinctive in the different epithelia. Therefore, the specializations should be regarded as analogous rather than homologous. Topographic considerations presumably limit the manner in which basal cell surfaces might be expanded. Penetrating folds would seem to represent almost the only possible solution.

scholarly journals Fruit ontogeny of Garcinia gardneriana (Planch. & Triana) Zappi (Clusiaceae)

2011 ◽  
Vol 25 (1) ◽  
pp. 43-52 ◽  
Author(s):  
Marta Eglaé Camargo Asinelli ◽  
Maria Conceição de Souza ◽  
Káthia Socorro Mathias Mourão
Keyword(s):  
Food Source ◽  
White Pulp ◽  
Important Food ◽  
Fruit Type ◽  
Standard Procedures ◽  
Cell Layers ◽  
Important Food Source ◽  
Structural Aspects ◽  
Yellowish Orange ◽  
Secretory Ducts

Garcinia gardneriana (Clusiaceae) is a small to medium-sized tree that usually occurs on the floodplains of the Paraná River and it is an important food source for the local inhabitants. The fruit itself is consumed in natura, and juices and sweets are made from it. The purpose of this study was to describe morphological and structural aspects of fruits and seeds of this species in order to classify the fruit type and the pulpy layer which involves the seeds. The material analyzed consisted of ovary and fruits in different stages of development, collected from five plants from Aurélio Island, Baía River (MS, BR) and the description was done according to standard procedures in anatomy. The fruit is a yellowish-orange spherical berry ("bacóide" type). The smooth, coriaceous skin consists of the lignified exocarp. The endocarp cell layers are derived from the activity of an adaxial meristem that undergoes radial elongation. The edible sweet white pulp is formed by the endocarp, as well as the spongy mesocarp, in which the secretory ducts lose their function. The unitegmic anatropous ovules develop into anatropous exalbuminous seeds with a collapsed and undifferentiated testa. The embryo is hypocotylar. The features here described generally occur in Clusioideae-Garcinieae and Symphonieae.

scholarly journals Dichoropetalum schottii: examination of the type specimen, distribution and comparison with D. carvifolium-chabraei (Apiaceae)

2015 ◽  
Vol 2 (2) ◽  
pp. 131
Author(s):  
Eugene V. Kljuykov ◽  
Tatiana A. Ostroumova ◽  
Fabio Conti ◽  
Patricia M. Tilney
Keyword(s):  
Related Species ◽  
Natural Populations ◽  
Type Specimen ◽  
Botanical Garden ◽  
Secretory Ducts

The lectotype and isolectotype specimens of <em>Peucedanum schottii</em>, based on plants originally cultivated in Cremenets Botanical Garden, have been studied in detail. The geographic provenance of the plants is unknown but they are identical to natural populations in Albania, Bosnia &amp; Herzegovina, Croatia, France, Greece, Italy, Montenegro and Serbia. The valid name for this plant is therefore <em>Dichoropetalum schottii.</em> It differs from a related species, <em>D.</em> <em>carvifolium-chabraei,</em> in having glabrous umbel rays, white (not yellow) petals, long styles and solitary secretory ducts in fruit valleculae.

ULTRASTRUCTURE OF THE SECRETORY DUCTS OF RHUS GLABRA L.

1974 ◽  
Vol 61 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Abraham Fahn ◽  
Ray F. Evert
Keyword(s):  
Secretory Ducts

Notes on the genus Hyalolaena (Apiaceae) with description of a new species H. zhang-minglii from Xinjiang, western China

Phytotaxa ◽  
2019 ◽  
Vol 388 (3) ◽  
pp. 229
Author(s):  
DMITRY LYSKOV ◽  
EUGENE KLJUYKOV ◽  
ULIANA UKRAINSKAJA ◽  
KOMILJON TOJIBAEV
Keyword(s):  
New Species ◽  
Western China ◽  
Short Root ◽  
A New Species ◽  
Secretory Ducts ◽  
Tian Shan

Hyalolaena zhang-minglii (Apiaceae) is described and illustrated as a new species from the Eastern Tian Shan, Narat Range, China. The species is related to H. issykkulensis but differs by filiform terminal segments of basal leaves, equal narrow-winged fruit ribs, short root, and greater number of secretory ducts on commissural side of mericarp. Hyalolaena depauperata is synonymized under H. jaxartica. Two species of Hyalolaena, namely H. bupleuroides and H. intermedia, are newly recorded for Uzbekistan.

Salivary glands as endocrine organs

1960 ◽  
Vol 15 (1) ◽  
pp. 101-105 ◽  
Author(s):  
Z. Z. Godlowski ◽  
J. C. Calandra
Keyword(s):  
Gastrointestinal Tract ◽  
Insulin Sensitivity ◽  
Glucose Tolerance ◽  
Technical Assistance ◽  
Glucose Tolerance Test ◽  
Tolerance Test ◽  
Submaxillary Glands ◽  
Endocrine Organs ◽  
Insulin Inhibitor ◽  
Secretory Ducts

Total bilateral extirpation of submaxillary and sublingual glands produced in five dogs a significant increase of insulin sensitivity as measured by insulin sensitivity test. The glucose tolerance test in the same animals showed a less significant and less constant increase of the utilization of the administered glucose. Similar results were obtained in four dogs with a complete bilateral ligation of the secretory ducts, which resulted in the atrophy of the submaxillary and sublingual glands. Fourteen control experiments failed to show any significant fluctuations in insulin sensitivity or in utilization of the administered glucose. It is concluded that submaxillary and, possibly, sublingual glands are producing a factor which, if removed, potentiates the action of insulin; this factor is designated as submaxillary insulin inhibitor (S.I.I.). Submaxillary glands in dogs possess argentaffine cells in a large amount, and they are identified as the demilune formations; these cells have histochemical characteristics similar to the argentaffine cells found in the gastrointestinal tract. Note: (With the Technical Assistance of E. J. Kaminski) Submitted on January 29, 1959

Contribution of Light and Electron Microscopy to Identification of Bark from Frangula azorica, an Azorean Medicinal Plant

2015 ◽  
Vol 21 (5) ◽  
pp. 1296-1303
Author(s):  
Maryam Malmir ◽  
Cátia Curica ◽  
Elsa T. Gomes ◽  
Rita Serrano ◽  
Olga Silva
Keyword(s):  
Electron Microscopy ◽  
Herbal Medicine ◽  
Medicinal Plant ◽  
Light And Electron Microscopy ◽  
Herbal Medicines ◽  
Iucn Red List ◽  
The Family ◽  
Chemical Studies ◽  
Macaronesian Flora ◽  
Secretory Ducts

AbstractFrangula azorica V. Grubow is a Macaronesian flora medicinal plant, endemic from Azores islands and inscribed on the International Union for the Conservation of Nature (IUCN) Red List of Threatened Species. This species, known as “sanguinho,” belongs to the family Rhamnaceae, the same as Frangula alnus Mill. and Frangula purshiana (DC.) J. G. Cooper, two widely used official laxative herbal medicines of the western Pharmacopoeias constituted by the dried barks of each species. Morphological and chemical studies on F. azorica dried bark are scarce although it is potentially recognized as a Portuguese laxative herbal medicine. Macroscopically, the bark occurs in quills or nearly flat pieces. A channeled external surface with transversely elongated lenticels is characteristic. When the outer phellem layer is removed, a bright purple inner phellem layer is disclosed. Light and electron microscopy observations revealed flattened phellem cells with slightly thickened walls, cortical parenchyma with secretory ducts and groups of sclereids, phloem with groups of fibers and sheaths of parenchymatous cells containing druses or more frequently prismatic crystals of calcium oxalate, and parenchymatous medullary rays one to three cells wide with spherical starch grains. Observation of these botanical characteristics must be included in quality monographs of F. azorica bark herbal medicine.

scholarly journals The Mechanism of Secretion by the Salivary Gland of the Cockroach Periplaneta Americana (L.)

1951 ◽  
Vol 4 (2) ◽  
pp. 136 ◽  
Author(s):  
MF Day
Keyword(s):  
Salivary Gland ◽  
Periplaneta Americana ◽  
Cell Types ◽  
Main Cell ◽  
Secretory Ducts

The two main cell types of the cockroach salivary gland, the ductule-containing cells and the zymogenic cells, are together responsible for the secretion of a powerful amylase and a mucoid substance. The evidence presented suggests that the precursors of both these materials are elaborated in the zymogenic cells and are passed to the ductule-containing cells for excretion. The morphology of the secretory ducts suggests that they also play a part in the elaboration of the saliva.

DISTRIBUTION AND DEVELOPMENT OF SECRETORY DUCTS IN TRICHOSCYPHA (ANACARDIACEAE)

1986 ◽  
Vol 35 (4) ◽  
pp. 425-435 ◽  
Author(s):  
R. W. den Outer ◽  
W. L. H. van Veenendaal
Keyword(s):  
Secretory Ducts

scholarly journals Structure of Panax quinquefolius L. (Araliaceae) Roots with Emphasis on Secretory Duct Formation

1998 ◽  
Vol 123 (5) ◽  
pp. 798-801 ◽  
Author(s):  
R. Larry Peterson ◽  
Gregory T. Varney ◽  
Shannon Binns
Keyword(s):  
Lateral Roots ◽  
Primary Root ◽  
Secondary Growth ◽  
Panax Quinquefolius ◽  
Secondary Phloem ◽  
Primary Xylem ◽  
Casparian Bands ◽  
Transmission Electron ◽  
Anatomical Localization ◽  
Secretory Ducts

Primary and first-order lateral roots of Panax quinquefolius L. (American ginseng) were collected from plants in an experimental garden during their second year of growth and processed for light and transmission electron microscopy. Roots in primary growth had either a diarch or triarch primary xylem pattern, a pericycle, an endodermis with Casparian bands and subsequently a suberized cell wall, and a cortex of variable thickness with a suberized hypodermal layer. Both root types underwent rapid secondary growth and the primary root particularly formed a fleshy storage organ. The secondary phloem and secondary xylem had abundant parenchyma and few conducting elements. Secretory ducts differentiated in tissue derived from the pericycle and in the secondary phloem. Each schizogenous duct consisted of six to eight epithelial cells, which possessed dense, globular deposits but lacked starch. A phellogen, which produced several layers of suberized phellem, was initiated in the periphery of tissue derived from the pericycle. The results of this study clarify the anatomical localization of secretory duets in roots of this species.

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