Topographic Distribution of the Different Cell Types, Connective Tissue and Vascular Tissue/Lumina Within a Functional Bovine Corpus Luteum and its Association with Breed, Type of Fixation Protocol and Stage During the Cycle

2013 ◽  
Vol 48 (4) ◽  
pp. 627-635 ◽  
Author(s):  
S Cools ◽  
W Van den Broeck ◽  
S De Vliegher ◽  
S Piepers ◽  
M Hostens ◽  
...  
Keyword(s):  
Connective Tissue ◽  
Corpus Luteum ◽  
Vascular Tissue ◽  
Cell Types ◽  
Breed Type ◽  
Bovine Corpus Luteum ◽  
Fixation Protocol ◽  
Different Cell Types ◽  
Topographic Distribution

On the Pituitary of the Perch (Peroa Fluviatilis)

1942 ◽  
Vol s2-83 (331) ◽  
pp. 299-316
Author(s):  
T. KERR
Keyword(s):  
Connective Tissue ◽  
Blood Vessels ◽  
Perca Fluviatilis ◽  
Cell Types ◽  
Anterior Lobe ◽  
Intermediate Lobe ◽  
General Description ◽  
Perch Perca Fluviatilis ◽  
Higher Types ◽  
Different Cell Types

1. A general description is given of the pituitary of the perch (Perca fluviatilis L.), and histological details of its various parts. The subdivisions of the glandular component are confluent with each other but distinguished by their different cell types. The nervous lobe makes contact with all three of the subdivisions, but is separated from them by a layer of connective tissue, incomplete in particular areas. 2. The anterior glandular region (anterior lobe) has an anterior chromophil and a posterior chromophobe zone. The middle glandular region (transitional lobe) possesses brightly staining acidophils and basophils as well as chromophobes. The acidophils form a dorsal sheet, deeply indented by processes of the nervous lobe, the basophils lie ventrally and posteriorly, and chromophobes are common towards the extremities of the indentations. The posterior glandular region (intermediate lobe) is elaborately penetrated by nervous lobe processes; the cells are small and consist of amphiphils, dull basophils, and occasional dull acidophils. The possible homologies of these regions to the lobes of higher types are discussed. The nervous lobe is of loose glial tissue with many nuclei and blood vessels and some reticular and collagenous fibres. 3. Strongly acidophil spheres of various sizes and in various numbers occur in the middle glandular region. They originate in ‘sphere cells’ resembling eosinophil leucocytes and after enlarging become free in the tissues of the region. Later they appear to pass into the posterior processes of the nervous lobe to be the larger bodies of the Herring material. Finally these larger elements appear to break down to form a fine granulation, whose further fate could not be followed.

scholarly journals TAMANHO DA AMOSTRA PARA ESTUDO DA PROPORÇÃO VOLUMÉTRICA DOS CONSTITUINTES DO CORPO LÚTEO BOVINO

2002 ◽  
Vol 7 (2) ◽  
Author(s):  
M. M. NEVES ◽  
A. P. MARQUES JR.
Keyword(s):  
Endothelial Cells ◽  
Soybean Oil ◽  
Corpus Luteum ◽  
Cell Types ◽  
Luteal Cell ◽  
Cell Nuclei ◽  
Cell Cytoplasm ◽  
Bovine Corpus Luteum

O objetivo deste estudo foi estabelecer o número de campos histológicos necessários para quantificar os componentes celulares do corpo lúteo bovino. Para os parâmetros citoplasma das células luteínicas, núcleo das células luteínicas e fibroblasto são necessários 30 campos, enquanto que para células endoteliais e pericito são necessários 35, podendo-se padronizar a técnica em 35 campos e 875 pontos por corpo lúteo. Soybean oil replaced by acidulated soapstock in broiler diets Abstract The purpose of this study was to determine the number of fields necessary for the quantification of the cell types of the bovine corpus luteum. A total of 30 fields is necessary for the quantification of the luteal cell cytoplasm, luteal cell nuclei and fibroblast, and 35 fields for the quantification of endothelial cells and pericycles. For the analysis of both parameters is recommended the study of 35 fields and 875 points per corpus luteum.

Lectin binding patterns in two cultured endothelial cell types derived from bovine corpus luteum

1996 ◽  
Vol 105 (2) ◽  
pp. 129-137 ◽  
Author(s):  
Gudrun Herrman ◽  
Hannah Missfelder ◽  
Katharina Spanel-Borowski
Keyword(s):  
Endothelial Cell ◽  
Corpus Luteum ◽  
Lectin Binding ◽  
Cell Types ◽  
Bovine Corpus Luteum

The Vascular System of the Wheat Spikelet

1985 ◽  
Vol 12 (5) ◽  
pp. 487 ◽  
Author(s):  
T.P O'Brien ◽  
M.E Sammut ◽  
J.W Lee ◽  
M.G Smart
Keyword(s):  
Cross Section ◽  
Vascular Tissue ◽  
Vascular System ◽  
Histological Study ◽  
Cell Types ◽  
Dimensional Model ◽  
3 Dimensional ◽  
Attachment Region ◽  
Important Pathway ◽  
Different Cell Types

The attachment region of a mid-spike spikelet was sectioned serially. These sections were used to construct an accurate 3-dimensional model of the course of the vascular system that supplies the organs of the a and b florets, and the rachilla of the c and d florets. All organs are interconnected by vascular tissue, but certain parts of the system are phloem-only. In particular, the supply to the groove bundle of the pericarp, widely held to be the most important pathway to the grain, is made via an annulus of phloem to which lemma, palea and lodicules have phloem-only connections. The vascular system is sufficiently different from the pattern encountered in vegetative nodes to warrant treatment sui generis. The relationships between different cell types need greater histological study, especially in the complex composite bundles. This analysis shows that bundle shape in cross-section and the arrangement of xylem and phloem vary sharply over very short distances (100 ~ m ) .T he distribution of xylem and phloem transfer cells agrees with the proposal that significant solute relocation takes place in the regions where the vascular supplies to different organs meet. The area in the ovary neck that encompasses the fusion zone of the supplies to lemma, palea and pericarp emerges as a zone in need of detailed study, both in spikelet positions within a cultivar of known, but different, grain performance, and as a region to analyse for inter-cultivar comparisons.

Genetic control of identity and growth in the early Arabidopsis embryo

2014 ◽  
Vol 42 (2) ◽  
pp. 346-351 ◽  
Author(s):  
Dolf Weijers
Keyword(s):  
Stem Cells ◽  
Plant Development ◽  
Vascular Tissue ◽  
Cell Types ◽  
Model System ◽  
Tissue Formation ◽  
Subsequent Growth ◽  
Future Challenges ◽  
Different Cell Types ◽  
Embryonic Root

Plants can grow complex and elaborate structures, in some species for thousands of years. Despite the diversity in form and shape, plants are built from a limited number of fundamental tissue types, and their arrangement is deeply conserved in the plant kingdom. A key question in biology is how these fundamental tissues, i.e. epidermal, ground and vascular tissue, are specified and organized in time and space. In the present paper, I discuss the use of the early Arabidopsis embryo as a model system to dissect the control of tissue formation and patterning, as well as the specification of the stem cells that sustain post-embryonic growth. I present recent insights into the molecules and mechanisms that control both the specification and the subsequent growth of the different cell types within the embryonic root. Finally, I discuss major unanswered questions and future challenges in using the embryo as a model to decipher the regulatory logic of plant development.

scholarly journals Specific and dynamic lignification at the cell-type level controls plant physiology and adaptability

2021 ◽  
Author(s):  
Delphine Ménard ◽  
Leonard Blaschek ◽  
Konstantin Kriechbaum ◽  
Cheng Choo Lee ◽  
Chuantao Zhu ◽  
...  
Keyword(s):  
Hydraulic Properties ◽  
Vascular Tissue ◽  
Biological Significance ◽  
Cell Types ◽  
Environmental Constraints ◽  
Cell Type ◽  
Pluripotent Cell ◽  
Whole Plants ◽  
Different Cell Types ◽  
Conduction Properties

Lignins, abundant phenolic cell wall polymers that accumulate in vascular tissue, were essential for plant terrestrialization as they enable sap conduction and mechanical support. Although lignification is currently understood as a random process, different cell types accumulate lignins with different compositions. The biological significance of these cellular differences is however still unknown. We performed single cell analyses to decipher the specific roles of different lignins and their residues on sap conduction and mechanical strengthening in plant xylem, using inducible pluripotent cell cultures and genetically modified whole plants. We show that specific lignins dynamically accumulate in each cell type and their morphotypes using distinct genetic programs, and that different lignin residues have non-redundant roles on plant biomechanical and hydraulic properties. Lignin is therefore a dynamic polymer changing composition to tailor the load bearing and sap conduction properties of each cells, in order for plants to adapt to developmental and environmental constraints.

Study of the Molecular Architecture of Keratin Filaments by Electron Microscopy

1982 ◽  
Vol 40 ◽  
pp. 118-119
Author(s):  
U. Aebi ◽  
P. Rew ◽  
T.-T. Sun
Keyword(s):  
Electron Microscopy ◽  
Structural Organization ◽  
Cell Types ◽  
Structural Features ◽  
Molecular Architecture ◽  
The Past ◽  
Keratin Filaments ◽  
Different Types ◽  
10 Nm Filaments ◽  
Different Cell Types

Various types of intermediate-sized (10-nm) filaments have been found and described in many different cell types during the past few years. Despite the differences in the chemical composition among the different types of filaments, they all yield common structural features: they are usually up to several microns long and have a diameter of 7 to 10 nm; there is evidence that they are made of several 2 to 3.5 nm wide protofilaments which are helically wound around each other; the secondary structure of the polypeptides constituting the filaments is rich in ∞-helix. However a detailed description of their structural organization is lacking to date.

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