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Pollen-pistil interaction in Mauritia flexuosa: structural and cytological aspects provide insight into the reproductive success of a dioecious palm with supra-annual flowering in a semiarid environment.
Plant Biol (Stuttg)
January 2025
Laboratório de Ecologia Vegetal, Departamento de Biologia Geral, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Brazil.
The success of pollen-pistil interaction in Mauritia flexuosa (buriti), a palm adapted to the humid ecosystems, 'veredas', within the Cerrado, is influenced by intrinsic and environmental factors. Its supra-annual flowering, dioecy, and adverse climate conditions pose challenges for fertilization, therefore information on floral biology is essential. This study aimed to ascertain stigma receptivity, and elucidate structural, cytochemical, and ultrastructural aspects of the pollen-pistil relationship.
View Article and Find Full Text PDF[The role of mitochondrial dysfunction in the stabilization of the glaucomatous process].
Vestn Oftalmol
September 2024
West Siberian Institute of Postgraduate Medical Education, Tyumen, Russia.
Unlabelled: Many key aspects of retinal ganglion cell (RGC) neurodegeneration in glaucoma are associated with mitochondrial dysfunction. Understanding the mechanisms and relationships between structural and functional changes in mitochondria would be beneficial for developing mitochondria-targeted therapeutic strategies to protect RGCs from glaucomatous neurodegeneration.
Purpose: This study determines the extent of mitochondrial dysfunction in patients with primary open-angle glaucoma (POAG) and evaluates the potential for stabilizing the glaucomatous process by improving mitochondrial functional activity and energy production by therapy with Mexidol and Mexidol FORTE 250.
Osteosarcoma of the wing in a sulfur-crested cockatoo.
Vet Clin Pathol
March 2024
Department of Population Health and Pathobiology, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA.
A 26-year-old female sulfur-crested cockatoo (Cacatua galerita) was evaluated for vocalizing through the night and extending her right wing. Physical examination revealed a large, firm mass extending from the humerus to the distal aspect of the elbow. Computed tomography confirmed a large aggressive mass of the right distal humerus with a large soft tissue component, severe osteolysis, and adjacent periosteal proliferation.
View Article and Find Full Text PDFMorphological, cytochemical and ultrastructural aspects of blood cells in freshwater stingray species in the middle Rio Negro basin of Amazonian Brazil.
Sci Rep
August 2021
Laboratório de Ciências Fisiológicas, Universidade Federal do Amazonas (UFAM), Avenida General Rodrigo Octávio Jordão Ramos, 3000. Coroado I, Manaus, AM, 69077-000, Brazil.
In the present work, we examined the morphology, dimensions, cytochemical staining reactions and ultrastructure of blood cells from three freshwater stingray species, Potamotrygon wallacei, Potamotrygon motoro and Paratrygon aiereba, living in the waters of the middle Rio Negro basin (Barcelos, Amazonas, Brazil). We identified erythrocytes, erythroblasts, thrombocytes and four types of leukocytes (basophils, heterophils, lymphocytes and monocytes) in the blood of these stingray species. In all the freshwater stingray species studied, the shapes and dimensions of these cells were similar to those of marine elasmobranchs.
View Article and Find Full Text PDFProlactin promotes a partial recovery from the atrophy of both male and female gerbil prostates caused by castration.
Reprod Biol Endocrinol
June 2021
Department of Structural and Functional Biology, Institute of Biology, State University of Campinas - UNICAMP, SP, Campinas, Brazil.
Background: The male and female prostates are controlled by steroid hormones, suffering important morphological and physiological changes after castration. Prolactin is involved in the regulation of the male prostate, having already been identified in the tissue, acting through its receptor PRLR. In the Mongolian gerbil, in addition to the male prostate, the female prostate is also well developed and active in its secretion processes.
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