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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 PDFLipidic folding pathway of α-Synuclein via a toxic oligomer.
Nat Commun
January 2025
NMR Based Structural Biology, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany.
Aggregation intermediates play a pivotal role in the assembly of amyloid fibrils, which are central to the pathogenesis of neurodegenerative diseases. The structures of filamentous intermediates and mature fibrils are now efficiently determined by single-particle cryo-electron microscopy. By contrast, smaller pre-fibrillar α-Synuclein (αS) oligomers, crucial for initiating amyloidogenesis, remain largely uncharacterized.
View Article and Find Full Text PDFThymol inhibits ergosterol biosynthesis in Nakaseomyces glabratus, but differently from azole antifungals.
J Mycol Med
December 2024
Invasive Fungi Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran; Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran. Electronic address:
Introduction: Nakaseomyces glabratus is considered a high priority of attention according to WHO, and also is an important yeast species due to its high rate of intrinsic/acquired resistance against fluconazole. This study aimed at the possible mechanisms of action of thymol, as the promising new antifungal agent, in N. glabratus.
View Article and Find Full Text PDFMorphometrics and First Ultrastructural Characterizations of Intra-Erythrocytic Stages of So-Called Haemogregarina damiettae Ramadan et al. (1996) With Special Reference to Its Cytopathological Effects on the Infected Erythrocytes.
Microsc Res Tech
January 2025
Department of Zoology and Entomology, Faculty of Science, Helwan University, Helwan, Egypt.
The current study provides the first ultrastructural observations on the intraerythrocytic stages of so-called Haemogregarina damiettae and their cytopathological effects on the infected erythrocytes (IEs) in addition to the recording of new morphometric data. The intraerythrocytic stages are attributed to the immature forms or trophozoites (Ts), and mature gamonts (Gs). Ts are typically bowling-bottle shaped with nucleus (TN) occupying its globose part, while Gs are typically banana- shaped.
View Article and Find Full Text PDFInsights into morphology of the 'columnar epithelium' within the female reproductive system of brachyuran crabs.
Arthropod Struct Dev
January 2025
Zoological Museum, University of Kiel, Hegewischstrasse 3, 24105, Kiel, Germany.
The objective of this study is to gain a better understanding of the not well understood egg-transportation mechanisms through the female reproductive systems of crabs. For this, Carcinus maenas was chosen as a model to study the cuticular epithelium underlying the cuticle of the vagina and the ventral seminal receptacle. This cuticular epithelium is investigated by performing histochemical and ultrastructural analyses of the epithelial cells.
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