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Ultrastructure of Olkasia polycarbonata (Euglenozoa, Euglenida) demonstrates cytoskeletal innovations associated with the feeding and flagellar apparatuses.
J Eukaryot Microbiol
January 2025
Department of Botany, University of British Columbia, Vancouver, British Columbia, Canada.
Euglenids are flagellates with diverse modes of nutrition, including the photosynthetic Euglenophyceae, which acquired plastids via secondary endosymbiosis with green algae, and a diverse assemblage of predators of bacteria and other microeukaryotes. Most heterotrophic euglenids have never been cultivated, so their morphology remains poorly characterized and limited to only a few studies. "Ploeotids" are a paraphyletic group representing much of the diversity of heterotrophic euglenids and are characterized by their feeding apparatus and a rigid pellicle of 10-12 longitudinally arranged strips.
View Article and Find Full Text PDFDynamic in vivo monitoring of granum structural changes of Ctenanthe setosa (Roscoe) Eichler during drought stress and subsequent recovery.
Physiol Plant
January 2025
Department of Plant Anatomy, Institute of Biology, Faculty of Science, ELTE Eötvös Loránd University, Budapest, Hungary.
Investigating the effects of drought stress and subsequent recovery on the structure and function of chloroplasts is essential to understanding how plants adapt to environmental stressors. We investigated Ctenanthe setosa (Roscoe) Eichler, an ornamental plant that can tolerate prolonged drought periods (40 and 49 days of water withdrawal). Conventional biochemical, biophysical, physiological and (ultra)structural methods combined for the first time in a higher plant with in vivo small-angle neutron scattering (SANS) were used to characterize the alterations induced by drought stress and subsequent recovery.
View Article and Find Full Text PDFNitrogen availability modulates carotene biosynthesis, chromoplast biogenesis, and cell wall composition in carrot callus.
Plant Cell Rep
January 2025
Department of Plant Biology and Biotechnology, Faculty of Biotechnology and Horticulture, University of Agriculture in Krakow, al. Mickiewicza 21, 31-120, Krakow, Poland.
Carrot callus grown on a medium with increased nitrogen have reduced carotenoid accumulation, changed gene expression, high amount of vesicular plastids and altered cell wall composition. Carotenoid biosynthesis is vital for plant development and quality, yet its regulation under varying nutrient conditions remains unclear. To explore the effects of nitrogen (N) availability, we used carrot (Daucus carota L.
View Article and Find Full Text PDFProtective effect of Ocimum basilicum L. essential oil on Lactuca sativa L. treated with cadmium.
Plant Physiol Biochem
December 2024
Department of Life Science, Health, and Health Professions", Link Campus University, 00165 Rome, Italy. Electronic address:
In recent years, essential oils (EO) are a sustainable and effective alternative to conventional chemical treatments in response to heavy metals in plants. These natural molecules can increase the resilience of plants under stress conditions. In the present work, the ability of EOs from the aerial parts of Ocimum basilicum L.
View Article and Find Full Text PDFMyosotis scorpioides L. (Boraginaceae) floral nectary: Micromorphology, fluorescence, and ultrastructure.
Micron
December 2024
Department of Botany and Plant Physiology, University of Life Sciences in Lublin, Akademicka 15, Lublin 20-950, Poland. Electronic address:
The small flowers of Myosotis scorpioides are pollinated by various groups of insects feeding on their nectar accumulating at the base of the corolla tube. To date, only few studies have focused on the anatomy and ultrastructure of nectaries in plants from the family Boraginaceae. The aim of this study was to analyse the structure of the M.
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