Herein we describe a new photosynthetic euglenoid species found in Poland - Euglena mazurica. A large population exists in a small, eutrophic body of water located in a pasture near Mikołajki town inside the Masurian Landscape Park (covering a part of the Masurian Lake District in Poland). The unique cell shape (corkscrew-like) discerns it well from other previously described euglenoid species with metabolic cells. The new species possesses two plate-like chloroplasts each with a pyrenoid accompanied by two paramylon caps placed on either side of it (diplopyrenoids). On the phylogenetic tree, the new species is situated within the Euglena clade. Though it is a sister branch to three clades - one representing the similar Euglena agilis, characterized by its fusiform cells and two chloroplasts with diplopyrenoids, the two species are clearly morphologically and molecularly distinct.
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http://dx.doi.org/10.1016/j.protis.2024.126015 | DOI Listing |
Protist
April 2024
University of Warsaw, Faculty of Biology, Biological and Chemical Research Centre, ul. Żwirki i Wigury 101, 02-089 Warsaw, Poland.
Herein we describe a new photosynthetic euglenoid species found in Poland - Euglena mazurica. A large population exists in a small, eutrophic body of water located in a pasture near Mikołajki town inside the Masurian Landscape Park (covering a part of the Masurian Lake District in Poland). The unique cell shape (corkscrew-like) discerns it well from other previously described euglenoid species with metabolic cells.
View Article and Find Full Text PDFJ Eukaryot Microbiol
May 2021
Department of Physics, Shaoxing University, Shaoxing, Zhejiang Province, 312000, China.
Euglenoids present the ability to alter the shape of their bodies, a process referred to as metaboly. Metaboly is usually used by phagotrophic cells to engulf their prey. However, Euglena gracilis is osmotrophic and photosynthetic.
View Article and Find Full Text PDFFront Plant Sci
March 2018
Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka, Japan.
Euglenoids are unique protists that can grow photoautotrophically, photomixotrophically, and heterotrophically. Here we grew under these different growth conditions and determined cellular contents of seven membrane lipids and one storage lipid (triacylglycerol), which account for more than 94 mol% of total membrane lipids. We also describe the relationship among chloroplast and mitochondria developments with lipid contents, protein contents, and oxygen evolution/consumption rates.
View Article and Find Full Text PDFJ Phycol
June 2017
Department of Plant Biology, Michigan State University, 612 Wilson Rd, Room# 166 Plant Biology Labs, East Lansing, Michigan, 48824, USA.
Gene duplication is an important evolutionary process that allows duplicate functions to diverge, or, in some cases, allows for new functional gains. However, in contrast to the nuclear genome, gene duplications within the chloroplast are extremely rare. Here, we present the chloroplast genome of the photosynthetic protist Euglena archaeoplastidiata.
View Article and Find Full Text PDFEur J Protistol
February 2017
Tvärminne Zoological Station, University of Helsinki, J.A. Palménin tie 260, 10900 Hanko, Finland; Department of Environmental Sciences, University of Helsinki, P.O. Box 65, 00014 Helsinki, Finland; Marine Research Centre, Finnish Environment Institute, P.O. Box 140, 00251 Helsinki, Finland.
To determine community composition and physiological status of early spring sea-ice organisms, we collected sea-ice, slush and under-ice water samples from the Baltic Sea. We combined light microscopy, HPLC pigment analysis and pyrosequencing, and related the biomass and physiological status of sea-ice algae with the protistan community composition in a new way in the area. In terms of biomass, centric diatoms including a distinct Melosira arctica bloom in the upper intermediate section of the fast ice, dinoflagellates, euglenoids and the cyanobacterium Aphanizomenon sp.
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