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Los Cotos, Madrid, Spain
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Villoslada de Cameros, La Rioja, Spain
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Los Cotos, Madrid, Spain
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Villoslada de Cameros, La Rioja, Spain
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Lumbreras, La Rioja, Espaa
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Lumbreras, La Rioja, Espaa
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Micrasterias(mike-raz-tear-ee-ass) is a genus of unicellular algae in the family Desmidiaceae. The cells are flattened and disc-like. The cells of the genus Micrasterias are organized in two semi-cells that are mirror images of each other. The semicells have a distinctive shape with an intricate lobes and indentation. At the end of the lobes the cell wall may sometimes form notches or short spines. The nucleus is located in the centrfe between the semicells. Each semicell has a chloroplast with some pyrenoids. Usually found in oligotrophic, acid waters. This is a specimen of Micrasterias truncata collected in a moor pond located in the vicinity of Konstanz, Germany. Differential interference contrast.
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Villoslada de Cameros, La Rioja, Espaa
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Micrasterias(mike-raz-tear-ee-ass) is a genus of unicellular algae in the family Desmidiaceae. The cells are flattened and disc-like. The cells of the genus Micrasterias are organized in two semi-cells that are mirror images of each other. The semicells have a distinctive shape with an intricate lobes and indentation. At the end of the lobes the cell wall may sometimes form notches or short spines. The nucleus is located in the centrfe between the semicells. Each semicell has a chloroplast with some pyrenoids. Usually found in oligotrophic, acid waters. This is a specimen of Micrasterias truncata collected in a moor pond located in the vicinity of Konstanz, Germany. Dark ground illumination.
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Amer, La Rioja, Spain
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Non-filamentous desmids have the ability to move slowly by means of directed mucilage secretion. Depht of focus approach can show cell surface together with folded chloroplasts, cell contour and nucleus. In zip archive there are more DOF pictures of this object. Picture generated from 9 shots using CombineZ by Alan Hadley, MicroPicS by Bernhard Wiedemann and Photoshop. Sample from spagnum pond Dosenmoor near Neumuenster (Schleswig-Holstein, Germany). Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Villoslada de Cameros, La Rioja, Spain
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In photosynthesis the enzyme RuBisCO (Ribulose-1,5-Biphosphat- Carboxylase/Oxygenase) plays a very important role. Many algae concentrate RuBisCO in special grains named pyrenoids. The depth of focus picture shows the structured chloroplasts wth their pyrenoids. Micrasterias truncata has a mucous envelope. The genus have two types of pores, small ones situated all over the cell surface for building their mucous envelope and special ones with bigger lumen to excrete mucilage for movement. A high resolution taking in zip archive showes the numerous small ones. Deph of focus technique was used to gather details from over 40 shots. See zip archive for more. Sample from spagnum pond situated in the northern alpine region of Austria near Salzburg. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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The median optical section shows the nucleus end the pyrenoid bodies. Scale bar indicates 50 µm. Sample from sphagnum pond situated in the northern alpine region of Austria near Salzburg. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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S Pedro, Galicia, Spain
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Lumbreras, La Rioja, Spain
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Two cells shortly after binary fission. The connecting sheath of the primary cell wall is visible. Scale bar indicates 25 µm. Sample from sphagnum pond situated in the northern alpine region of Austria near Salzburg. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.
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Lumbreras, La Rioja, Espaa
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