GERD GUENTHER / SCIENCE PHOTO LIBRARY GERD GUENTHER / SCIENCE PHOTO LIBRARY
Light microscope footage of Euglena viridis algae, showing the metabolic movement of the elongate cells. In this preparation the remaining water film is rather thin to show the cell surface structure. All Euglena cells threw off their flagella and perform amoeboid, metabolic movements. Euglenoids are among the most ancient lineages of eukaryotic algae. Euglenoids display a surface structure composed of parallel ribbon-like strips, running lengthwise down the cells. The algae contain Paramylon grains (a starch-like carbohydrate) as well as a characteristic red eyespot. Euglena viridis is photosynthetic, using the energy of sunlight to synthesize food. The eyespot is sensitive to light, allowing it to move towards sunlight. Microscopic contrast method used : differential interference contrast. Captured field width : 0,23mm.
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