GERD GUENTHER / SCIENCE PHOTO LIBRARY GERD GUENTHER / SCIENCE PHOTO LIBRARY
Light micrograph of Nostoc pruniforme colonies showing several round cyanobacteria cells in spherical mucilage aggregations. The cells show red auto fluorescence under blue excitation. Culture material of the Culture Collection of Algae at the University of Cologne. Microscopic contrast method: Fluorescence contrast, blue excitation. Magnification 360x when printed at 10 centimetres wide.
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