GERD GUENTHER / SCIENCE PHOTO LIBRARY GERD GUENTHER / SCIENCE PHOTO LIBRARY
Light micrograph of a thin section through the lobe of Lobaria laetevirens lichen, showing the photobiotic algae genus Nostoc in red auto fluorescence. The symbiotic cyanobakteria are located in a aggregation in the middle of the interwoven hyphens of the lobe. Microscopic contrast method: Fluorescence contrast, UV excitation. Magnification 580x when printed at 10 centimetres width.
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