Nostoc colony detail, LM

Nostoc colony detail, LM

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Credit: GERD GUENTHER/SCIENCE PHOTO LIBRARY

Caption: Nostoc cyanobacteria, detail of a spherical colony. Nostoc sp. filaments inside a gelatinous colony. Nostoc algae have the ability to fix atmospheric nitrogen in specialized cells, the heterocytes (seen in the middle right of the image), thereby playing a major role in soil fertility. Nostoc is frequently abundant in flooded rice paddies, where it contributes to the fertilization of some 2 million hectares. They have a wide distribution and are commonly found in soil and on mud, rocks and plants. Microscopic contrast technique : brightfield. Magnification: 380x when printed 10 centimetres wide.

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Keywords: algal, aquatic, biological, biology, blue background, blue-green algae, botanical, botany, brightfield, colonial, colony, cyanobacteria, cyanobacterium, fauna, filamentous, filaments, flora, freshwater, light blue background, light micrograph, micro-organism, microorganism, nature, nostoc sp., photosynthesis, photosynthetic, single celled, single-celled, unicellular

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