Hormogonium
Sign in to savethumb|Nostoc with hormogonia Hormogonia are motile filaments of cells formed by some cyanobacteria in the order Nostocales and Stigonematales. They are formed during vegetative reproduction in unicellular, filamentous cyanobacteria, and some may contain heterocysts and akinetes.
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thumb|Nostoc with hormogonia Hormogonia are motile filaments of cells formed by some cyanobacteria in the order Nostocales and Stigonematales. They are formed during vegetative reproduction in unicellular, filamentous cyanobacteria, and some may contain heterocysts and akinetes.
Cyanobacteria differentiate into hormogonia when exposed to an environmental stress or when placed in new media.
Excerpted from Wikipedia’s “Hormogonium” article, available under the CC BY-SA 4.0 licence.