The cells at the end of the filaments are heterocysts. Some long rod shaped bacteria have colonized most heterocysts suggesting that there is some kind of mutualistic relationship. Phase contrast microscopy. Image by David J Patterson Image copyright: D. J. Patterson, image used under license to MBL (micro*scope).
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From the collection
Microbes of Convict Lake
|Description of Cylindrospermum: Filamentous, with terminal heterocysts and with adjacent akinetes. |