Aphanizomenon is a cyanobacterium that often occurs in large aggregates. This was isolated on 4th April in a 20 micron plankton net haul at Sällvik (sample 4). These DIC images show the vacuolate character of the cell contents. This image was taken by D. J. Patterson and M. Majaneva Copyright, micro*scope.
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From the collection
Gems from Tvärminne
|Description of Aphanizomenon: Aphanizomenon is a filamentous blue-green alga (cyanobacterium). The filaments may be free-floating, solitary or in some species bound together as colonies up to an inch in length. The filaments (trichomes) are usually straight or slightly curved, rounded or narrowing at the tips, with crosswalls, no firm sheaths but sometimes a surrounding mucilagenous layer; cells may be vacuolized; sometimes with heterocysts, Gas vacuoles may be present. May cause blooms, the type species (A. flos-aquae) may cause problems in water supply reservoirs and aquaculture. |