Thermophilic Cyanobacteria

Mickey Springs Sample #5



Mickey Springs sample #5 was growing in the spray zone on the edges of a bubbleing hot spring, exposed to steam and bubble spray. The mat formed a dark green to almost orange bole of aggregated filaments from at least three taxa.  The aggregated filaments show a remarkable co-branching pattern.

 
 
 

Imaged at 7x
 


Branch point imaged at 500x oil, bright field, showing large and small filaments following branch.  The small filament is possibly Phormidium laminosum.
 

Aggregated filaments near ruptured end.  The branches seems to be formed primarily of the smaller filaments, probably bound by a common mucilaginous sheath, though this was not apparent the the preparation used for these images.  Imaged at 1000x oil, phase-2.
 
 

Filaments near torn section of aggregate showing two prominent sizes.  Imaged at 400x phase-2.
 

Three distinct filaments found in strands, imaged at 1000x oil, phase-2.  The filament of globular cells is rare within the matrix, nowhere found with more than 30 cells present in a single filament.  The other two filaments are equally abundant, though the smaller filament (.5-1 mm diameter) appears to dominate, with the larger filament (3-4 mm diameter) forming the center of the strands as a loose bundle.  The background illustration is a 20x image of individual branches with smaller branching aggregates of filaments.
 
 

Some of the larger filaments show opaque inclusions (left).  The filaments have a definite, but thin, sheath.  At right, cell with inclusion within sheath.  No branching was detected in either the large or small filament.  Both images captured at 1000x oil, phase-2.
 
 

Cells at end of filament seen with distal vacant sheath. Imaged at 1000x oil, phase-2.
 
 

Filament and free floating bacteria, including rods and a spiral at bottom center.

Branches at low magnification (15x).
 
 

















This site was last updated on 13 September  2001.
Copyright © 2001 Steven L. Jessup, Southern Oregon University

Background image is MickSpr5, growth form photographed at 20x.