Thermophilic CyanobacteriaMickey 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.