ISSN:
1432-072X
Keywords:
Key words Sulfur starvation
;
Cyanobacterium
;
Sulfate
;
Sheath
;
Gloeothece
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Gloeothece sp. PCC 6909 is a unicellular, nitrogen-fixing cyanobacterium that accumulates sulfate in its sheath. An ultrastructural study of sulfate-deficient and normal Gloeothece sp. PCC 6909 cells was carried out. The physiological alterations, caused by sulfur starvation, were related to important morphological alterations in the cell: a structureless sheath, accumulation of cyanophycin, polyhydroxybutyrate and glycogen granules, and disintegration of thylakoidal membranes. Most of these changes were reversed by the addition of sulfate to the culture medium. The important role of sulfate in the sheath structure was demonstrated.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00272134
Permalink