ISSN:
1432-072X
Schlagwort(e):
Cyanobacteria
;
Oscillatoria
;
Anoxygenic photosynthesis
;
Sulfide intolerance
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Biologie
Notizen:
Abstract A spontaneous variant incapable of anoxygenic photosynthesis was derived from a fully competent strain of Oscillatoria amphigramulata which was originally isolated from a high sulfide-containing hot spring of New Zealand. Although the variant (Oa-2) acquired a slight ability to photosynthesize in the presence of 0.3–0.4 mM sulfide, this was only after a 24 h exposure to sulfide and represented oxygenic photosynthesis only. Unlike the parent strain, the incompetent variant never grew in the presence of sulfide 〉0.05 mM, nor was there any relief of the inhibition by DCMU [3-(3,4-dichlorophenyl)-1,1-dimethylurea] of CO2 photoincorporation when sulfide was present. The variant strain has retained all of these characteristics over a 4 year period with monthyl transfers in non-sulfide medium. The wild type, under identical conditions, has retained all of its competence with respect to sulfide.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF00410895
