Photoinhibition and reactivation of photosynthesis in the cyanobacterium Anacystis nidulans

Journal Article · Sun Dec 01 04:00:00 EST 1985 · Plant Physiol.; (United States)

DOI:https://doi.org/10.1104/pp.79.4.992· OSTI ID:6831309

Samuelsson, G; Loenneborg, A; Rosenqvist, E; Gustafsson, P; Oequist, G

The susceptibility of photosynthesis to photoinhibition and its recovery were studied on cultures of the cyanobacterium Anacystis nidulans. Oxygen evolution and low temperature fluorescence kinetics were measured. Upon exposure to high light A. nidulans showed a rapid decrease in oxygen evolution followed by a quasi steady state rate of photosynthesis. This quasi steady state rate decreased with increasing photon flux density of the photoinhibitory light. Reactivation of photosynthesis in dim light after the photoinhibitory treatment was rapid: 85 to 95% recovery occurred within 2 hours. In the presence of the translation inhibitor, streptomycin (250 micrograms per milliliter), no reactivation occurred. We also found that the damage increased dramatically if the high light treatment was done with streptomycin added. A transcription inhibitor, rifampicin, did not inhibit the reactivation process. Based on these data we conclude that the photoinhibitory damage observed is the net result of a balance between the photoinhibitory process and the operation of the repairing mechanism(s).

• Research Organization: Univ. of Umea, Sweden
• OSTI ID: 6831309
• Journal Information: Plant Physiol.; (United States), Journal Name: Plant Physiol.; (United States) Vol. 79:4; ISSN PLPHA
• Country of Publication: United States
• Language: English

Related Subjects

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59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANTI-INFECTIVE AGENTS
ANTIBIOTICS
BIOLOGICAL RECOVERY
BIOLOGICAL REPAIR
BODY TEMPERATURE
CELL CULTURES
CHEMICAL REACTIONS
CYANOBACTERIA
DATA
DRUGS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
EXPERIMENTAL DATA
FLUORESCENCE
HYPOTHERMIA
INFORMATION
INHIBITION
LUMINESCENCE
MASSLESS PARTICLES
MICROORGANISMS
NONMETALS
NUMERICAL DATA
OXYGEN
PHOTOCHEMICAL REACTIONS
PHOTONS
PHOTOREACTIVATION
PHOTOSYNTHESIS
RADIATIONS
RECOVERY
REPAIR
STREPTOMYCIN
SYNTHESIS
VISIBLE RADIATION