TY - JOUR
T1 - About-weekly changes in electrical potential, chloroplast migration and oxygen production in Acetabularia grown under continuous exposure to light
AU - Katinas, G.
AU - Hillman, D.
AU - Siegelová, J.
AU - Dušek, J.
AU - Svačinová, H.
AU - Cornelissen-Guillaume, Germaine G
AU - Halberg, F.
PY - 2002
Y1 - 2002
N2 - The presence of an about-weekly (circaseptan) component was examined in the giant unicellular alga Acetabularia and compared with its circadian rhythms. The analysis was based on the archival data collected by the late Hans-Georg Schweiger of Germany. Changes in electrical potentials, chloroplast migration and oxygen production were investigated and related to whether, during cultivation, this algae was exposed to continuous light (LL) or to an alternation of light and darkness at 12-hour intervals (LD 12:12). In LD 12:12 conditions, the circadian rhythm was a prominent spectral component while, in LL conditions, the circaseptan component increased. The results provide further evidence for the ubiquity of circaseptan rhytms and suggest that this component, appearing early in the course of evolution, has become anchored in the genetic makeup of living organisms.
AB - The presence of an about-weekly (circaseptan) component was examined in the giant unicellular alga Acetabularia and compared with its circadian rhythms. The analysis was based on the archival data collected by the late Hans-Georg Schweiger of Germany. Changes in electrical potentials, chloroplast migration and oxygen production were investigated and related to whether, during cultivation, this algae was exposed to continuous light (LL) or to an alternation of light and darkness at 12-hour intervals (LD 12:12). In LD 12:12 conditions, the circadian rhythm was a prominent spectral component while, in LL conditions, the circaseptan component increased. The results provide further evidence for the ubiquity of circaseptan rhytms and suggest that this component, appearing early in the course of evolution, has become anchored in the genetic makeup of living organisms.
KW - Acetabularia
KW - Chloroplast migration
KW - Circaseptan rhythm
KW - Electrical potential
KW - Oxygen production
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M3 - Review article
AN - SCOPUS:0036909675
SN - 1211-3395
VL - 75
SP - 309
EP - 314
JO - Scripta Medica Facultatis Medicae Universitatis Brunensis Masarykianae
JF - Scripta Medica Facultatis Medicae Universitatis Brunensis Masarykianae
IS - 6
ER -