title: Apollo-Soyuz Test Project on biorhythm of zone-forming fungi: results of experiments.
abstract: Biorhythmic changes in spore (correction of sport) formation in the Pushchino strain of Actinomyces levoris Kras cultures on board Soyuz and Apollo during their joint flight in July 1975 are analysed and compared with control cultures on earth. Biorhythm changes during the flight period showed up as both a slowing down (most cultures) and, in a few cases, an acceleration of the rhythm. During the post-flight period both acceleration and slowing down of the rhythm were also observed. In cultures that were exchanged during the docking of the spaceships a slowing down of the rhythm on Apollo and acceleration of the rhythm on Soyuz were observed. A pronounced ring deformation, in response to landing, was observed only in the cultures on Soyuz. It was, however, different for the cultures that had been passed from Apollo and for those constantly on Soyuz. In five places, on four rings formed during the flight, local changes in spore formation occurred. The rhythmical disturbances observed are discussed in terms of possible effects of different temperatures, the absence of usual geophysical periodicities synchronizing the rhythmicity, or their shifting after landing, local radiation and other factors.
authors.affiliation: Institute of Biological Physics, USSR Academy of Sciences, Moscow, USSR.
authors.forename: I G
authors.initials: IG
authors.lastname: Akoev
authors.forename: A P
authors.initials: AP
authors.lastname: Savel'ev
authors.forename: A K
authors.initials: AK
authors.lastname: Akmadieva
mesh_terms: D000190:Actinomyces / Q000254:growth & development* / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology*; D007391:International Cooperation; D010507:Periodicity; D013026:Space Flight; D013172:Spores, Fungal / Q000254:growth & development; D014586:USSR; D014481:United States; D014893:Weightlessness