title: Apollo-Soyuz Test Project on biorhythm of zone-forming fungi: preliminary work.
abstract: The purpose of the experiment was to study general and local effects of space flight factors on the rhythm of cellular activity and on the morphological and genetic properties of biological objects. The Pushchino strain, Actinomyces levoris Kras 17-225A-IBFM, isolated at the Institute of Biological Physics, Moscow, was chosen as the main biological object. Under appropriate conditions it gives distinct and continuous rings of spore formation reflecting its intrinsic high degree of synchronism in changing its reproduction forms seen with the unaided eye as transparent rings (vegetative growth) alternate with convex white rings (spore-formation growth). As an additional test object, a film culture of bacteriophage T4Br+ developed at the institute was used. The strains were placed together in one bioblock together with plastic detectors for detecting nuclear particles. The film culture of bacteriophage enabled us to amplify the area of registration of local radiation effects by studying the genetic effects of these: frequency of mutations, induced radiation, their spectrum, subsequent revertability under the action of chemical mutagens with known mechanisms of action on DNA molecules.
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 K
authors.initials: AK
authors.lastname: Akhmadieva
authors.forename: A P
authors.initials: AP
authors.lastname: Savel'ev
authors.forename: A L
authors.initials: AL
authors.lastname: Mashinsky
authors.forename: N I
authors.initials: NI
authors.lastname: Konshin
authors.forename: S S
authors.initials: SS
authors.lastname: Yurov
authors.forename: A A
authors.initials: AA
authors.lastname: Leonov
authors.forename: V N
authors.initials: VN
authors.lastname: Kubasov
authors.forename: A V
authors.initials: AV
authors.lastname: Filipchenko
authors.forename: N N
authors.initials: NN
authors.lastname: Rukavishnikov
authors.forename: A B
authors.initials: AB
authors.lastname: Rubin
authors.forename: T G
authors.initials: TG
authors.lastname: Zharikova
authors.forename: A K
authors.initials: AK
authors.lastname: Zarubina
mesh_terms: D000190:Actinomyces / Q000254:growth & development* / Q000502:physiology / Q000528:radiation effects; D017122:Bacteriophage T4 / Q000528:radiation effects; D002940:Circadian Rhythm / Q000502:physiology*; D003359:Cosmic Radiation; D009154:Mutation; D010507:Periodicity; D011874:Radiometry; D013026:Space Flight; D013172:Spores, Fungal / Q000254:growth & development / Q000502:physiology / Q000528:radiation effects; D014893:Weightlessness