NEW TYPES OF CHROMOSOMAL REARRANGEMENTS OCCURRING IN MICROSPORES OF TRADESCANTIA PALUDOSA UNDER THE INFLUENCE OF A NUMBER OF FACTORS IN OPERATION DURING THE FLIGHT OF A SPACE SHIP (in Russian)
Special spherical fragments were found in material fixed during an orbital flight. The spherical fragments appear to be micronuclei, but they cannot be micronuclei, since they occurred in the course of a single mitosis. The ratio of the number of spherical fragments to the total number of chromosomal and chromatid fragments during metaphase was 1.77 on Vostok-3, and 1.81 on Vostok- 4. This ratio was 2.0 and 1.74, respectively during telophase. A new type of chromosomal arrangement involved the formation of complex bridges with the appearance of a single spherical fragment. The ratio of complex exchanges to dicentrics, and to chromosomal and chromatid exchanges during metaphase was 0.34 on Vostok-3, and 0.35 on Vostok-4. An acceleration of 5000 g causes the formation of spherical fragments during interphase and prophase, or of particular chromosomal and chromatid fragments that are almost spherical in nature (during metaphase, anaphase, and telophase). Because of the similarity observed in the chromosomal rearrangements, it was concluded that acceleration is the cause of the occurrence of the new type of chromosomal rearrangement. (TTT)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-005042
- OSTI ID:
- 4136213
- Journal Information:
- Doklady Akademii Nauk SSSR (U.S.S.R.) English translation currently published in a number of subject-oriented journals, Journal Name: Doklady Akademii Nauk SSSR (U.S.S.R.) English translation currently published in a number of subject-oriented journals Vol. Vol: 152; ISSN DANKA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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