The ultrastructure of Chlorella cells grown in darkness on a solid agar medium with organic additions aboard the Bion-10 biosatellite was studied. Certain differences in submicroscopic organization of organelles in the experimental cells were revealed compared to the Earth control. The changes are registered mainly in ultrastructure of energetic organelles--mitochondria and plastids of the experimental cells, in particular, an increase of mitochondria and their cristae size, as well as an increase of the total volume of mitochondrion per cell were established. The decrease of the starch amount in the plastid stroma and the electron density of the latter was also observed. In many experimental cells, the increase of condensed chromatin in the nuclei has been noted. Ultrastructural rearrangements in cells after laboratory experiment realized according to the thermogram registered aboard the Bion-10 were insignificant compared to the flight experiment. Data obtained are compared to results of space flight experiments carried out aboard the Bion-9 (polycomponent aquatic system) and the orbital station Mir (solid agar medium).
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/0273-1177(95)00619-p | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Studies on clonogenic hemopoietic cells of vertebrate in space: problems and perspectives.
Adv Space Res
May 2003
Institute of Developmental Biology, Russian Academy of Sciences, Moscow, Russia.
Hemopoietic tissues were studied in vertebrates launched aboard the Soviet (Russian) biosatellites ("Cosmos-1129, 1514, 1667, 1887 and 2044"; "Bion-10 and 11") between 1980 and 1996. In the bone marrow of rats exposed to spaceflight conditions, a statistically significant decrease in cell number was revealed in the progenitor cell compartment accounting for the compensatory response of granulocyte-macrophage (CFU-gm) and erythrocyte lineages (BFU-e and CFU-e) and in the compartment of multipotent hemopoietic stem cells (CFU-s), which is responsible for the permanent renewal of hemopoietic tissue. The number of stromal fibroblastic progenitors (CFC-f) in the bone marrow of these rats was also reduced.
View Article and Find Full Text PDFPeculiarities of ultrastructure of Chlorella cells growing aboard the Bion-10 during 12 days.
Adv Space Res
September 1996
Institute of Botany, National Academy Sciences of Ukraine, Kiev.
The ultrastructure of Chlorella cells grown in darkness on a solid agar medium with organic additions aboard the Bion-10 biosatellite was studied. Certain differences in submicroscopic organization of organelles in the experimental cells were revealed compared to the Earth control. The changes are registered mainly in ultrastructure of energetic organelles--mitochondria and plastids of the experimental cells, in particular, an increase of mitochondria and their cristae size, as well as an increase of the total volume of mitochondrion per cell were established.
View Article and Find Full Text PDFAmphibian tail regeneration in space: effect on the pigmentation of the blastema.
Adv Space Res
July 1996
Centre de Biologie du Développement, Université Paul Sabatier, Toulouse, France.
In Urodele amphibians, the tail regenerates after section. This regeneration, including tissues as different as bone (vertebrae), muscle, epidermis and central nervous system (spinal cord), was studied in adult Pleurodeles sent aboard the russian satellite Bion 10 and compared with tail regeneration in synchronous controls. Spinal cord, muscle and cartilage regeneration occurred in space animals as in synchronous controls.
View Article and Find Full Text PDFImpact of microgravity and hypergravity on free-running circadian rhythm of the desert beetle Trigonoscelis gigas Reitt.
Biol Rhythm Res
April 1994
Institute of Biomedical Problems, Moscow, Russia.
Free-running circadian rhythms of locomotor activity of Tenebrionid beetles Trigonoscelis gigas Reitt., taken from the Turkmenian sand desert, were monitored in DD. The effects of microgravity --11 days in space flight aboard the Russian BION-10 "COSMOS" satellite, and of 2G hypergravity--seven days on a centrifuge, were determined.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!