| Autor: |
Kordyum VA; Institute of Molecular Biology and Genetics, UkrSSR Acad. Sci., Kiev, USSR., Man'ko VG, Popova AF, Mashinsky AL, Shcherbak OH, Nguen HT |
| Jazyk: |
angličtina |
| Zdroj: |
Advances in space research : the official journal of the Committee on Space Research (COSPAR) [Adv Space Res] 1983; Vol. 3 (9), pp. 265-8. |
| DOI: |
10.1016/0273-1177(83)90067-4 |
| Abstrakt: |
The miniature cenosis consisting of the water fern Azolla with its associated symbiotic nitrogen-fixing cyanobacterium Anabaena and the concomitant bacteria was investigated. Ecological closure was shown to produce sharp quantitative and qualitative changes in the number and type of concomitant bacteria. Changes in the distribution of bacterial types grown on beef-extract broth after space flight were recorded. Anabaena azollae underwent the most significant changes under spaceflight conditions. Its cell number per Azolla biomass unit increased substantially. Thus closure of cenosis resulted in a weakening of control over microbial development by Azolla. This tendency was augmented by spaceflight factors. Reduction in control exerted by macro-organisms over development of associated micro-organisms must be taken into account in constructing closed ecological systems in the state of weightlessness. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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