Influence of different natural physical fields on biological processes.
In space flight conditions gravity, magnetic, and electrical fields as well as ionizing radiation change both in size, and in direction. This causes disruptions in the conduct of some physical processes, chemical reactions, and metabolism in living organisms. In these conditions organisms of different phylogenetic level change their metabolic reactions undergo changes such as disturbances in ionic exchange both in lower and in higher plants, changes in cell morphology for example, gyrosity in Proteus (Proteus vulgaris), spatial disorientation in coleoptiles of Wheat (Triticum aestivum) and Pea (Pisum sativum) seedlings, mutational changes in Crepis (Crepis capillaris) and Arabidopsis (Arabidopsis thaliana) seedling. It has been found that even in the absence of gravity, gravireceptors determining spatial orientation in higher plants under terrestrial conditions are formed in the course of ontogenesis. Under weightlessness this system does not function and spatial orientation is determined by the light flux gradient or by the action of some other factors. Peculiarities of the formation of the gravireceptor apparatus in higher plants, amphibians, fish, and birds under space flight conditions have been observed. It has been found that the system in which responses were accompanied by phase transition have proven to be gravity-sensitive under microgravity conditions. Such reactions include also the process of photosynthesis which is the main energy production process in plants. In view of the established effects of microgravity and different natural physical fields on biological processes, it has been shown that these processes change due to the absence of initially rigid determination. The established biological effect of physical fields influence on biological processes in organisms is the starting point for elucidating the role of gravity and evolutionary development of various organisms on Earth.
Mashinsky
A L
AL
Science-Technical Center "Ecology and Space", Timura Frunze 34-7, 119021 Moscow, Russia. spacemal@stk.mmtel.ru
D000222:Adaptation, Physiological / Q000502:physiology*; D000490:Allium / Q000502:physiology; D001412:Bacillus subtilis / Q000502:physiology; D002708:Chlorella / Q000502:physiology; D002869:Chromosome Aberrations; D027468:Crepis / Q000502:physiology; D004783:Environmental Microbiology; D004926:Escherichia coli / Q000502:physiology; D027805:Phaseolus / Q000502:physiology; D018521:Plant Physiological Phenomena; D011514:Proteus vulgaris / Q000502:physiology; D011549:Pseudomonas / Q000502:physiology; D013026:Space Flight; D014893:Weightlessness