For the first time, vegetation of plants of radish and cabbage from a
seed to the harvest age was performed in the conditions of space fligh
t. The duration of the experiment was 54 days. The growth and developm
ent of the plants lagged behind the Earth control, and the harvest was
by 2-5 times lower than in the control. The radish plants formed root
s. Some deviations were found in the plant metabolism. At a practicall
y similar composition of the biomass of the experiment and control pla
nts, the experimental ones manifested some differences in the fraction
al composition of several compounds (nitrogen, phosphorus, carbohydrat
es, lipids) at the account of decrease of compounds playing the primar
y role in the energy exchange of the cell. A tendency was noticed towa
rds a decrease of potassium content in the cells of the experiment pla
nts. For other biogenic elements (iron, manganese, copper, zinc) there
were no differences between the experiment and control. The obtained
results did not show any difference in the plant metabolism which coul
d testify to its impairment resulting in the death of the plants or im
possibility of maintaining trophic connections in the future life supp
ort systems.