Role of Metabolic Gases in Reproductive Failure Under Spaceflight Conditions: Ground Based Studies With Arabidopsis 961391
Results obtained during the shuttle mid-deck locker experiment CHROMEX-03 suggested that failure of reproductive development of plants during spaceflight was related to a limitation in availability of metabolic gases to developing tissues due to the lack of convective air movement in microgravity. The purpose of this ground-based experiment was to determine the effect of different O2 and CO2 concentrations on plant reproductive development and growth. Fourteen day old Arabidopsis thaliana (L.) Heynh plants were grown as for the spaceflight experiment and exposed for six days to either air or one of six different air/nitrogen dilutions. Growth and reproductive responses to treatments of less than 50 mL·L-1 O2, 100 μL·L-1 CO2 were significantly different (P=0.05) from each other and all other treatments, while responses to treatments with greater than 140 mL·L-1 O2, 300 μL·L-1 CO2 were not significantly different from the air treatment. The results support our initial interpretation of the causes of reproductive failure in Arabidopsis during spaceflight and may be useful in designing future plant habitats.
Citation: Crispi, M., Porterfield, D., Murgia, M., and Musgrave, M., "Role of Metabolic Gases in Reproductive Failure Under Spaceflight Conditions: Ground Based Studies With Arabidopsis," SAE Technical Paper 961391, 1996, https://doi.org/10.4271/961391. Download Citation
Mark L. Crispi, D. Marshall Porterfield, Meri Murgia, Mary E. Musgrave
Louisiana State Univ.
International Conference On Environmental Systems
SAE 1996 Transactions - Journal of Aerospace-V105-1