Simulated deep space exposure on seeds utilizing the MISSE flight facility

Area of Science:

• Space Biology
• Materials Science
• Astrobiology

Background:

• The Multipurpose Materials International Space Station Experiment-Flight Facility (MISSE-FF) provides a platform for external space exposure.
• Investigating the impact of the space environment on biological samples is crucial for space exploration and astrobiology.
• Understanding seed viability during space missions informs long-duration space travel and potential extraterrestrial agriculture.

Purpose of the Study:

• To evaluate the effects of prolonged space exposure on seed quality and storage.
• To test the MISSE-FF as a platform for exposing biological samples outside the International Space Station (ISS).
• To assess a novel passive sample containment canister for preserving biological sample vigor during space exposure.

Main Methods:

• The MISSE-Seed experiment utilized the MISSE-FF hardware on the ISS for an eight-month exposure period.
• Eleven diverse seed varieties were placed in newly designed passive sample containment canisters.
• Environmental data, including temperature and radiation, were recorded using dataloggers and thermoluminescent dosimeters.

Main Results:

• Post-flight germination tests were conducted to determine seed survival rates.
• Environmental profiles of temperature and radiation exposure were established for the duration of the experiment.
• The study analyzed the performance of the containment canister in protecting seed viability.

Conclusions:

• The MISSE-FF hardware is a viable platform for exposing biological samples to the space environment.
• The passive sample containment canister demonstrated capability in preserving seed vigor during space exposure.
• The findings provide essential data on seed survival and quality under multi-stressor space conditions, informing future space biology missions.