Utilizing the KSC fixation tube to conduct human-tended plant biology experiments on a suborbital spaceflight

This research paper explores a new method for studying how plants grow in space using special tubes called KSC Fixation Tubes or "KFTs." These tubes are designed to take plant samples into suborbital flights, where they can experience microgravity-a condition similar to what astronauts feel when weightless. After the flight, these tubes help fix and preserve the plants at different stages of their journey so scientists can study them back on Earth using a technique called RNA-seq analysis. This research is important because it helps us understand how living things like plants might grow in space or other planets with less gravity than here on Earth. It could also lead to new ways for people who live and work in places where there's not much sunlight, such as underground cities or deep mines, by using this knowledge about plant growth without soil (hydroponics). This study is a step toward making life possible beyond our planet while improving how we grow food on Earth.

The research paper presents a novel methodology for studying the effects of microgravity using biological systems by employing KSC Fixation Tubes (KFTs). This approach allows scientists to transport plants into suborbital space and fix them at specific stages during flight, providing unique insights without relying on complex automation. The methodology involves inserting plant coupons onto support media within the sample side of preloaded KFTs containing RNAlater in the flixion chamber. The tubes are then activated to fixate plants at various stages during a simulated flight, which mimics real-life suborbital spaceflight experiences by Blue Origin and Virgin Galactic companies. Key findings from this study indicate that RNA sequencing analysis can be conducted on tissue samples housed within the KFTs to understand gene expression changes in plants during microgravity exposure at different stages of flight. The results demonstrate significant alterations in plant growth, development, and physiological responses due to spaceflight conditions compared to ground-based controls.