space-biology
Space biology examines how living organisms respond to the unique conditions of spaceflight, including microgravity, cosmic radiation, and altered light cycles. For plant scientists, this field is critical for understanding how plants grow and adapt beyond Earth, informing both long-duration space missions that may rely on plant-based life support and food production, and revealing fundamental insights into plant physiology that are difficult to isolate under normal terrestrial conditions.
open_in_new WikipediaPubMed · 2026-05-01
Researchers reviewed how weightlessness in space disrupts the nervous system of C. elegans, a tiny roundworm used as a stand-in for studying biology. They found that microgravity warps neuron structure, overwhelms the brain's waste-disposal system, and scrambles chemical signals that control movement and behavior.
Microgravity causes dendritic hyperbranching and self-avoidance defects in neurons, disrupting sensory integration and receptive field structure.
Neuronal waste clearance via exopher pathways becomes less effective under microgravity, leading to proteostatic overload and neuronal stress.
Dopamine and acetylcholine signaling are notably disrupted, with serotonergic and GABA systems also showing vulnerabilities, collectively impairing locomotion and behavioral flexibility.