Plants can provide self-sustaining oxygen generation in closed environments.
Plants play a central role in bioregenerative life support systems by performing gas exchange, producing oxygen, and regenerating resources within closed environments such as spacecraft or habitats.
The retrieved literature consistently supports the claim that plants and photosynthetic organisms can supply oxygen and regenerate resources in closed-loop, self-sustaining environments like space habitats. Multiple studies (0, 2, 4, 5) detail the integration of plants and algae into Bioregenerative Life Support Systems (BLSS) specifically for oxygen generation and air revitalization. No papers refute the claim.
Nie H, Zhou W, Zheng Z, Deng Y, Zhang W, Zhang M, Jiang Z, Zheng H, Yuan L, Yang J, Wang H. Exploring plant responses to altered gravity for advancing space agriculture.. 2025. https://doi.org/10.1016/j.xplc.2025.101370
Paper [0] highlights that plants are vital for space exploration because they provide oxygen and food while contributing to water regeneration.
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Amitrano C, Arena C, De Pascale S, Pugliese M, Barozzi F, Fanizzi FP, De Micco V, di Sansebastiano GP. Aquatic bryophytes as biofilters and resource regenerators in Bioregenerative Life Support Systems: the moss on Mars project.. 2025. https://doi.org/10.3389/fpls.2025.1667463
Paper [2] demonstrates that aquatic bryophytes can function as resource regenerators and gas-exchange components in Bioregenerative Life Support Systems.
Fais G, Ghiani F, Dessì D, Casula M, Perra G, Torchia E, Lai N, Cao G, Concas A. Superfood potential of Chlorella vulgaris: productivity and antioxidant boost under simulated moon and microgravity conditions.. 2025. https://doi.org/10.1038/s41526-025-00550-4
Paper [4] finds that photosynthetic microalgae like Chlorella vulgaris are effective sources of biomass, antioxidants, and oxygen in closed habitats under simulated space conditions.
Esposito M, Tonietti L, Santomartino R, Giovannelli D, Chianese E, Rotundi A, Romano I, Poli A, Finore I, Cordone A, Di Donato P. Integrating resource utilization and bioregenerative life support systems for sustainable space exploration.. 2026. https://doi.org/10.3389/fmicb.2026.1837116
Paper [5] discusses how plant-growth components act as key biological subsystems for internal loop closure, regenerating air and oxygen in sustainable space life support systems.
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