Abstract
For humanity to complete its ambitious solar system exploration, it is crucial to comprehend how terrestrial life reacts to differing planet gravity. We followed the life trajectory of an earth cotton seed's germination, development, and ultimate fate after prolonged exposure to extremely low temperatures using the life-regeneration ecosystem carried by Chang'e 4 probe, which landed on the Moon on January 3rd, 2019, for the first time in human history. In a controlled environment with similar characteristics, such as temperature, humidity, air pressure, and nutrition, we compared this life trajectory on the moon to that on Earth, except for the differences in gravity, light, and radiation. We discovered that the 1/6 g moon gravity speeds up seed germination. Surprisingly, Moon seed-lings demonstrated rapid acclimatization to super-freezing (below minus 52 degrees Celsius) under 1/6 g lunar gravity, maintaining upright and green despite exposure to long-term extremely cold temperatures for 18–24 hours. Based on cellular and molecular reactions caused by moon-low gravity, we suggest probable mechanisms for cold resilience. These unique findings will enhance our understanding of how plants adapt to suboptimal environmental conditions in space.
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Acknowledgments
Gengxin Xie acknowledges the support by The Third Pre-research Projects of the Civil Space Project from China National Space Administration (CNSA), “The Key Technology for the Construction of Micro-Ecospheres Adapted to the Lunar Environment.” (NO. 6141A020221) and Ministry of Education Equipment Pre-research Joint Fund of the Ministry of Education, “The Key Technologies for the Construction and Control of Bioregenerative Life Support Systems.” (NO. 8091B010103).
Funding
This research was funded by The Third Pre-research Projects of the Civil Space Project from China National Space Administration (CNSA), “The Key Technology for the Construction of Micro-Ecospheres Adapted to the Lunar Environment.”, grant number 6141A020221” and Ministry of Education Equipment Pre-research Joint Fund of the Ministry of Education, “The Key Technologies for the Construction and Control of Bioregenerative Life Support Systems”, grant number 8091B010103. The Third Pre-research Projects of the Civil Space Project from China National Space Administration (CNSA),“The Key Technology for the Construction of Micro-Ecospheres Adapted to the Lunar Environment.”,NO. 6141A020221,Ministry of Education Equipment Pre-research Joint Fund of the Ministry of Education,“The Key Technologies for the Construction and Control of Bioregenerative Life Support Systems.”,NO. 8091B010103
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General manager, proposing research, Gengxin Xie.; main manuscript writing, Jing Yang; participating in manuscript writing and research, Yuxuan Xu.; participating in research, Yuanxun Zhang, Dan Qiu. and Jinghang Ding; All authors have read and agreed to the published version of the manuscript.
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Xie, G., Yang, J., Xu, Y. et al. The Lunar One-Sixth Low Gravity Conduciveness to the Improvement of the Cold Resistance of Plants. Microgravity Sci. Technol. 35, 35 (2023). https://doi.org/10.1007/s12217-023-10058-9
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DOI: https://doi.org/10.1007/s12217-023-10058-9