Horneck G, Bucker H, Dose K, Martens K D, Bieger A, Mennigmann H D, Reitz G, Requardt H, Weber P
Biophysics Div., Institute for Aerospace Medicine, DFVLR, Koln, FRG.
Adv Space Res. 1984;4(10):19-27. doi: 10.1016/0273-1177(84)90220-5.
Bacterial spores are proper test organisms for studying problems of space biology and exobiology. During the Spacelab 1 mission, studies on the limiting factors for survival of Bacillus subtilis spores in free space have been performed. An exposure tray on the pallet of Spacelab 1 accomodated 316 samples of dry spores for treatment with space vacuum and/or the following selected wavelengths of solar UV: > 170 nm, 220 nm, 240nm, 260nm and 280 nm. After recovery, inactivation, mutation induction, reparability, and photochemical damages in DNA and protein have been studied. The results contribute to the understanding of the mechanisms of increased UV sensitivity of bacterial spores in vacuo and to a better assessment of the chance of survival of resistant forms in space and of interplanetary transfer of life.
细菌芽孢是研究空间生物学和外空生物学问题的合适试验生物。在“空间实验室1号”任务期间，进行了关于枯草芽孢杆菌芽孢在自由空间中生存限制因素的研究。“空间实验室1号”实验舱平台上的一个暴露托盘容纳了316份干燥芽孢样本，用于进行空间真空处理和/或以下选定波长的太阳紫外线照射：>170纳米、220纳米、240纳米、260纳米和280纳米。回收后，研究了DNA和蛋白质中的失活、诱变、可修复性以及光化学损伤。这些结果有助于理解细菌芽孢在真空中紫外线敏感性增加的机制，并更好地评估抗性形式在空间中的生存机会以及生命在行星间转移的可能性。
