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The possible interplanetary transfer of microbes: assessing the viability of Deinococcus spp. under the ISS environmental conditions for performing exposure experiments of microbes in the Tanpopo mission
https://repo.qst.go.jp/records/46852
https://repo.qst.go.jp/records/468522b040218-03d2-4b4b-b7a2-14a9b99e5fbe
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-10-20 | |||||
| タイトル | ||||||
| タイトル | The possible interplanetary transfer of microbes: assessing the viability of Deinococcus spp. under the ISS environmental conditions for performing exposure experiments of microbes in the Tanpopo mission | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Kawaguchi, Yuko
× Kawaguchi, Yuko× Yang, Yinjie× Kawashiri, Narutoshi× Shiraishi, Keisuke× Takasu, Masako× Narumi, Issay× Satoh, Katsuya× Hashimoto, Hirofumi× Nakagawa, Kazumichi× Tanigawa, Yoshiaki× Momoki, Yoh-hei× Tanabe, Maiko× Sugino, Tomohiro× Takahashi, Yuta× Shimizu, Yasuyuki× Yoshida, Satoshi× Kobayashi, Kensei× Yokobori, Shinichi× Yamagishi, Akihiko× 河口 優子× Ｙａｎｇ Ｙｉｎｊｉｅ× 鳴海 一成× 吉田 聡× 小林 憲正× 横堀 伸一 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | To investigate the possible interplanetary transfer of life, numerous exposure experiments have been carried out on various microbes in space since the 1960s. In the Tanpopo mission, we have proposed to carry out experiments on capture and space exposure of microbes at the Exposure Facility of the Japanese Experimental Module of the International Space Station (ISS). Microbial candidates for the exposure experiments in space include Deinococcus spp.: Deinococcus radiodurans, D. aerius and D. aetherius. In this paper, we have examined the survivability of Deinococcus spp. under the environmental conditions in ISS in orbit (i.e., long exposure to heavy-ion beams, temperature cycles, vacuum and UV irradiation). A One-year dose of heavy-ion beam irradiation did not affect the viability of Deinococcus spp. within the detection limit. Vacuum (10−1 Pa) also had little effect on the cell viability. Experiments to test the effects of changes in temperature from 80 °C to −80 °C in 90 min (±80 °C/90 min cycle) or from 60 °C to −60 °C in 90 min (±60 °C/90 min cycle) on cell viability revealed that the survival rate decreased severely by the ±80 °C/90 min temperature cycle. Exposure of various thicknesses of deinococcal cell aggregates to UV radiation (172 nm and 254 nm, respectively) revealed that a few hundred micrometer thick aggregate of deinococcal cells would be able to withstand the solar UV radiation on ISS for 1 year. We concluded that aggregated deinococcal cells will survive the yearlong exposure experiments. We propose that microbial cells can aggregate as an ark for the interplanetary transfer of microbes, and we named it ‘massapanspermia’. | |||||
| 書誌情報 |
Origins of Life and Evolution of Biospheres 巻 43, 号 4/5, p. 411-428, 発行日 2013-10 |
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| 出版者 | ||||||
| 出版者 | Springer | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0169-6149 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | doi:10.1007/s11084-013-9346-1 | |||||
