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Hokkaido University Collection of Scholarly and Academic Papers >
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Application of PTR-MS to an incubation experiment of the marine diatom Thalassiosira pseudonana
| Title: | Application of PTR-MS to an incubation experiment of the marine diatom Thalassiosira pseudonana |
| Authors: | Kameyama, Sohiko Browse this author →KAKEN DB | | Tanimoto, Hiroshi Browse this author | | Inomata, Satoshi Browse this author | | Suzuki, Koji Browse this author →KAKEN DB | | Komatsu, Daisuke D. Browse this author →KAKEN DB | | Hirota, Akinari Browse this author | | Konno, Uta Browse this author | | Tsunogai, Urumu Browse this author →KAKEN DB |
| Keywords: | dimethyl sulfide | | isoprene | | methanethiol | | PTR-MS | | Thalassiosira pseudonana | | axenic culture |
| Issue Date: | 2011 |
| Publisher: | Geochemical Society of Japan |
| Journal Title: | Geochemical Journal |
| Volume: | 45 |
| Issue: | 5 |
| Start Page: | 355 |
| End Page: | 363 |
| Abstract: | Emission of trace gases from the marine diatom Thalassiosira pseudonana (CCMP 1335) was continuously monitored with a proton transfer reaction-mass spectrometry (PTR-MS) in an axenic batch culture system under a 13:11-h light:dark cycle. Substantial increases in the signals at m/z 49, 63, and 69, attributable to methanethiol, dimethyl sulfide (DMS), and isoprene, respectively, were observed in response to increases in cell density. Signals at m/z 69 showed diurnal variations throughout the experiment whereas those at m/z 49 were more pronounced at the beginning of the incubation. Interestingly, the signals at m/z 49 and 69 changed immediately following the light-dark and dark-light transitions, suggesting that light plays a crucial role in the production of methanethiol and isoprene. However, in the latter half of the experiment, methanethiol showed negligible diurnal variations regardless of light conditions, suggesting the production of methanethiol from enzymatic cleavage of DMS. The trend ill signals at m/z 63 was similar to that of the abundance of senescent cells plus cell debris rather than vegetative cells. The results suggest that aging or death of phytoplankton cells could also substantially control DMS production in natural waters along with the other microbial processes related to bacteria and zooplankton. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/50151 |
| Appears in Collections: | 環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 亀山 宗彦
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