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Application of PTR-MS to an incubation experiment of the marine diatom Thalassiosira pseudonana

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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)

Submitter: 亀山 宗彦

 

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