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Importance of intracellular Fe pools on growth of marine diatoms by using unialgal cultures and on the Oyashio region phytoplankton community during spring

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この文献へのリンクには次のURLを使用してください:http://hdl.handle.net/2115/49807

タイトル: Importance of intracellular Fe pools on growth of marine diatoms by using unialgal cultures and on the Oyashio region phytoplankton community during spring
著者: Sugie, Koji 著作を一覧する
Kuma, Kenshi 著作を一覧する
Fujita, Satoshi 著作を一覧する
Ushizaka, Satomi 著作を一覧する
Suzuki, Koji 著作を一覧する
Ikeda, Tsutomu 著作を一覧する
キーワード: Fe storage
intracellular Fe
luxury Fe uptake
Centric diatoms
Survival strategy
発行日: 2011年 4月
出版者: Springer Verlag
誌名: Journal of Oceanography
巻: 67
号: 2
開始ページ: 183
終了ページ: 196
出版社 DOI: 10.1007/s10872-011-0017-4
抄録: We report on the ability for luxury Fe uptake and the potential for growth utilizing intracellular Fe pools for 4 coastal centric diatom isolates and in situ phytoplankton assemblages, mainly composed of diatoms. Iron uptake of the diatom isolates and natural phytoplankton assemblages in the Oyashio region during spring blooms were prevented by adding hydroxamate siderophore desferrioxamine B (DFB). After the addition of DFB, intracellular Fe in the diatom isolates supported 2.4–4.2 cell divisions with 1.2–2.6 Chl a doublings. The intracellular Fe was primarily used for cell generation rather than Chl a production, leading to a reduction in the Chl a cell quota in the Fe-starved cells with time. The metabolic properties of the Fe-starved cells with their cell morphologies were different among species or genera. An on-deck incubation experiment also exhibited 1.9 cell divisions and 0.81 Chl a doublings of phytoplankton after the addition of DFB, also indicating the preference of cell generation over Chl a production. A decrease in the level of cellular Chl a, a main light-harvesting pigment in Fe-starved diatoms, may become a superior survival strategy to protect the cells from high irradiance that can cause photo-oxidative damages through photosynthesis. Such relatively low-Fe with high-light conditions could often occur in surface waters of the Oyashio region from spring to summer
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/49807
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 杉江 恒二

 

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