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  1. 生命環境系 (Faculty of Life and Environmental Sciences)
  2. 白岩 善博 (Shiraiwa Yoshihiro)
  1. コンテンツタイプ (Contents Type)
  2. 雑誌発表論文等 (Journal article, etc.)
  3. P~
  4. Photosynthesis research

Difference in physiological responses of growth, photosynthesis and calcification of the coccolithophore Emiliania huxleyi to acidification by acid and CO2 enrichment

http://hdl.handle.net/2241/00121979
82c78200-aa63-4174-a55c-448afa06e6d6
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名前 / ファイル ライセンス Actions
PR_121-2・3.pdf PR_121-2・3 (1.1 MB)
item type Journal Article(1)
公開日 2014-08-25
タイトル
タイトル Difference in physiological responses of growth, photosynthesis and calcification of the coccolithophore Emiliania huxleyi to acidification by acid and CO2 enrichment
言語
言語 eng
資源タイプ
タイプ journal article
著者 Fukuda, Shin-ya

× Fukuda, Shin-ya

WEKO 107714

Fukuda, Shin-ya

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Suzuki, Yurina

× Suzuki, Yurina

WEKO 107715

Suzuki, Yurina

Search repository
Shiraiwa, Yoshihiro

× Shiraiwa, Yoshihiro

WEKO 107716

Shiraiwa, Yoshihiro

Search repository
著者別名 白岩, 善博

× 白岩, 善博

WEKO 107717

白岩, 善博

Search repository
抄録
内容記述 Ocean acidification, one of the great global environmental issues at present, is expected to result in serious damage on marine calcareous organisms such as corals and calcifying algae, which potentially release huge amounts of CO2 from the ocean to the atmosphere. The coccolithophore, Emiliania huxleyi (Haptophyceae), which frequently produces blooms, has greatly contributed to the biological CO2 pump. This study was aimed at analyzing effects of how E. huxleyi responds to acidification. Acidification was performed by two methods, namely by just adding HCl under bubbling ordinary air at 8.2–8.4, 7.6–7.8 and 7.1–7.3 (acidification by HCl) and by bubbling with ordinary air or with increased CO2 concentration such as 406, 816 and 1,192 ppm that maintained pH of the medium at 8.0–8.3, 7.6–7.9 and 7.5–7.7 (acidification by CO2 enrichment). As a result, cell growth and cellular calcification of E. huxleyi were strongly damaged by acidification by HCl, but not by acidification by CO2 enrichment. The activities of photosystems such as F v/F m and ϕPSII were not affected by any acidification conditions while photosynthetic O2 evolution was slightly stimulated. A 45Ca-radiotracer experiment revealed that Ca2+-uptake was strongly suppressed by acidification with HCl. This suppression recovered after increasing the dissolved inorganic carbon (DIC) concentration and further stimulated by an additional increase in DIC concentration. The production of storage and coccolith polysaccharides was increased by acidification by HCl and also highly stimulated by acidification with CO2 enrichment. The present study clearly showed that the coccolithophore, E. huxleyi, has an ability to respond positively to acidification with CO2 enrichment, but not just acidification.
書誌情報 Photosynthesis research

巻 121, 号 2-3, p. 299-309, 発行日 2014-09
ISSN
収録物識別子 0166-8595
書誌レコードID
収録物識別子 AA00362200
PubMed番号
関連識別子
関連識別子 24500605
DOI
関連識別子
関連識別子 10.1007/s11120-014-9976-9
権利
権利情報 © The Author(s) 2014. This article is published with open access at Springerlink.com
著者版フラグ
値 publisher
出版者
出版者 Springer Netherlands
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