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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
名前 / ファイル | ライセンス | Actions | |
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item type | Journal Article(1) | |||||
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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× Suzuki, Yurina× Shiraiwa, Yoshihiro |
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著者別名 |
白岩, 善博
× 白岩, 善博 |
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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 |
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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 |