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dc.contributor.authorYang, Guiyuan
dc.contributor.authorGao, Kunshan
dc.contributor.author高昆山
dc.date.accessioned2013-02-28T08:31:43Z
dc.date.available2013-02-28T08:31:43Z
dc.date.issued2012-08
dc.identifier.citationMARINE ENVIRONMENTAL RESEARCH,2012,79:142-151zh_CN
dc.identifier.issn0141-1136
dc.identifier.urihttp://dx.doi.org/10.1016/j.marenvres.2012.06.002
dc.identifier.uriWOS:000307094000016
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/15006
dc.description.abstractWe studied the effects of elevated CO2 concentration and seawater acidity on inorganic carbon acquisition, photoinhibition and photoprotection as well as growth and respiration in the marine diatom Thalassiosira pseudonana. After having grown under the elevated CO2 level (1000 mu atm, pH 7.83) at sub-saturating photosynthetically active radiation (PAR, 75 mu mol photons m(-2) s(-1)) for 20 generations, photosynthesis and dark respiration of the alga increased by 25% (14.69 +/- 2.55 fmol C cell(-1) h(-1)) and by 35% (4.42 +/- 0.98 fmol O-2 cell(-1) h(-1)), respectively, compared to that grown under the ambient CO2 level (390 mu atm, pH 8.16), leading to insignificant effects on growth (1.09 +/- 0.08 d(-1) v 1.04 +/- 0.07 d(-1)). The photosynthetic affinity for CO2 was lowered in the high-CO2 grown cells, reflecting a down-regulation of the CO2 concentrating mechanism (CCM). When exposed to an excessively high level of PAR, photochemical and non-photochemical quenching responded similarly in the low- and high-CO2 grown cells, reflecting that photoinhibition was not influenced by the enriched level of CO2. In T pseudonana, it appeared that the energy saved due to the down-regulated CCM did not contribute to any additional light stress as previously found in another diatom Phaeodactylum tricornutum, indicating differential physiological responses to ocean acidification between these two diatom species. (C) 2012 Elsevier Ltd. All rights reserved.zh_CN
dc.description.sponsorshipNational Basic Research Program of China [2009CB421207, 2011CB200902]; National Natural Science Foundation [40930846, 41120164007]; Programs for Changjiang Scholars and Innovative Research Team [IRT0941]; China-Japan collaboration project from MOST [S2012GR0290]zh_CN
dc.language.isoenzh_CN
dc.publisherELSEVIER SCI LTDzh_CN
dc.subjectCCMzh_CN
dc.subjectCO2zh_CN
dc.subjectChlorophyll fluorescencezh_CN
dc.subjectDiatomzh_CN
dc.subjectGrowthzh_CN
dc.subjectOcean acidification; Photosynthesiszh_CN
dc.subjectRespirationzh_CN
dc.subjectThalassiosira pseudonanazh_CN
dc.titlePhysiological responses of the marine diatom Thalassiosira pseudonana to increased pCO(2) and seawater acidityzh_CN
dc.typeArticlezh_CN


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