气候变化领域集成服务门户(CCPortal): Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.826461
	Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity
	Yang; Gui yuan; Gao; Kunshan
发布日期	2012-01-21
数据集类型	dataset
英文关键词	Laboratory experiment ; Laboratory strains ; Light ; North Pacific ; Ochrophyta ; Phytoplankton ; Respiration ; Thalassiosira pseudonana
英文简介	We 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 µatm, pH 7.83) at sub-saturating photosynthetically active radiation (PAR, 75 µmol photons/m**2/s) for 20 generations, photosynthesis and dark respiration of the alga increased by 25% (14.69 ± 2.55 fmol C/cell/h) and by 35% (4.42 ± 0.98 fmol O2/cell/h), respectively, compared to that grown under the ambient CO2 level (390 µatm, pH 8.16), leading to insignificant effects on growth (1.09 ± 0.08 (1/d))v 1.04 ± 0.07 (1/d)). 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.
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/217550
推荐引用方式 GB/T 7714	Yang,Gui yuan,Gao,et al. Physiological responses of the marine diatom Thalassiosira pseudonana to increased pCO2 and seawater acidity.2012-01-21.https://doi.org/10.1594/PANGAEA.826461.