Effects of CO2 enrichment on the bloom-forming cyanobacterium Microcystis aeruginosa (Cyanophyceae): Physiological responses and relationships with the availability of dissolved inorganic carbon

CORC > 水生生物研究所 > 中科院水生所知识产出（2009年前） > 期刊论文

	Effects of CO2 enrichment on the bloom-forming cyanobacterium Microcystis aeruginosa (Cyanophyceae): Physiological responses and relationships with the availability of dissolved inorganic carbon
	Qiu, BS ; Gao, KS
刊名	JOURNAL OF PHYCOLOGY
	2002-08-01
卷号	38 期号:4 页码:721-729
关键词	blue-green alga carbon dioxide cyanobacterium dissolved inorganic carbon elevated CO2 growth Microcystis aeruginosa photosynthesis
ISSN号	0022-3646
通讯作者	Qiu, BS, Cent China Normal Univ, Coll Life Sci, Wuhan 430072, Hubei, Peoples R China
中文摘要	Microcystis aeruginosa Kutz. 7820 was cultured at 350 and 700 muL.L-1 CO2 to assess the impacts of doubled atmospheric CO2 concentration on this bloom-forming cyanobacterium. Doubling Of CO2 concentration in the airflow enhanced its growth by 52%-77%, with pH values decreased and dissolved inorganic carbon (DIC) increased in the medium. Photosynthetic efficiencies and dark respiratory rates expressed per unit chl a tended to increase with the doubling of CO2. However, saturating irradiances for photosynthesis and light-saturated photosynthetic rates normalized to cell number tended to decrease with the increase of DIC in the medium. Doubling of CO2 concentration in the airflow had less effect on DIC-saturated photosynthetic rates and apparent photosynthetic affinities for DIC. In the exponential phase, CO2 and HCO3- levels in the medium were higher than those required to saturate photosynthesis. Cultures with surface aeration were DIC limited in the stationary phase. The rate of CO2 dissolution into the liquid increased proportionally when CO2 in air was raised from 350 to 700 muL.L-1, thus increasing the availability of DIC in the medium and enhancing the rate of photosynthesis. Doubled CO2 could enhance CO2 dissolution, lower pH values, and influence the ionization fractions of various DIC species even when the photosynthesis was not DIC limited. Consequently, HCO3- concentrations in cultures were significantly higher than in controls, and the photosynthetic energy cost for the operation of CO2 concentrating mechanism might decrease.
英文摘要	Microcystis aeruginosa Kutz. 7820 was cultured at 350 and 700 muL.L-1 CO2 to assess the impacts of doubled atmospheric CO2 concentration on this bloom-forming cyanobacterium. Doubling Of CO2 concentration in the airflow enhanced its growth by 52%-77%, with pH values decreased and dissolved inorganic carbon (DIC) increased in the medium. Photosynthetic efficiencies and dark respiratory rates expressed per unit chl a tended to increase with the doubling of CO2. However, saturating irradiances for photosynthesis and light-saturated photosynthetic rates normalized to cell number tended to decrease with the increase of DIC in the medium. Doubling of CO2 concentration in the airflow had less effect on DIC-saturated photosynthetic rates and apparent photosynthetic affinities for DIC. In the exponential phase, CO2 and HCO3- levels in the medium were higher than those required to saturate photosynthesis. Cultures with surface aeration were DIC limited in the stationary phase. The rate of CO2 dissolution into the liquid increased proportionally when CO2 in air was raised from 350 to 700 muL.L-1, thus increasing the availability of DIC in the medium and enhancing the rate of photosynthesis. Doubled CO2 could enhance CO2 dissolution, lower pH values, and influence the ionization fractions of various DIC species even when the photosynthesis was not DIC limited. Consequently, HCO3- concentrations in cultures were significantly higher than in controls, and the photosynthetic energy cost for the operation of CO2 concentrating mechanism might decrease.
学科主题	Plant Sciences; Marine & Freshwater Biology
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Plant Sciences ; Marine & Freshwater Biology
研究领域[WOS]	Plant Sciences ; Marine & Freshwater Biology
关键词[WOS]	BUOYANCY REGULATION ; SYNECHOCOCCUS-LEOPOLIENSIS ; PLANT-GROWTH ; DIOXIDE ; PHOTOSYNTHESIS ; LIGHT ; AIR ; PHYTOPLANKTON ; ADAPTATION ; IRRADIANCE
收录类别	SCI
语种	英语
WOS记录号	WOS:000177836500012
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/9808]
专题	水生生物研究所_中科院水生所知识产出（2009年前）_期刊论文
作者单位	1.Cent China Normal Univ, Coll Life Sci, Wuhan 430072, Hubei, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China 3.Shantou Univ, Ctr Sci, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Qiu, BS,Gao, KS. Effects of CO2 enrichment on the bloom-forming cyanobacterium Microcystis aeruginosa (Cyanophyceae): Physiological responses and relationships with the availability of dissolved inorganic carbon[J]. JOURNAL OF PHYCOLOGY,2002,38(4):721-729.
APA	Qiu, BS,&Gao, KS.(2002).Effects of CO2 enrichment on the bloom-forming cyanobacterium Microcystis aeruginosa (Cyanophyceae): Physiological responses and relationships with the availability of dissolved inorganic carbon.JOURNAL OF PHYCOLOGY,38(4),721-729.
MLA	Qiu, BS,et al."Effects of CO2 enrichment on the bloom-forming cyanobacterium Microcystis aeruginosa (Cyanophyceae): Physiological responses and relationships with the availability of dissolved inorganic carbon".JOURNAL OF PHYCOLOGY 38.4(2002):721-729.