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Effects of CO2 concentrations on the freshwater microalgae, Chlamydomonas reinhardtii, Chlorella pyrenoidosa and Scenedesmus obliquus (Chlorophyta)
Yang, Y; Gao, KS; Gao, KS, Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China
2003
Source PublicationJOURNAL OF APPLIED PHYCOLOGY
Volume15Issue:5Pages:379-389
AbstractIn order to investigate the possible impacts of increased atmospheric CO2 levels on algal growth and photosynthesis, the influence of CO2 concentration was tested on three planktonic algae (Chlamydomonas reinhardtii, Chlorella pyrenoidosa, and Scenedesmus obliquus). Increased CO2 concentration enhanced significantly the growth rate of all three species. Specific growth rates reached maximal values at 30, 100, and 60 muM CO2 in C. reinhardtii, C pyrenoidosa, and S. obliquus, respectively. Such significant enhancement of growth rate with enriched CO2 was also confirmed at different levels of inorganic N and P, being more profound at limiting levels of N in C pyrenoidosa and P in S. obliquus. The maximal rates of net photosynthesis, photosynthetic efficiency and light-saturating point increased significantly (p<0.05) in high-CO2-grown cells. Elevation of the CO2 levels in cultures enhanced the photoinhibition of C. reinhardtii, but reduced that of C pyrenoidosa and S. obliquus when exposed to high photon flux density. The photo-inhibited cells recovered to some extent (from 71% to 99%) when placed under dim light or in darkness, with better recovery in high-CO2-grown C. pyrenoidosa and S. obliquus. Although pH and pCO(2) effects cannot be distinguished from this study, it can be concluded that increased CO2 concentrations with decreased pH could affect the growth rate and photosynthetic physiology of C. reinhardtii, C. pyrenoidosa, and S. obliquus.
KeywordChlamydomonas Reinhardtii Chlorella Pyrenoidosa Co2 Growth Nutrient Photoinhibition Photosynthesis Scenedesmus Obliquus
DepartmentShantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China; Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
Subject AreaBiotechnology & Applied Microbiology ; Marine & Freshwater Biology
Indexed BySCI
WOS IDWOS:000186461300003
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/9614
Collection期刊论文
Corresponding AuthorGao, KS, Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Yang, Y,Gao, KS,Gao, KS, Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China. Effects of CO2 concentrations on the freshwater microalgae, Chlamydomonas reinhardtii, Chlorella pyrenoidosa and Scenedesmus obliquus (Chlorophyta)[J]. JOURNAL OF APPLIED PHYCOLOGY,2003,15(5):379-389.
APA Yang, Y,Gao, KS,&Gao, KS, Shantou Univ, Inst Marine Biol, Shantou 515063, Guangdong, Peoples R China.(2003).Effects of CO2 concentrations on the freshwater microalgae, Chlamydomonas reinhardtii, Chlorella pyrenoidosa and Scenedesmus obliquus (Chlorophyta).JOURNAL OF APPLIED PHYCOLOGY,15(5),379-389.
MLA Yang, Y,et al."Effects of CO2 concentrations on the freshwater microalgae, Chlamydomonas reinhardtii, Chlorella pyrenoidosa and Scenedesmus obliquus (Chlorophyta)".JOURNAL OF APPLIED PHYCOLOGY 15.5(2003):379-389.
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