An inducible CO2 concentrating mechanism in cyanobacterium Anabaena sp strain PCC7120

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	An inducible CO2 concentrating mechanism in cyanobacterium Anabaena sp strain PCC7120
	Wu, TF; Song, LR; Liu, YD
刊名	CHINESE SCIENCE BULLETIN
	1999-12-01
卷号	44 期号:23 页码:2177-2181
关键词	HCG CCM photosynthetic affinity carboxysome
ISSN号	1001-6538
通讯作者	Liu, YD, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
中文摘要	In order to define its characteristics of the photosynthetic utilization of CO2 and HCO3- when the ambient inorganic carbon changed, HCG (High-CO2-Growing Cells) of cyanobacterium Anabaena sp. strain PCC7120 were prepared. The growth rate of HCG was higher than that of LCG (low-CO2-growing cells, i.e. air-growing cells). When the HCG cells were transferred from 5% CO2 to air levels of CO2 , a series of changes took place: its carbonic anhydrase activity as well as its photosynthetic affinity to the external inorganic carbon significantly increased; the number of the carboxysomes, which is one of the most important components of CCM in cyanobacteria also increased. These facts indicated that the CCM activity of Anabaena PCC 7120 was induced. When the pH in the medium increased from 6 to 9, the photosynthetic affinity to external inorganic carbon of both HCG and LCG declined, while the apparent photosynthetic affinity to external CO2 increased. In the light of these findings, this inducible CCM in cyanobacteria provided a good model for the study of the photosynthetic Ci utilization in the phototrophic microoganisms.
英文摘要	In order to define its characteristics of the photosynthetic utilization of CO2 and HCO3- when the ambient inorganic carbon changed, HCG (High-CO2-Growing Cells) of cyanobacterium Anabaena sp. strain PCC7120 were prepared. The growth rate of HCG was higher than that of LCG (low-CO2-growing cells, i.e. air-growing cells). When the HCG cells were transferred from 5% CO2 to air levels of CO2 , a series of changes took place: its carbonic anhydrase activity as well as its photosynthetic affinity to the external inorganic carbon significantly increased; the number of the carboxysomes, which is one of the most important components of CCM in cyanobacteria also increased. These facts indicated that the CCM activity of Anabaena PCC 7120 was induced. When the pH in the medium increased from 6 to 9, the photosynthetic affinity to external inorganic carbon of both HCG and LCG declined, while the apparent photosynthetic affinity to external CO2 increased. In the light of these findings, this inducible CCM in cyanobacteria provided a good model for the study of the photosynthetic Ci utilization in the phototrophic microoganisms.
学科主题	Multidisciplinary Sciences
WOS标题词	Science & Technology
类目[WOS]	Multidisciplinary Sciences
研究领域[WOS]	Science & Technology - Other Topics
关键词[WOS]	SYNECHOCOCCUS PCC7942 ; CARBONIC-ANHYDRASE ; CARBOXYSOMES
收录类别	SCI
语种	英语
WOS记录号	WOS:000085007300014
公开日期	2010-10-13
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/152342/10156]
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	Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Wu, TF,Song, LR,Liu, YD. An inducible CO2 concentrating mechanism in cyanobacterium Anabaena sp strain PCC7120[J]. CHINESE SCIENCE BULLETIN,1999,44(23):2177-2181.
APA	Wu, TF,Song, LR,&Liu, YD.(1999).An inducible CO2 concentrating mechanism in cyanobacterium Anabaena sp strain PCC7120.CHINESE SCIENCE BULLETIN,44(23),2177-2181.
MLA	Wu, TF,et al."An inducible CO2 concentrating mechanism in cyanobacterium Anabaena sp strain PCC7120".CHINESE SCIENCE BULLETIN 44.23(1999):2177-2181.