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Selection and ultrastructural observation of a high-CO2-requiring mutant of cyanobacterium Synechococcus sp PCC7942
WU Tianfu; LIU Yongding; SONG Lirong; Song, LR, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2000
Source PublicationACTA BOTANICA SINICA
Volume42Issue:2Pages:116-121
AbstractA high-CO2-requiring mutant of Synechococcus sp. PCC7942 las been isolated after chemical mutagenesis of ethyl methane sulphonate (EMS). It was able to grow at 4% CO2, but not under ambient CO2. The initial screening of the mutant showed that the genetic reversion rate was about 10(-7) and death occurred 2 -3 days after being transferred from 4% CO2 to the ambient air. Its photosynthetic dependence on external dissolved inorganic carbon was higher than that of the wild type cells, but its carbonic anhydrase activity was comparatively low. In the ultrastructural level, various types of aberrant carboxysomes appeared in the mutant cells: rod-shaped carboxysomes, irregular carboxysomes and the "empty-inclusion carboxysomes" with increasing number of glycogen granules surrounding the thylakoids. All these alterations indicated that the mutant was defective in utilizing the external CO2. The induction of carboxysomes by lower levels of CO2 and the biogenesis of carboxysomes are herein discussed.
KeywordCyanobacteria Synechococcus High-co2-requiring Mutant Carboxysomes
DepartmentChinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Subject AreaBiochemistry & Molecular Biology ; Plant Sciences
Indexed BySCI
WOS IDWOS:000085772500002
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Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/152342/10144
Collection期刊论文
Corresponding AuthorSong, LR, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
WU Tianfu,LIU Yongding,SONG Lirong,et al. Selection and ultrastructural observation of a high-CO2-requiring mutant of cyanobacterium Synechococcus sp PCC7942[J]. ACTA BOTANICA SINICA,2000,42(2):116-121.
APA WU Tianfu,LIU Yongding,SONG Lirong,&Song, LR, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China.(2000).Selection and ultrastructural observation of a high-CO2-requiring mutant of cyanobacterium Synechococcus sp PCC7942.ACTA BOTANICA SINICA,42(2),116-121.
MLA WU Tianfu,et al."Selection and ultrastructural observation of a high-CO2-requiring mutant of cyanobacterium Synechococcus sp PCC7942".ACTA BOTANICA SINICA 42.2(2000):116-121.
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