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Temperature responses of growth, photosynthesis, fatty acid and nitrate reductase in Antarctic and temperate Stichococcus
Chen, Zhuo1,2; He, Chenliu1; Hu, Hanhua1; Hu, HH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2012
Source PublicationEXTREMOPHILES
ISSN1431-0651
Volume16Issue:1Pages:127-133
AbstractStichococcus, a genus of green algae, distributes in ice-free areas throughout Antarctica. To understand adaptive strategies of Stichococcus to permanently cold environments, the physiological responses to temperature of two psychrotolerants, S. bacillaris NJ-10 and S. minutus NJ-17, isolated from rock surfaces in Antarctica were compared with that of one temperate S. bacillaris FACHB753. Two Antarctic Stichococcus strains grew at temperature from 4 to 25A degrees C, while the temperate strain could grow above 30A degrees C but could not survive at 4A degrees C. The photosynthetic activity of FACHB753 at lower than 10A degrees C was less than that of Antarctic algae. Nitrate reductase in NJ-10 and NJ-17 had its optimal temperature at 20A degrees C, in comparison, the maximal activity of nitrate reductase in FACHB753 was found at 25A degrees C. When cultured at 4-15A degrees C a large portion of unsaturated fatty acids in the two Antarctic species was detected and the regulation of the degree of unsaturation of fatty acids by temperature was observed only above 15A degrees C, though the content of the major unsaturated fatty acid alpha C18:3 in FACHB753 decreased with the temperatures elevated from 10 to 25A degrees C. Elevated nitrate reductase activity and photosynthetic rates at low temperatures together with the high proportion of unsaturated fatty acids contribute to the ability of the Antarctic Stichococcus to thrive.; Stichococcus, a genus of green algae, distributes in ice-free areas throughout Antarctica. To understand adaptive strategies of Stichococcus to permanently cold environments, the physiological responses to temperature of two psychrotolerants, S. bacillaris NJ-10 and S. minutus NJ-17, isolated from rock surfaces in Antarctica were compared with that of one temperate S. bacillaris FACHB753. Two Antarctic Stichococcus strains grew at temperature from 4 to 25A degrees C, while the temperate strain could grow above 30A degrees C but could not survive at 4A degrees C. The photosynthetic activity of FACHB753 at lower than 10A degrees C was less than that of Antarctic algae. Nitrate reductase in NJ-10 and NJ-17 had its optimal temperature at 20A degrees C, in comparison, the maximal activity of nitrate reductase in FACHB753 was found at 25A degrees C. When cultured at 4-15A degrees C a large portion of unsaturated fatty acids in the two Antarctic species was detected and the regulation of the degree of unsaturation of fatty acids by temperature was observed only above 15A degrees C, though the content of the major unsaturated fatty acid alpha C18:3 in FACHB753 decreased with the temperatures elevated from 10 to 25A degrees C. Elevated nitrate reductase activity and photosynthetic rates at low temperatures together with the high proportion of unsaturated fatty acids contribute to the ability of the Antarctic Stichococcus to thrive.
SubtypeArticle
KeywordAntarctica Nitrate Reductase Photosynthesis Psychrotolerants Stichococcus Temperature Response
Department[Chen, Zhuo; He, Chenliu; Hu, Hanhua] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Chen, Zhuo] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
DOI10.1007/s00792-011-0412-1
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
Funding OrganizationNational Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004] ; National Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004] ; National Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004] ; National Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004]
Indexed BySCI
Language英语
WOS Research AreaBiochemistry & Molecular Biology ; Microbiology
WOS SubjectBiochemistry & Molecular Biology ; Microbiology
WOS IDWOS:000298390900012
WOS KeywordPHYTOPLANKTON ; ALGAE ; TREBOUXIOPHYCEAE ; PURIFICATION ; CHLOROPHYTA ; ADAPTATION ; MICROALGAE
Funding OrganizationNational Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004] ; National Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004] ; National Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004] ; National Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004]
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/16775
Collection藻类生物学及应用研究中心_期刊论文
Corresponding AuthorHu, HH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
Affiliation1.Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Chen, Zhuo,He, Chenliu,Hu, Hanhua,et al. Temperature responses of growth, photosynthesis, fatty acid and nitrate reductase in Antarctic and temperate Stichococcus[J]. EXTREMOPHILES,2012,16(1):127-133.
APA Chen, Zhuo,He, Chenliu,Hu, Hanhua,&Hu, HH .(2012).Temperature responses of growth, photosynthesis, fatty acid and nitrate reductase in Antarctic and temperate Stichococcus.EXTREMOPHILES,16(1),127-133.
MLA Chen, Zhuo,et al."Temperature responses of growth, photosynthesis, fatty acid and nitrate reductase in Antarctic and temperate Stichococcus".EXTREMOPHILES 16.1(2012):127-133.
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