| 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 Publication | EXTREMOPHILES
 |
| ISSN | 1431-0651 |
| Volume | 16Issue:1Pages:127-133 |
| Abstract | 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.; 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. |
| Subtype | Article |
| Keyword | Antarctica 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 |
| DOI | 10.1007/s00792-011-0412-1 |
| WOS Headings | Science & Technology ; Life Sciences & Biomedicine |
| Funding Organization | 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] ; National Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004] |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Biochemistry & Molecular Biology ; Microbiology |
| WOS Subject | Biochemistry & Molecular Biology ; Microbiology |
| WOS ID | WOS:000298390900012 |
| WOS Keyword | PHYTOPLANKTON ; ALGAE ; TREBOUXIOPHYCEAE ; PURIFICATION ; CHLOROPHYTA ; ADAPTATION ; MICROALGAE |
| Funding Organization | 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] ; National Key Basic Research Project of China[2011CB200901]; National Natural Science Foundation of China[40606004] |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://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 Author | Hu, HH (reprint author), Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China |
| Affiliation | 1.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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