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Differential physiological responses of the coastal cyanobacterium Synechococcus sp PCC7002 to elevated pCO(2) at lag, exponential, and stationary growth phases
Mou, Shanli; Li, Gang1; Li, Hongmei; Li, Fazhong2; Shao, Zhisheng2; Li, Jinsong2; Qu, Changfeng3; Zhang, Yongyu
2018
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume61Issue:10Pages:1397
AbstractWe studied the effects of expected end-of-the-century pCO(2) (1000 ppm) on the photosynthetic performance of a coastal marine cyanobacterium Synechococcus sp. PCC7002 during the lag, exponential, and stationary growth phases. Elevated pCO(2) significantly stimulated growth, and enhanced the maximum cell density during the stationary phase. Under ambient pCO(2) conditions, the lag phase lasted for 6 days, while elevated pCO(2) shortened the lag phase to two days and extended the exponential phase by four days. The elevated pCO(2) increased photosynthesis levels during the lag and exponential phases, but reduced them during the stationary phase. Moreover, the elevated pCO(2) reduced the saturated growth light (Ik) and increased the light utilization efficiency (alpha) during the exponential and stationary phases, and elevated the phycobilisome: chlorophyll a (Chl a) ratio. Furthermore, the elevated pCO(2) reduced the particulate organic carbon (POC):Chl a and particulate organic nitrogen (PON):Chl a ratios during the lag and stationary phases, but enhanced them during the exponential phase. Overall, Synechococcus showed differential physiological responses to elevated pCO(2) during different growth phases, thus providing insight into previous studies that focused on only the exponential phase, which may have biased the results relative to the effects of elevated pCO(2) in ecology or aquaculture.
DepartmentLMB
KeywordElevated pCO(2) Lag Exponential and stationary phases Photosynthetic performance Synechococcus
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17627
Collection中科院海洋生物资源可持续利用重点实验室
Affiliation1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Shandong Prov Key Lab Energy Genet, Key Lab Biofuels, Qingdao 266101, Peoples R China
2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China
3.China Natl Offshore Oil Corp Ltd, Zhanjiang Branch, Zhanjiang 524000, Peoples R China
4.State Ocean Adm, Inst Oceanog 1, Key Lab Marine Bioact Subst, Qingdao 266061, Peoples R China
Recommended Citation
GB/T 7714
Mou, Shanli,Li, Gang,Li, Hongmei,et al. Differential physiological responses of the coastal cyanobacterium Synechococcus sp PCC7002 to elevated pCO(2) at lag, exponential, and stationary growth phases[J]. SCIENCE CHINA-EARTH SCIENCES,2018,61(10):1397, 1405.
APA Mou, Shanli.,Li, Gang.,Li, Hongmei.,Li, Fazhong.,Shao, Zhisheng.,...&Zhang, Yongyu.(2018).Differential physiological responses of the coastal cyanobacterium Synechococcus sp PCC7002 to elevated pCO(2) at lag, exponential, and stationary growth phases.SCIENCE CHINA-EARTH SCIENCES,61(10),1397.
MLA Mou, Shanli,et al."Differential physiological responses of the coastal cyanobacterium Synechococcus sp PCC7002 to elevated pCO(2) at lag, exponential, and stationary growth phases".SCIENCE CHINA-EARTH SCIENCES 61.10(2018):1397.
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