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Mechanism of photosynthetic response in Microcystis aeruginosa PCC7806 to low inorganic phosphorus
Wang, Zhicong; Li, Dunhai; Li, Guowen; Liu, Yongding; Li, DH, Chinese Acad Sci, Inst Hydrobiol, 7 S Donghu Rd, Wuhan 430072, Peoples R China
2010
Source PublicationHARMFUL ALGAE
ISSN1568-9883
Volume9Issue:6Pages:613-619
AbstractPhotosynthetic response of Microcystis aeruginosa PCC7806 to different concentrations of phosphorus supply was studied so as to elucidate if the declining process of Microcystis bloom under freshwater ecosystem is related to soluble reactive phosphorus (SRP) decrease in water volume. Growth rate of M. aeruginosa PCC7806 was significantly reduced under P-deficient conditions, and its photosynthetic activity in terms of rETR(max) (maximum electron transport rate) decreased significantly after 48 h growth, while it kept elevating and reached to a relative stable value when supplied with rich phosphorus of 0.6 mg/L With the increasing actinic irradiance along the rapid light curves of M. aeruginosa PCC7806 cultured under low-phosphorus level, qP (photochemical quenching) and rETR (relative electron transport rate) decreased greatly, and the increase in qN (non-photochemical quenching) and Phi(ps) (actual photochemical efficiency of PSII) was obviously inhibited. The affinity of M. aeruginosa PCC7806 to inorganic carbon was reduced evidently in 0.02 mg/L P compared with in 0.6 mg/L P. When P was reduced from 0.6 to 0.02 mg/L, the decreasing rate of rETR(max) (77%) was significantly greater than that of photosynthetic carbon assimilation (22%), which indicated that down-regulation of CO2 affinity caused by P-deficiency was, but not the only reason that resulted in the decline of photosynthetic efficiency. Instantaneous low-temperature significantly limited rETR(max) under rich-P condition but had no effect on it when P was insufficient, and 1% ethanol could enhance rETR(max) at low-P level but did not influence it at rich-P level. These two results proved that the decrease in thylakoid membrane fluidity caused by P-deficiency was another important reason that results in the decline of photosynthetic efficiency of M. aruginosa PCC7806. (c) 2010 Elsevier B.V. All rights reserved.
KeywordChlorophyll Fluorescence Microcystis Aeruginosa Pcc7806 Phosphorus-deficiency Photosynthetic Response Thylakoid Membrane Fluidity
Department[Wang, Zhicong; Li, Dunhai; Li, Guowen; Liu, Yongding] Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China; [Wang, Zhicong; Li, Guowen] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Subject AreaMarine & Freshwater Biology
Funding OrganizationNational Basic Research and Development Plan [2008CB418002]; National Major Programs of Water Body Pollution Control and Remediation [2008ZX07103-004-01-01, 2008ZX07104-005-3] ; National Basic Research and Development Plan [2008CB418002]; National Major Programs of Water Body Pollution Control and Remediation [2008ZX07103-004-01-01, 2008ZX07104-005-3] ; National Basic Research and Development Plan [2008CB418002]; National Major Programs of Water Body Pollution Control and Remediation [2008ZX07103-004-01-01, 2008ZX07104-005-3] ; National Basic Research and Development Plan [2008CB418002]; National Major Programs of Water Body Pollution Control and Remediation [2008ZX07103-004-01-01, 2008ZX07104-005-3]
Indexed BySCI
Language英语
WOS IDWOS:000281999300011
Funding OrganizationNational Basic Research and Development Plan [2008CB418002]; National Major Programs of Water Body Pollution Control and Remediation [2008ZX07103-004-01-01, 2008ZX07104-005-3] ; National Basic Research and Development Plan [2008CB418002]; National Major Programs of Water Body Pollution Control and Remediation [2008ZX07103-004-01-01, 2008ZX07104-005-3] ; National Basic Research and Development Plan [2008CB418002]; National Major Programs of Water Body Pollution Control and Remediation [2008ZX07103-004-01-01, 2008ZX07104-005-3] ; National Basic Research and Development Plan [2008CB418002]; National Major Programs of Water Body Pollution Control and Remediation [2008ZX07103-004-01-01, 2008ZX07104-005-3]
Citation statistics
Cited Times:52[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/13681
Collection水环境工程研究中心_期刊论文
Corresponding AuthorLi, DH, Chinese Acad Sci, Inst Hydrobiol, 7 S Donghu Rd, Wuhan 430072, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zhicong,Li, Dunhai,Li, Guowen,et al. Mechanism of photosynthetic response in Microcystis aeruginosa PCC7806 to low inorganic phosphorus[J]. HARMFUL ALGAE,2010,9(6):613-619.
APA Wang, Zhicong,Li, Dunhai,Li, Guowen,Liu, Yongding,&Li, DH, Chinese Acad Sci, Inst Hydrobiol, 7 S Donghu Rd, Wuhan 430072, Peoples R China.(2010).Mechanism of photosynthetic response in Microcystis aeruginosa PCC7806 to low inorganic phosphorus.HARMFUL ALGAE,9(6),613-619.
MLA Wang, Zhicong,et al."Mechanism of photosynthetic response in Microcystis aeruginosa PCC7806 to low inorganic phosphorus".HARMFUL ALGAE 9.6(2010):613-619.
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